./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0fa134855523ba41b09db07b615548474e6d0ee22f6659fed051b05fa2d243f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:25,156 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:25,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:04:25,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:25,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:25,315 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:25,316 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:25,317 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:25,318 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:25,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:25,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:25,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:25,326 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:25,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:25,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:04:25,328 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:25,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:25,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:25,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:25,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:04:25,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:25,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:04:25,331 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:25,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:04:25,333 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:25,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:25,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:25,335 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:25,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:25,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:25,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:25,338 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:04:25,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:25,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:25,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:25,339 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:04:25,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:25,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:25,339 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:25,340 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_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0fa134855523ba41b09db07b615548474e6d0ee22f6659fed051b05fa2d243f [2023-11-12 02:04:25,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:25,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:25,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:25,703 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:25,703 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:25,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i [2023-11-12 02:04:28,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:29,066 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:29,067 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i [2023-11-12 02:04:29,078 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/data/43a955806/594a2b2bfd56412c8f5b5136f64d079f/FLAG507fa2a82 [2023-11-12 02:04:29,094 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/data/43a955806/594a2b2bfd56412c8f5b5136f64d079f [2023-11-12 02:04:29,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:29,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:29,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:29,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:29,106 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:29,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3387cb67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29, skipping insertion in model container [2023-11-12 02:04:29,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,154 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:29,328 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_b80b3858-85cb-4888-86d9-520aba67291c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i[919,932] [2023-11-12 02:04:29,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:29,433 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:29,446 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_b80b3858-85cb-4888-86d9-520aba67291c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i[919,932] [2023-11-12 02:04:29,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:29,531 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:29,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29 WrapperNode [2023-11-12 02:04:29,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:29,535 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:29,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:29,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:29,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,619 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 204 [2023-11-12 02:04:29,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:29,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:29,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:29,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:29,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,657 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:29,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:29,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:29,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:29,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (1/1) ... [2023-11-12 02:04:29,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:29,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:29,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:04:29,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:04:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:29,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:29,908 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:29,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:30,469 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:30,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:30,476 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:04:30,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:30 BoogieIcfgContainer [2023-11-12 02:04:30,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:30,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:30,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:30,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:30,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:29" (1/3) ... [2023-11-12 02:04:30,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f60f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:30, skipping insertion in model container [2023-11-12 02:04:30,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:29" (2/3) ... [2023-11-12 02:04:30,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f60f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:30, skipping insertion in model container [2023-11-12 02:04:30,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:30" (3/3) ... [2023-11-12 02:04:30,487 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-co_file-52.i [2023-11-12 02:04:30,506 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:30,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:04:30,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:30,561 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4a16c6b7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:30,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:04:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 60 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:04:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-12 02:04:30,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:30,584 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:30,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:30,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:30,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1040659298, now seen corresponding path program 1 times [2023-11-12 02:04:30,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:30,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224698509] [2023-11-12 02:04:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224698509] [2023-11-12 02:04:30,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:04:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427796277] [2023-11-12 02:04:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:30,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:30,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:30,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:04:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:31,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:04:31,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-11-12 02:04:31,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:31,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427796277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:31,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:31,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:04:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177846797] [2023-11-12 02:04:31,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:04:31,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:31,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:04:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:04:31,295 INFO L87 Difference]: Start difference. First operand has 84 states, 