./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-84.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-84.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 12d3a43944bcf873edb66a7d9a5f702d0b9b38d53543038559519bc18ead71d6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:11:20,714 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:11:20,817 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:11:20,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:11:20,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:11:20,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:11:20,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:11:20,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:11:20,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:11:20,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:11:20,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:11:20,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:11:20,898 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:11:20,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:11:20,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:11:20,901 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:11:20,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:11:20,902 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:11:20,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:11:20,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:11:20,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:11:20,904 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:11:20,905 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:11:20,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:11:20,906 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:11:20,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:11:20,909 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:11:20,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:11:20,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:20,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:11:20,912 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:11:20,912 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:11:20,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:11:20,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:11:20,913 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:11:20,914 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:11:20,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:11:20,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:11:20,914 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:11:20,915 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_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12d3a43944bcf873edb66a7d9a5f702d0b9b38d53543038559519bc18ead71d6 [2023-11-06 23:11:21,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:11:21,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:11:21,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:11:21,376 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:11:21,376 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:11:21,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-84.i [2023-11-06 23:11:24,837 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:11:25,251 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:11:25,252 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-84.i [2023-11-06 23:11:25,284 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/data/8342d8751/c70ab59fa4b4417fbd9b870865b82628/FLAG532b5c1c8 [2023-11-06 23:11:25,304 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/data/8342d8751/c70ab59fa4b4417fbd9b870865b82628 [2023-11-06 23:11:25,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:11:25,316 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:11:25,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:25,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:11:25,330 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:11:25,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:25" (1/1) ... [2023-11-06 23:11:25,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6945d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:25, skipping insertion in model container [2023-11-06 23:11:25,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:25" (1/1) ... [2023-11-06 23:11:25,417 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:25,669 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_22cd04fa-6c54-4759-9f0d-148b8289f93d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-84.i[916,929] [2023-11-06 23:11:25,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:25,953 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:11:25,969 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_22cd04fa-6c54-4759-9f0d-148b8289f93d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-84.i[916,929] [2023-11-06 23:11:26,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:26,183 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:11:26,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26 WrapperNode [2023-11-06 23:11:26,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:26,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:26,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:11:26,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:11:26,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,412 INFO L138 Inliner]: procedures = 26, calls = 138, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1028 [2023-11-06 23:11:26,412 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:26,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:11:26,414 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:11:26,414 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:11:26,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,563 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,576 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:11:26,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:11:26,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:11:26,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:11:26,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (1/1) ... [2023-11-06 23:11:26,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:26,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:26,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:11:26,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:11:26,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:11:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:11:26,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:11:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:11:26,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:11:26,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:11:26,847 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:11:26,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:11:28,431 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:11:28,448 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:11:28,448 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:11:28,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:28 BoogieIcfgContainer [2023-11-06 23:11:28,452 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:11:28,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:11:28,489 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:11:28,492 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:11:28,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:11:25" (1/3) ... [2023-11-06 23:11:28,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50295762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:28, skipping insertion in model container [2023-11-06 23:11:28,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:26" (2/3) ... [2023-11-06 23:11:28,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50295762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:28, skipping insertion in model container [2023-11-06 23:11:28,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:28" (3/3) ... [2023-11-06 23:11:28,499 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-84.i [2023-11-06 23:11:28,519 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:11:28,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:11:28,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:28,611 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=LoopsAndPotentialCycles, 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;@406fcbb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:28,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:11:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 380 states, 252 states have (on average 1.630952380952381) internal