./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu --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 c7e974c6e5fec01354043338f8cc30b791da3683a39f1bcafe943125c6faad54 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:17,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:17,196 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:17,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:17,205 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:17,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:17,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:17,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:17,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:17,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:17,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:17,253 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:17,254 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:17,256 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:17,256 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:17,257 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:17,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:17,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:17,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:17,258 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:17,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:17,259 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:17,260 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:17,260 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:17,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:17,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:17,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:17,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:17,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:17,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:17,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:17,265 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:17,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:17,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:17,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:17,266 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:17,267 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:17,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:17,267 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:17,268 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_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e974c6e5fec01354043338f8cc30b791da3683a39f1bcafe943125c6faad54 [2023-11-19 08:05:17,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:17,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:17,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:17,628 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:17,628 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:17,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i [2023-11-19 08:05:20,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:20,923 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:20,923 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i [2023-11-19 08:05:20,940 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/data/b1f306d0b/ce0090116aa44c26ae1b3dd201dec6b7/FLAG484691018 [2023-11-19 08:05:20,958 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/data/b1f306d0b/ce0090116aa44c26ae1b3dd201dec6b7 [2023-11-19 08:05:20,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:20,968 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:20,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:20,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:20,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:20,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:20" (1/1) ... [2023-11-19 08:05:20,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbc71d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:20, skipping insertion in model container [2023-11-19 08:05:20,980 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:20" (1/1) ... [2023-11-19 08:05:21,036 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:21,197 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_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i[916,929] [2023-11-19 08:05:21,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:21,426 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:21,436 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_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i[916,929] [2023-11-19 08:05:21,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:21,573 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:21,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21 WrapperNode [2023-11-19 08:05:21,573 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:21,574 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:21,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:21,575 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:21,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,703 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 484 [2023-11-19 08:05:21,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:21,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:21,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:21,705 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:21,715 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,798 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:21,867 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:21,868 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:21,868 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:21,869 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (1/1) ... [2023-11-19 08:05:21,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:21,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:22,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:22,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:22,028 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:05:22,029 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:05:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:22,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:22,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:22,215 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:22,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:23,302 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:23,319 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:23,320 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:05:23,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:23 BoogieIcfgContainer [2023-11-19 08:05:23,328 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:23,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:23,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:23,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:23,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:20" (1/3) ... [2023-11-19 08:05:23,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2032bc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:23, skipping insertion in model container [2023-11-19 08:05:23,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:21" (2/3) ... [2023-11-19 08:05:23,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2032bc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:23, skipping insertion in model container [2023-11-19 08:05:23,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:23" (3/3) ... [2023-11-19 08:05:23,339 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-36.i [2023-11-19 08:05:23,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:23,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:05:23,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:23,425 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;@746a4788, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:23,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:05:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 138 states have (on average 1.5) internal successors, (207), 139 states have internal predecessors, (207), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-19 08:05:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 08:05:23,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:23,466 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:23,467 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:23,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1923556289, now seen corresponding path program 1 times [2023-11-19 08:05:23,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:23,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615884040] [2023-11-19 08:05:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:23,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:23,893 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:23,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635848463] [2023-11-19 08:05:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:23,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:23,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:23,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:23,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:24,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:05:24,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:24,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:24,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615884040] [2023-11-19 08:05:24,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635848463] [2023-11-19 08:05:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635848463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:24,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384139927] [2023-11-19 08:05:24,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:24,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:24,739 INFO L87 Difference]: Start difference. First operand has 197 states, 138 states have (on average 1.5) internal successors, (207), 139 states have internal predecessors, (207), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:24,920 INFO L93 Difference]: Finished difference Result 574 states and 1051 transitions. [2023-11-19 08:05:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-19 08:05:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:24,955 INFO L225 Difference]: With dead ends: 574 [2023-11-19 08:05:24,960 INFO L226 Difference]: Without dead ends: 380 [2023-11-19 08:05:24,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:24,982 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 275 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:24,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 778 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:25,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-19 08:05:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 226. [2023-11-19 08:05:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 168 states have (on average 1.5238095238095237) internal successors, (256), 168 states have internal predecessors, (256), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-19 08:05:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 368 transitions. [2023-11-19 08:05:25,119 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 368 transitions. Word has length 370 [2023-11-19 08:05:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:25,124 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 368 transitions. [2023-11-19 08:05:25,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 368 