59 states have (on average 1.4915254237288136) internal successors, (88), 60 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:04:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:31,339 INFO L93 Difference]: Finished difference Result 161 states and 280 transitions. [2023-11-12 02:04:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:04:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 152 [2023-11-12 02:04:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:31,351 INFO L225 Difference]: With dead ends: 161 [2023-11-12 02:04:31,351 INFO L226 Difference]: Without dead ends: 80 [2023-11-12 02:04:31,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:04:31,359 INFO L413 NwaCegarLoop]: 125 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, 125 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 [2023-11-12 02:04:31,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-12 02:04:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-12 02:04:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:04:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 125 transitions. [2023-11-12 02:04:31,409 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 125 transitions. Word has length 152 [2023-11-12 02:04:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:31,410 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 125 transitions. [2023-11-12 02:04:31,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:04:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 125 transitions. [2023-11-12 02:04:31,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-12 02:04:31,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:31,415 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:31,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:31,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:04:31,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:31,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:31,624 INFO L85 PathProgramCache]: Analyzing trace with hash 481497130, now seen corresponding path program 1 times [2023-11-12 02:04:31,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:31,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935297596] [2023-11-12 02:04:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:31,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:31,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539629907] [2023-11-12 02:04:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:31,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:31,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:31,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:04:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:31,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:04:31,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 21 proven. 63 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-12 02:04:32,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:04:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-11-12 02:04:32,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:32,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935297596] [2023-11-12 02:04:32,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:32,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539629907] [2023-11-12 02:04:32,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539629907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:04:32,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:04:32,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-12 02:04:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794213117] [2023-11-12 02:04:32,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:04:32,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:04:32,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:04:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:04:32,841 INFO L87 Difference]: Start difference. First operand 80 states and 125 transitions. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 2 states have call predecessors, (44), 3 states have call successors, (44) [2023-11-12 02:04:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:34,674 INFO L93 Difference]: Finished difference Result 326 states and 500 transitions. [2023-11-12 02:04:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:04:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 2 states have call predecessors, (44), 3 states have call successors, (44) Word has length 152 [2023-11-12 02:04:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:34,682 INFO L225 Difference]: With dead ends: 326 [2023-11-12 02:04:34,683 INFO L226 Difference]: Without dead ends: 249 [2023-11-12 02:04:34,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:04:34,687 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 594 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:34,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 472 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:04:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-12 02:04:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 237. [2023-11-12 02:04:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 164 states have (on average 1.4085365853658536) internal successors, (231), 164 states have internal predecessors, (231), 66 states have call successors, (66), 6 states have call predecessors, (66), 6 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:04:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 363 transitions. [2023-11-12 02:04:34,772 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 363 transitions. Word has length 152 [2023-11-12 02:04:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:34,774 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 363 transitions. [2023-11-12 02:04:34,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 2 states have call predecessors, (44), 3 states have call successors, (44) [2023-11-12 02:04:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 363 transitions. [2023-11-12 02:04:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-12 02:04:34,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:34,780 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:34,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:34,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:34,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:34,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash 700351848, now seen corresponding path program 1 times [2023-11-12 02:04:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:34,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597639718] [2023-11-12 02:04:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:35,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:35,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704959209] [2023-11-12 02:04:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:35,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:35,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:35,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:04:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:35,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:35,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:04:35,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:35,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:35,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597639718] [2023-11-12 02:04:35,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704959209] [2023-11-12 02:04:35,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704959209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:35,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:35,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:04:35,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506111214] [2023-11-12 02:04:35,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:35,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:35,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:35,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:35,377 INFO L87 Difference]: Start difference. First operand 237 states and 363 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:35,647 INFO L93 Difference]: Finished difference Result 614 states and 941 transitions. [2023-11-12 02:04:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:35,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 152 [2023-11-12 02:04:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:35,654 INFO L225 Difference]: With dead ends: 614 [2023-11-12 02:04:35,654 INFO L226 Difference]: Without dead ends: 380 [2023-11-12 02:04:35,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:04:35,658 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 186 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:35,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 519 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:04:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-12 02:04:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 237. [2023-11-12 02:04:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 164 states have (on average 1.4085365853658536) internal successors, (231), 164 states have internal predecessors, (231), 66 states have call successors, (66), 6 states have call predecessors, (66), 6 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-12 02:04:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 363 transitions. [2023-11-12 02:04:35,734 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 363 transitions. Word has length 152 [2023-11-12 02:04:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:35,735 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 