successors, (411), 253 states have internal predecessors, (411), 125 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-06 23:11:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2023-11-06 23:11:28,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:28,671 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:28,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:28,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1672996281, now seen corresponding path program 1 times [2023-11-06 23:11:28,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540932856] [2023-11-06 23:11:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:28,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:29,191 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862985458] [2023-11-06 23:11:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:29,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:29,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:29,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:29,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:11:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:29,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:11:29,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:30,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:30,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:30,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540932856] [2023-11-06 23:11:30,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:30,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862985458] [2023-11-06 23:11:30,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862985458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:30,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:30,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:11:30,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510355911] [2023-11-06 23:11:30,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:30,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:11:30,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:11:30,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:11:30,259 INFO L87 Difference]: Start difference. First operand has 380 states, 252 states have (on average 1.630952380952381) internal successors, (411), 253 states have internal predecessors, (411), 125 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:30,361 INFO L93 Difference]: Finished difference Result 752 states and 1439 transitions. [2023-11-06 23:11:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:11:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 793 [2023-11-06 23:11:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:30,388 INFO L225 Difference]: With dead ends: 752 [2023-11-06 23:11:30,388 INFO L226 Difference]: Without dead ends: 375 [2023-11-06 23:11:30,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:11:30,404 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:30,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-06 23:11:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2023-11-06 23:11:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 248 states have (on average 1.6129032258064515) internal successors, (400), 248 states have internal predecessors, (400), 125 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-06 23:11:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 650 transitions. [2023-11-06 23:11:30,637 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 650 transitions. Word has length 793 [2023-11-06 23:11:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:30,649 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 650 transitions. [2023-11-06 23:11:30,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 650 transitions. [2023-11-06 23:11:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2023-11-06 23:11:30,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:30,695 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:30,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:30,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:11:30,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:30,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1585088143, now seen corresponding path program 1 times [2023-11-06 23:11:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:30,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312181013] [2023-11-06 23:11:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:31,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525307932] [2023-11-06 23:11:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:31,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:31,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:31,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:11:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:31,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:11:31,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:32,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312181013] [2023-11-06 23:11:32,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525307932] [2023-11-06 23:11:32,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525307932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:32,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:32,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:11:32,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656895210] [2023-11-06 23:11:32,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:32,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:11:32,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:32,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:11:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:32,098 INFO L87 Difference]: Start difference. First operand 375 states and 650 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:33,277 INFO L93 Difference]: Finished difference Result 1454 states and 2519 transitions. [2023-11-06 23:11:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:11:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 794 [2023-11-06 23:11:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:33,299 INFO L225 Difference]: With dead ends: 1454 [2023-11-06 23:11:33,299 INFO L226 Difference]: Without dead ends: 1082 [2023-11-06 23:11:33,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:33,305 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1268 mSDsluCounter, 1664 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:33,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 2308 Invalid, 789 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [503 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:11:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2023-11-06 23:11:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 760. [2023-11-06 23:11:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 507 states have (on average 1.6232741617357003) internal successors, (823), 507 states have internal predecessors, (823), 250 states have call successors, (250), 2 states have call predecessors, (250), 2 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2023-11-06 23:11:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1323 transitions. [2023-11-06 23:11:33,539 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1323 transitions. Word has length 794 [2023-11-06 23:11:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:33,542 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1323 transitions. [2023-11-06 23:11:33,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1323 transitions. [2023-11-06 23:11:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2023-11-06 23:11:33,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:33,574 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:33,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:33,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:33,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:33,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1448961903, now seen corresponding path program 1 times [2023-11-06 23:11:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386458351] [2023-11-06 23:11:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:33,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:33,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817139520] [2023-11-06 23:11:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:33,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:33,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:11:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:34,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:11:34,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:34,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:34,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:34,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386458351] [2023-11-06 