transitions. [2023-11-19 08:05:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 08:05:25,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:25,138 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:25,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:05:25,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:05:25,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:25,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:25,357 INFO L85 PathProgramCache]: Analyzing trace with hash 234612547, now seen corresponding path program 1 times [2023-11-19 08:05:25,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:25,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129243644] [2023-11-19 08:05:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:25,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:25,590 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:25,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648719893] [2023-11-19 08:05:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:25,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:25,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:25,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:25,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:05:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:25,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:05:26,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:26,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:26,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129243644] [2023-11-19 08:05:26,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:26,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648719893] [2023-11-19 08:05:26,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648719893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:26,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:26,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:05:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293778917] [2023-11-19 08:05:26,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:26,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:26,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:26,546 INFO L87 Difference]: Start difference. First operand 226 states and 368 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:26,916 INFO L93 Difference]: Finished difference Result 672 states and 1097 transitions. [2023-11-19 08:05:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:26,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-19 08:05:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:26,931 INFO L225 Difference]: With dead ends: 672 [2023-11-19 08:05:26,932 INFO L226 Difference]: Without dead ends: 449 [2023-11-19 08:05:26,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:26,937 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 289 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:26,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1171 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:05:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-19 08:05:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 321. [2023-11-19 08:05:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 206 states have (on average 1.4174757281553398) internal successors, (292), 206 states have internal predecessors, (292), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 08:05:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 516 transitions. [2023-11-19 08:05:27,056 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 516 transitions. Word has length 370 [2023-11-19 08:05:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:27,059 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 516 transitions. [2023-11-19 08:05:27,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 516 transitions. [2023-11-19 08:05:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 08:05:27,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:27,074 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:27,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:27,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:27,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash 94063937, now seen corresponding path program 1 times [2023-11-19 08:05:27,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:27,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864304271] [2023-11-19 08:05:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:27,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:27,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:27,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970597042] [2023-11-19 08:05:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:27,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:27,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:27,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:05:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:27,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:27,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:29,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:29,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864304271] [2023-11-19 08:05:29,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:29,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970597042] [2023-11-19 08:05:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970597042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:29,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:29,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992107218] [2023-11-19 08:05:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:29,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:29,233 INFO L87 Difference]: Start difference. First operand 321 states and 516 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:29,592 INFO L93 Difference]: Finished difference Result 672 states and 1090 transitions. [2023-11-19 08:05:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-19 08:05:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:29,598 INFO L225 Difference]: With dead ends: 672 [2023-11-19 08:05:29,599 INFO L226 Difference]: Without dead ends: 449 [2023-11-19 08:05:29,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:05:29,602 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 210 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:29,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1188 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:05:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-19 08:05:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 423. [2023-11-19 08:05:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 308 states have (on average 1.5064935064935066) internal successors, (464), 308 states have internal predecessors, (464), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 08:05:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 688 transitions. [2023-11-19 08:05:29,647 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 688 transitions. Word has length 370 [2023-11-19 08:05:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:29,649 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 688 transitions. [2023-11-19 08:05:29,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 688 transitions. [2023-11-19 08:05:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:05:29,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:29,654 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:29,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 08:05:29,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:29,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:29,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2110775538, now seen corresponding path program 1 times [2023-11-19 08:05:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:29,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637117157] [2023-11-19 08:05:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:29,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:29,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395133209] [2023-11-19 08:05:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:29,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:30,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:05:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:30,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:30,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:31,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637117157] [2023-11-19 08:05:31,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395133209] [2023-11-19 08:05:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395133209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:31,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913749896] [2023-11-19 08:05:31,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:31,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:05:31,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:05:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:05:31,027 INFO L87 Difference]: Start difference. First operand 423 states and 688 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:32,041 INFO L93 Difference]: Finished difference Result 1311 states and 2115 transitions. [2023-11-19 08:05:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:05:32,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 372 [2023-11-19 08:05:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:32,053 INFO L225 Difference]: With dead ends: 1311 [2023-11-19 08:05:32,053 INFO L226 Difference]: Without dead ends: 1033 [2023-11-19 08:05:32,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:05:32,056 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 1546 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:32,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1546 Valid, 1557 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:05:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2023-11-19 08:05:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 776. [2023-11-19 08:05:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 567 states have (on average 1.4797178130511464) internal successors, (839), 568 states have internal predecessors, (839), 202 states have call successors, (202), 6 states have call predecessors, (202), 6 states have return successors, (202), 201 states have call predecessors, (202), 202 states have call successors, (202) [2023-11-19 08:05:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1243 transitions. [2023-11-19 08:05:32,201 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1243 transitions. Word has length 372 [2023-11-19 08:05:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1243 transitions. [2023-11-19 08:05:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1243 transitions. [2023-11-19 08:05:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:05:32,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:32,208 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:32,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:32,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:32,424 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:32,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:32,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1936045264, now seen corresponding path program 1 times [2023-11-19 08:05:32,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:32,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255242272] [2023-11-19 