363 transitions. [2023-11-12 02:04:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 363 transitions. [2023-11-12 02:04:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-12 02:04:35,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:35,739 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:35,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:35,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:35,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1762102998, now seen corresponding path program 1 times [2023-11-12 02:04:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:35,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979231030] [2023-11-12 02:04:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:35,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:36,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871871689] [2023-11-12 02:04:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:36,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:36,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:36,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:36,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:04:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:36,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:04:36,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:04:36,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:36,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:36,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979231030] [2023-11-12 02:04:36,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:36,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871871689] [2023-11-12 02:04:36,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871871689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:36,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:04:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583120371] [2023-11-12 02:04:36,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:36,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:36,289 INFO L87 Difference]: Start difference. First operand 237 states and 363 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:36,555 INFO L93 Difference]: Finished difference Result 536 states and 819 transitions. [2023-11-12 02:04:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 152 [2023-11-12 02:04:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:36,560 INFO L225 Difference]: With dead ends: 536 [2023-11-12 02:04:36,561 INFO L226 Difference]: Without dead ends: 302 [2023-11-12 02:04:36,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:04:36,565 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 179 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:36,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 519 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:04:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-12 02:04:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 161. [2023-11-12 02:04:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 112 states have (on average 1.4017857142857142) internal successors, (157), 112 states have internal predecessors, (157), 44 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:04:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 245 transitions. [2023-11-12 02:04:36,656 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 245 transitions. Word has length 152 [2023-11-12 02:04:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:36,658 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 245 transitions. [2023-11-12 02:04:36,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 245 transitions. [2023-11-12 02:04:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 02:04:36,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:36,684 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:36,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:36,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:36,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:36,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -27974515, now seen corresponding path program 1 times [2023-11-12 02:04:36,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:36,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77627436] [2023-11-12 02:04:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:36,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:36,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:36,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780325006] [2023-11-12 02:04:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:36,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:36,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:36,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:04:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:37,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:04:37,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:04:37,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77627436] [2023-11-12 02:04:37,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:37,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780325006] [2023-11-12 02:04:37,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780325006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:37,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:37,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:04:37,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167965328] [2023-11-12 02:04:37,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:37,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:37,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:37,199 INFO L87 Difference]: Start difference. First operand 161 states and 245 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:37,315 INFO L93 Difference]: Finished difference Result 467 states and 710 transitions. [2023-11-12 02:04:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:04:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 153 [2023-11-12 02:04:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:37,319 INFO L225 Difference]: With dead ends: 467 [2023-11-12 02:04:37,319 INFO L226 Difference]: Without dead ends: 309 [2023-11-12 02:04:37,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:37,321 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 97 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:37,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 312 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-12 02:04:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 191. [2023-11-12 02:04:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 142 states have (on average 1.4154929577464788) internal successors, (201), 142 states have internal predecessors, (201), 44 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:04:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2023-11-12 02:04:37,387 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 153 [2023-11-12 02:04:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:37,388 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2023-11-12 02:04:37,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2023-11-12 02:04:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 02:04:37,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:37,392 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:37,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:37,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:37,599 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:37,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1833412849, now seen corresponding path program 1 times [2023-11-12 02:04:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589961516] [2023-11-12 02:04:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:37,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:37,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131515887] [2023-11-12 02:04:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:37,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:37,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:37,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:04:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:37,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:04:37,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:04:37,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:37,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589961516] [2023-11-12 02:04:37,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131515887] [2023-11-12 02:04:37,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131515887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:37,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:37,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:04:37,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358596612] [2023-11-12 02:04:37,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:37,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:37,860 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:37,988 INFO L93 Difference]: Finished difference Result 545 states and 830 transitions. [2023-11-12 02:04:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 153 [2023-11-12 02:04:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:37,992 INFO L225 Difference]: With dead ends: 545 [2023-11-12 02:04:37,992 INFO L226 Difference]: Without dead ends: 357 [2023-11-12 02:04:37,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:04:37,994 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 133 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:37,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 