23:11:34,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:34,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817139520] [2023-11-06 23:11:34,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817139520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:34,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:11:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997840244] [2023-11-06 23:11:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:34,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:11:34,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:34,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:11:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:34,695 INFO L87 Difference]: Start difference. First operand 760 states and 1323 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:34,809 INFO L93 Difference]: Finished difference Result 1535 states and 2679 transitions. [2023-11-06 23:11:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:11:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 794 [2023-11-06 23:11:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:34,819 INFO L225 Difference]: With dead ends: 1535 [2023-11-06 23:11:34,819 INFO L226 Difference]: Without dead ends: 778 [2023-11-06 23:11:34,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:11:34,849 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 10 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:34,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2562 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2023-11-06 23:11:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 768. [2023-11-06 23:11:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 515 states have (on average 1.6252427184466018) internal successors, (837), 515 states have internal predecessors, (837), 250 states have call successors, (250), 2 states have call predecessors, (250), 2 states have return successors, (250), 250 states have call predecessors, (250), 250 states have call successors, (250) [2023-11-06 23:11:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1337 transitions. [2023-11-06 23:11:34,995 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1337 transitions. Word has length 794 [2023-11-06 23:11:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:35,002 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1337 transitions. [2023-11-06 23:11:35,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1337 transitions. [2023-11-06 23:11:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-11-06 23:11:35,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:35,019 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:35,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:35,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:35,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash 790849615, now seen corresponding path program 1 times [2023-11-06 23:11:35,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479672280] [2023-11-06 23:11:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:35,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:35,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676742786] [2023-11-06 23:11:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:35,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:35,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:35,374 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:35,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:11:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:35,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:35,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:36,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479672280] [2023-11-06 23:11:36,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676742786] [2023-11-06 23:11:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676742786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:36,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:36,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243170079] [2023-11-06 23:11:36,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:36,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:36,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:36,068 INFO L87 Difference]: Start difference. First operand 768 states and 1337 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:36,201 INFO L93 Difference]: Finished difference Result 2042 states and 3577 transitions. [2023-11-06 23:11:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:36,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 795 [2023-11-06 23:11:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:36,215 INFO L225 Difference]: With dead ends: 2042 [2023-11-06 23:11:36,216 INFO L226 Difference]: Without dead ends: 1277 [2023-11-06 23:11:36,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:36,221 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 425 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:36,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1396 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2023-11-06 23:11:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1273. [2023-11-06 23:11:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 920 states have (on average 1.6619565217391303) internal successors, (1529), 922 states have internal predecessors, (1529), 348 states have call successors, (348), 4 states have call predecessors, (348), 4 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-06 23:11:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2225 transitions. [2023-11-06 23:11:36,440 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2225 transitions. Word has length 795 [2023-11-06 23:11:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:36,442 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 2225 transitions. [2023-11-06 23:11:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2225 transitions. [2023-11-06 23:11:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-11-06 23:11:36,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:36,453 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:36,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:36,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:36,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1667660365, now seen corresponding path program 1 times [2023-11-06 23:11:36,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:36,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258204960] [2023-11-06 23:11:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:36,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:36,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505869239] [2023-11-06 23:11:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:36,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:36,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:36,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:36,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:11:37,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:37,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:11:37,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:38,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258204960] [2023-11-06 23:11:38,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505869239] [2023-11-06 23:11:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505869239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:38,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:11:38,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078682152] [2023-11-06 23:11:38,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:11:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:11:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:38,944 INFO L87 Difference]: Start difference. First operand 1273 states and 2225 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 6 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:42,231 INFO L93 Difference]: Finished difference Result 5943 states and 10266 transitions. [2023-11-06 23:11:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:11:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 6 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 795 [2023-11-06 23:11:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:42,276 INFO L225 Difference]: With dead ends: 5943 [2023-11-06 23:11:42,277 INFO L226 Difference]: Without dead ends: 4673 [2023-11-06 23:11:42,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:11:42,285 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 1865 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1865 Valid, 3771 Invalid, 2222 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [610 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 23:11:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2023-11-06 23:11:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 3840. [2023-11-06 23:11:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3840 states, 2697 states have (on average 1.632183908045977) internal successors, (4402), 2706 states have internal predecessors, (4402), 1123 states have call successors, (1123), 19 states have call predecessors, (1123), 19 states have return successors, (1123), 1114 states have call predecessors, (1123), 1123 states have call successors, (1123) [2023-11-06 23:11:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3840 states to 3840 states and 6648 transitions. [2023-11-06 23:11:43,128 INFO L78 Accepts]: Start accepts. Automaton has 3840 states and 6648 transitions. Word has length 795 [2023-11-06 23:11:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:43,130 INFO L495 AbstractCegarLoop]: Abstraction has 3840 states and 6648 transitions. [2023-11-06 23:11:43,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 6 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3840 states and 6648 transitions. [2023-11-06 23:11:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-11-06 23:11:43,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:43,144 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:43,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:43,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:43,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:43,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1948034677, now seen corresponding path program 1 times [2023-11-06 23:11:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:43,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541054614] [2023-11-06 23:11:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:43,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:43,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765984160] [2023-11-06 23:11:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:43,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:43,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:43,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:43,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:11:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:44,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:44,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:44,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541054614] [2023-11-06 23:11:44,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765984160] [2023-11-06 23:11:44,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765984160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:44,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:44,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:44,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607313767] [2023-11-06 23:11:44,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:44,275 INFO L87 Difference]: Start difference. First operand 3840 states and 6648 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:44,701 INFO L93 Difference]: Finished difference Result 8598 states and 14892 transitions. [2023-11-06 23:11:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 795 [2023-11-06 23:11:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:44,741 INFO L225 Difference]: With dead ends: 8598 [2023-11-06 23:11:44,741 INFO L226 Difference]: Without dead ends: 4856 [2023-11-06 23:11:44,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:44,759 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 448 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:44,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1277 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2023-11-06 23:11:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4694. [2023-11-06 23:11:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4694 states, 3389 states have (on average 1.6349955739156092) internal successors, (5541), 3402 states have internal predecessors, (5541), 1279 states have call successors, (1279), 25 states have call predecessors, (1279), 25 states have return successors, (1279), 1266 states have call predecessors, (1279), 1279 states have call successors, (1279) [2023-11-06 23:11:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 8099 transitions. [2023-11-06 23:11:45,620 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 8099 transitions. Word has length 795 [2023-11-06 23:11:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:45,621 INFO L495 AbstractCegarLoop]: Abstraction has 4694 states and 8099 transitions. [2023-11-06 23:11:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 8099 transitions. [2023-11-06 23:11:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-11-06 23:11:45,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:45,638 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:45,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:45,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:11:45,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:45,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 443181263, now seen corresponding path program 1 times [2023-11-06 23:11:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998828655] [2023-11-06 23:11:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:45,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:45,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:45,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854254621] [2023-11-06 23:11:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:45,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:11:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:46,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:46,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:11:46,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:46,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998828655] [2023-11-06 23:11:46,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854254621] [2023-11-06 23:11:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854254621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:46,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:46,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:46,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22585416] [2023-11-06 23:11:46,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:46,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:46,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:46,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:46,769 INFO L87 Difference]: Start difference. First operand 4694 states and 8099 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:47,350 INFO L93 Difference]: Finished difference Result 13258 states and 22873 transitions. [2023-11-06 23:11:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 795 [2023-11-06 23:11:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:47,468 INFO L225 Difference]: With dead ends: 13258 [2023-11-06 23:11:47,468 INFO L226 Difference]: Without dead ends: 8662 [2023-11-06 23:11:47,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:47,491 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 434 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:47,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1477 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:11:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8662 states. [2023-11-06 23:11:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8662 to 8652. [2023-11-06 23:11:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 6313 states have (on average 1.626643434183431) internal successors, (10269), 6342 states have internal predecessors, (10269), 2291 states have call successors, (2291), 47 states have call predecessors, (2291), 47 states have return successors, (2291), 2262 states have call predecessors, (2291), 2291 states have call successors, (2291) [2023-11-06 23:11:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 14851 transitions. [2023-11-06 23:11:48,847 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 14851 transitions. Word has length 795 [2023-11-06 23:11:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:48,849 INFO L495 AbstractCegarLoop]: Abstraction has 8652 states and 14851 transitions. [2023-11-06 23:11:48,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:11:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 14851 transitions. [2023-11-06 