380 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:04:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-12 02:04:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 237. [2023-11-12 02:04:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 188 states have (on average 1.4414893617021276) internal successors, (271), 188 states have internal predecessors, (271), 44 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:04:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 359 transitions. [2023-11-12 02:04:38,066 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 359 transitions. Word has length 153 [2023-11-12 02:04:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:38,067 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 359 transitions. [2023-11-12 02:04:38,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 359 transitions. [2023-11-12 02:04:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 02:04:38,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:38,070 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:38,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:38,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:38,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1629427215, now seen corresponding path program 1 times [2023-11-12 02:04:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:38,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270223384] [2023-11-12 02:04:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:38,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:38,329 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:38,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119898956] [2023-11-12 02:04:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:38,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:38,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:38,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:38,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:04:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:38,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:04:38,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:04:38,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:38,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:38,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270223384] [2023-11-12 02:04:38,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:38,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119898956] [2023-11-12 02:04:38,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119898956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:38,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:04:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397089122] [2023-11-12 02:04:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:38,584 INFO L87 Difference]: Start difference. First operand 237 states and 359 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:38,789 INFO L93 Difference]: Finished difference Result 665 states and 1005 transitions. [2023-11-12 02:04:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:04:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 153 [2023-11-12 02:04:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:38,794 INFO L225 Difference]: With dead ends: 665 [2023-11-12 02:04:38,794 INFO L226 Difference]: Without dead ends: 431 [2023-11-12 02:04:38,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:38,796 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 115 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:38,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 423 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:04:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-12 02:04:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 240. [2023-11-12 02:04:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 191 states have (on average 1.4397905759162304) internal successors, (275), 191 states have internal predecessors, (275), 44 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:04:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2023-11-12 02:04:38,857 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 153 [2023-11-12 02:04:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:38,858 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2023-11-12 02:04:38,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2023-11-12 02:04:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-12 02:04:38,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:38,861 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:38,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:04:39,068 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:39,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash -860101747, now seen corresponding path program 1 times [2023-11-12 02:04:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278586266] [2023-11-12 02:04:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:39,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:39,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230126860] [2023-11-12 02:04:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:39,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:04:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:39,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:04:39,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:04:39,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:04:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:39,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278586266] [2023-11-12 02:04:39,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:04:39,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230126860] [2023-11-12 02:04:39,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230126860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:39,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:39,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:04:39,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308631326] [2023-11-12 02:04:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:39,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:04:39,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:39,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:04:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:04:39,325 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:04:39,598 INFO L93 Difference]: Finished difference Result 596 states and 895 transitions. [2023-11-12 02:04:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:04:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 153 [2023-11-12 02:04:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:04:39,606 INFO L225 Difference]: With dead ends: 596 [2023-11-12 02:04:39,606 INFO L226 Difference]: Without dead ends: 359 [2023-11-12 02:04:39,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:04:39,609 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 167 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:04:39,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 384 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:04:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-12 02:04:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 240. [2023-11-12 02:04:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 191 states have (on average 1.4397905759162304) internal successors, (275), 191 states have internal predecessors, (275), 44 states have call successors, (44), 4 states have call predecessors, (44), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:04:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2023-11-12 02:04:39,667 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 153 [2023-11-12 02:04:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:04:39,668 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2023-11-12 02:04:39,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:04:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2023-11-12 02:04:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-12 02:04:39,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:04:39,671 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:04:39,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:04:39,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:39,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:04:39,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash 149067637, now seen corresponding path program 1 times [2023-11-12 02:04:39,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:39,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969647782] [2023-11-12 02:04:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:39,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:39,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:04:39,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676734097] [2023-11-12 02:04:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:39,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:04:39,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:39,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:04:39,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b80b3858-85cb-4888-86d9-520aba67291c/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:04:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:40,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-12 02:04:40,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:04:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 24 proven. 120 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-11-12 02:04:41,058 INFO L327 TraceCheckSpWp]: Computing backward predicates...