23:11:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2023-11-06 23:11:48,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:48,940 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:48,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:49,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:11:49,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:49,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1397121421, now seen corresponding path program 1 times [2023-11-06 23:11:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319783948] [2023-11-06 23:11:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:49,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:49,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:49,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619269402] [2023-11-06 23:11:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:49,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:49,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:49,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:49,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:11:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:50,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 1871 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:11:50,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:12:09,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:09,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:09,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319783948] [2023-11-06 23:12:09,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:09,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619269402] [2023-11-06 23:12:09,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619269402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:09,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:09,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:12:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615887772] [2023-11-06 23:12:09,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:12:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:09,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:12:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:09,089 INFO L87 Difference]: Start difference. First operand 8652 states and 14851 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:12:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:15,167 INFO L93 Difference]: Finished difference Result 18204 states and 30958 transitions. [2023-11-06 23:12:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:12:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 795 [2023-11-06 23:12:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:15,216 INFO L225 Difference]: With dead ends: 18204 [2023-11-06 23:12:15,217 INFO L226 Difference]: Without dead ends: 9650 [2023-11-06 23:12:15,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:12:15,255 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 98 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:15,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 2548 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 23:12:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2023-11-06 23:12:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 9616. [2023-11-06 23:12:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9616 states, 7116 states have (on average 1.5919055649241147) internal successors, (11328), 7177 states have internal predecessors, (11328), 2419 states have call successors, (2419), 80 states have call predecessors, (2419), 80 states have return successors, (2419), 2358 states have call predecessors, (2419), 2419 states have call successors, (2419) [2023-11-06 23:12:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9616 states to 9616 states and 16166 transitions. [2023-11-06 23:12:16,823 INFO L78 Accepts]: Start accepts. Automaton has 9616 states and 16166 transitions. Word has length 795 [2023-11-06 23:12:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:16,825 INFO L495 AbstractCegarLoop]: Abstraction has 9616 states and 16166 transitions. [2023-11-06 23:12:16,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:12:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9616 states and 16166 transitions. [2023-11-06 23:12:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2023-11-06 23:12:16,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:16,850 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:16,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:17,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:17,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:17,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1675851656, now seen corresponding path program 1 times [2023-11-06 23:12:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182988888] [2023-11-06 23:12:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:17,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:17,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616749739] [2023-11-06 23:12:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:17,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:17,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:17,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:12:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:17,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:12:17,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:12:19,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:19,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:19,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182988888] [2023-11-06 23:12:19,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:19,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616749739] [2023-11-06 23:12:19,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616749739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:19,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:19,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:12:19,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539818927] [2023-11-06 23:12:19,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:19,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:12:19,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:12:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:12:19,328 INFO L87 Difference]: Start difference. First operand 9616 states and 16166 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:12:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:20,574 INFO L93 Difference]: Finished difference Result 28644 states and 48180 transitions. [2023-11-06 23:12:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:12:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 796 [2023-11-06 23:12:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:20,661 INFO L225 Difference]: With dead ends: 28644 [2023-11-06 23:12:20,661 INFO L226 Difference]: Without dead ends: 19130 [2023-11-06 23:12:20,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:12:20,703 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 285 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:20,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1290 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:12:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19130 states. [2023-11-06 23:12:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19130 to 18984. [2023-11-06 23:12:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18984 states, 14046 states have (on average 1.5867862736722198) internal successors, (22288), 14167 states have internal predecessors, (22288), 4779 states have call successors, (4779), 158 states have call predecessors, (4779), 158 states have return successors, (4779), 4658 states have call predecessors, (4779), 4779 states have call successors, (4779) [2023-11-06 23:12:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18984 states to 18984 states and 31846 transitions. [2023-11-06 23:12:23,121 INFO L78 Accepts]: Start accepts. Automaton has 18984 states and 31846 transitions. Word has length 796 [2023-11-06 23:12:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:23,122 INFO L495 AbstractCegarLoop]: Abstraction has 18984 states and 31846 transitions. [2023-11-06 23:12:23,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:12:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 18984 states and 31846 transitions. [2023-11-06 23:12:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2023-11-06 23:12:23,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:23,158 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:23,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:23,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:23,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:23,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1799294776, now seen corresponding path program 1 times [2023-11-06 23:12:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609581150] [2023-11-06 23:12:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:23,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:23,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709546138] [2023-11-06 23:12:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:23,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:23,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:23,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:23,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:12:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:24,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:12:24,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:12:25,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609581150] [2023-11-06 23:12:25,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709546138] [2023-11-06 23:12:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709546138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:12:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515877605] [2023-11-06 23:12:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:25,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:12:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:12:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:25,762 INFO L87 Difference]: Start difference. First operand 18984 states and 31846 transitions. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:12:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:34,205 INFO L93 Difference]: Finished difference Result 108207 states and 181036 transitions. [2023-11-06 23:12:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:12:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 796 [2023-11-06 23:12:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:34,665 INFO L225 Difference]: With dead ends: 108207 [2023-11-06 23:12:34,665 INFO L226 Difference]: Without dead ends: 89325 [2023-11-06 23:12:34,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:12:34,738 INFO L413 NwaCegarLoop]: 1708 mSDtfsCounter, 2169 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 5274 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:34,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 5274 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 23:12:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89325 states. [2023-11-06 23:12:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89325 to 58984. [2023-11-06 23:12:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58984 states, 44502 states have (on average 1.6042425059547885) internal successors, (71392), 44871 states have internal predecessors, (71392), 14011 states have call successors, (14011), 470 states have call predecessors, (14011), 470 states have return successors, (14011), 13642 states have call predecessors, (14011), 14011 states have call successors, (14011) [2023-11-06 23:12:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58984 states to 58984 states and 99414 transitions. [2023-11-06 23:12:45,010 INFO L78 Accepts]: Start accepts. Automaton has 58984 states and 99414 transitions. Word has length 796 [2023-11-06 23:12:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:45,011 INFO L495 AbstractCegarLoop]: Abstraction has 58984 states and 99414 transitions. [2023-11-06 23:12:45,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 5 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:12:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 58984 states and 99414 transitions. [2023-11-06 23:12:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2023-11-06 23:12:45,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:45,097 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:45,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:45,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:12:45,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:45,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1945718472, now seen corresponding path program 1 times [2023-11-06 23:12:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:45,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995768837] [2023-11-06 23:12:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:45,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:45,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985540243] [2023-11-06 23:12:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:45,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:45,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:45,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:12:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:46,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:12:46,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 9618 proven. 69 refuted. 0 times theorem prover too weak. 21313 trivial. 0 not checked. [2023-11-06 23:12:46,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 303 proven. 69 refuted. 0 times theorem prover too weak. 30628 trivial. 0 not checked. [2023-11-06 23:12:47,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995768837] [2023-11-06 23:12:47,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:47,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985540243] [2023-11-06 23:12:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985540243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:47,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:12:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:12:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132392799] [2023-11-06 23:12:47,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:47,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:12:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:12:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:12:47,545 INFO L87 Difference]: Start difference. First operand 58984 states and 99414 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (149), 2 states have call predecessors, (149), 2 states have call successors, (149) [2023-11-06 23:12:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:53,158 INFO L93 Difference]: Finished difference Result 117460 states and 197479 transitions. [2023-11-06 23:12:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:12:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (149), 2 states have call predecessors, (149), 2 states have call successors, (149) Word has length 796 [2023-11-06 23:12:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:53,393 INFO L225 Difference]: With dead ends: 117460 [2023-11-06 23:12:53,393 INFO L226 Difference]: Without dead ends: 58578 [2023-11-06 23:12:53,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1594 GetRequests, 1584 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:12:53,515 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 1093 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:53,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 1272 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:12:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58578 states. [2023-11-06 23:13:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58578 to 58024. [2023-11-06 23:13:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58024 states, 43526 states have (on average 1.588383954418049) internal successors, (69136), 43895 states have internal predecessors, (69136), 14011 states have call successors, (14011), 486 states have call predecessors, (14011), 486 states have return successors, (14011), 13642 states have call predecessors, (14011), 14011 states have call successors, (14011) [2023-11-06 23:13:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58024 states to 58024 states and 97158 transitions. [2023-11-06 23:13:01,058 INFO L78 Accepts]: Start accepts. Automaton has 58024 states and 97158 transitions. Word has length 796 [2023-11-06 23:13:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:01,060 INFO L495 AbstractCegarLoop]: Abstraction has 58024 states and 97158 transitions. [2023-11-06 23:13:01,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (148), 2 states have call predecessors, (148), 4 states have return successors, (149), 2 states have call predecessors, (149), 2 states have call successors, (149) [2023-11-06 23:13:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 58024 states and 97158 transitions. [2023-11-06 23:13:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2023-11-06 23:13:01,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:01,458 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:01,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 23:13:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:13:01,669 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:01,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1571648665, now seen corresponding path program 1 times [2023-11-06 23:13:01,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:01,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658267127] [2023-11-06 23:13:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:01,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:01,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:01,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863587132] [2023-11-06 23:13:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:01,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:01,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:01,784 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:01,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:13:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:02,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:13:02,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 1104 proven. 366 refuted. 0 times theorem prover too weak. 29530 trivial. 0 not checked. [2023-11-06 23:13:03,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 6 proven. 366 refuted. 0 times theorem prover too weak. 30628 trivial. 0 not checked. [2023-11-06 23:13:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658267127] [2023-11-06 23:13:04,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863587132] [2023-11-06 23:13:04,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863587132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:13:04,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:13:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 23:13:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169629430] [2023-11-06 23:13:04,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:04,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:13:04,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:13:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:13:04,644 INFO L87 Difference]: Start difference. First operand 58024 states and 97158 transitions. Second operand has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 3 states have call successors, (247), 2 states have call predecessors, (247), 4 states have return successors, (248), 3 states have call predecessors, (248), 3 states have call successors, (248) [2023-11-06 23:13:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:10,915 INFO L93 Difference]: Finished difference Result 118040 states and 195866 transitions. [2023-11-06 23:13:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:13:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 3 states have call successors, (247), 2 states have call predecessors, (247), 4 states have return successors, (248), 3 states have call predecessors, (248), 3 states have call successors, (248) Word has length 796 [2023-11-06 23:13:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:11,108 INFO L225 Difference]: With dead ends: 118040 [2023-11-06 23:13:11,108 INFO L226 Difference]: Without dead ends: 60118 [2023-11-06 23:13:11,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1594 GetRequests, 1582 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:13:11,224 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 479 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:11,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1948 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:13:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60118 states. [2023-11-06 23:13:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60118 to 59564. [2023-11-06 23:13:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59564 states, 44681 states have (on average 1.5688771513618764) internal successors, (70099), 45050 states have internal predecessors, (70099), 14011 states have call successors, (14011), 871 states have call predecessors, (14011), 871 states have return successors, (14011), 13642 states have call predecessors, (14011), 14011 states have call successors, (14011) [2023-11-06 23:13:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59564 states to 59564 states and 98121 transitions. [2023-11-06 23:13:17,996 INFO L78 Accepts]: Start accepts. Automaton has 59564 states and 98121 transitions. Word has length 796 [2023-11-06 23:13:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:17,997 INFO L495 AbstractCegarLoop]: Abstraction has 59564 states and 98121 transitions. [2023-11-06 23:13:17,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 3 states have call successors, (247), 2 states have call predecessors, (247), 4 states have return successors, (248), 3 states have call predecessors, (248), 3 states have call successors, (248) [2023-11-06 23:13:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 59564 states and 98121 transitions. [2023-11-06 23:13:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2023-11-06 23:13:18,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:18,063 INFO L195 NwaCegarLoop]: trace histogram [125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:18,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:13:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:13:18,272 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:18,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1712201381, now seen corresponding path program 1 times [2023-11-06 23:13:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207125304] [2023-11-06 23:13:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:18,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:13:18,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448745734] [2023-11-06 23:13:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:18,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:18,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22cd04fa-6c54-4759-9f0d-148b8289f93d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:13:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:19,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:13:19,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 31000 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31000 trivial. 0 not checked. [2023-11-06 23:13:19,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:13:19,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:19,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207125304] [2023-11-06 23:13:19,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:13:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448745734] [2023-11-06 23:13:19,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448745734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:13:19,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:13:19,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:13:19,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300148335] [2023-11-06 23:13:19,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:13:19,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:13:19,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:13:19,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:13:19,804 INFO L87 Difference]: Start difference. First operand 59564 states and 98121 transitions. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) [2023-11-06 23:13:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:23,976 INFO L93 Difference]: Finished difference Result 119796 states and 196660 transitions. [2023-11-06 23:13:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:13:23,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 1 states have call successors, (125), 1 states have call predecessors, (125), 1 states have return successors, (125), 1 states have call predecessors, (125), 1 states have call successors, (125) Word has length 796 [2023-11-06 23:13:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:24,116 INFO L225 Difference]: With dead ends: 119796 [2023-11-06 23:13:24,116 INFO L226 Difference]: Without dead ends: 60338 [2023-11-06 23:13:24,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 798 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:13:24,206 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 77 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2549 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:24,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2549 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:13:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60338 states.