08:05:32,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:32,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:32,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:32,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067651651] [2023-11-19 08:05:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:32,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:32,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:32,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:05:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:32,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:32,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:33,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:33,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255242272] [2023-11-19 08:05:33,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067651651] [2023-11-19 08:05:33,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067651651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:33,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:33,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:33,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329690958] [2023-11-19 08:05:33,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:05:33,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:33,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:05:33,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:05:33,540 INFO L87 Difference]: Start difference. First operand 776 states and 1243 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:34,261 INFO L93 Difference]: Finished difference Result 2490 states and 3990 transitions. [2023-11-19 08:05:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 08:05:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 372 [2023-11-19 08:05:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:34,282 INFO L225 Difference]: With dead ends: 2490 [2023-11-19 08:05:34,282 INFO L226 Difference]: Without dead ends: 1816 [2023-11-19 08:05:34,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:05:34,288 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1475 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:34,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 2002 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:05:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2023-11-19 08:05:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1442. [2023-11-19 08:05:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1083 states have (on average 1.4967682363804247) internal successors, (1621), 1085 states have internal predecessors, (1621), 348 states have call successors, (348), 10 states have call predecessors, (348), 10 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 08:05:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2317 transitions. [2023-11-19 08:05:34,550 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2317 transitions. Word has length 372 [2023-11-19 08:05:34,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:34,553 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 2317 transitions. [2023-11-19 08:05:34,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2317 transitions. [2023-11-19 08:05:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:05:34,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:34,560 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:34,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:34,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:34,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1189332654, now seen corresponding path program 1 times [2023-11-19 08:05:34,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:34,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933757785] [2023-11-19 08:05:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:34,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:34,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:34,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962880785] [2023-11-19 08:05:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:34,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:34,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:34,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:05:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:05:35,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2013 proven. 132 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2023-11-19 08:05:35,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 33 proven. 132 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-19 08:05:36,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:36,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933757785] [2023-11-19 08:05:36,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:36,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962880785] [2023-11-19 08:05:36,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962880785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:36,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:36,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 08:05:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675693309] [2023-11-19 08:05:36,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:05:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:05:36,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:05:36,218 INFO L87 Difference]: Start difference. First operand 1442 states and 2317 transitions. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-19 08:05:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:36,731 INFO L93 Difference]: Finished difference Result 2830 states and 4519 transitions. [2023-11-19 08:05:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:05:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 372 [2023-11-19 08:05:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:36,746 INFO L225 Difference]: With dead ends: 2830 [2023-11-19 08:05:36,746 INFO L226 Difference]: Without dead ends: 1490 [2023-11-19 08:05:36,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 736 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:05:36,752 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 306 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:36,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 627 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:05:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2023-11-19 08:05:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1470. [2023-11-19 08:05:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1104 states have (on average 1.4655797101449275) internal successors, (1618), 1106 states have internal predecessors, (1618), 348 states have call successors, (348), 17 states have call predecessors, (348), 17 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 08:05:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2314 transitions. [2023-11-19 08:05:36,913 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2314 transitions. Word has length 372 [2023-11-19 08:05:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:36,914 INFO L495 AbstractCegarLoop]: Abstraction has 1470 states and 2314 transitions. [2023-11-19 08:05:36,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-19 08:05:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2314 transitions. [2023-11-19 08:05:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:05:36,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:36,919 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:36,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:37,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:05:37,144 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:37,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1054650644, now seen corresponding path program 1 times [2023-11-19 08:05:37,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:37,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857543397] [2023-11-19 08:05:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:37,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:37,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:37,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237588119] [2023-11-19 08:05:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:37,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:37,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:37,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:05:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:37,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:05:37,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:37,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:37,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:37,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857543397] [2023-11-19 08:05:37,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:37,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237588119] [2023-11-19 08:05:37,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237588119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:37,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:37,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:37,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907180411] [2023-11-19 08:05:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:37,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:37,716 INFO L87 Difference]: Start difference. First operand 1470 states and 2314 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:38,432 INFO L93 Difference]: Finished difference Result 4214 states and 6616 transitions. [2023-11-19 08:05:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:05:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 372 [2023-11-19 08:05:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:38,454 INFO L225 Difference]: With dead ends: 4214 [2023-11-19 08:05:38,454 INFO L226 Difference]: Without dead ends: 2850 [2023-11-19 08:05:38,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:38,460 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 569 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:38,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 980 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2023-11-19 08:05:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2044. [2023-11-19 08:05:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1674 states have (on average 1.4970131421744326) internal successors, (2506), 1676 states have internal predecessors, (2506), 348 states have call successors, (348), 21 states have call predecessors, (348), 21 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 08:05:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3202 transitions. [2023-11-19 08:05:38,717 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3202 transitions. Word has length 372 [2023-11-19 08:05:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:38,718 INFO L495 AbstractCegarLoop]: Abstraction has 2044 states and 3202 transitions. [2023-11-19 08:05:38,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3202 transitions. [2023-11-19 08:05:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:05:38,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:38,724 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:38,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:38,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:05:38,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:38,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:38,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1407739026, now seen corresponding path program 1 times [2023-11-19 08:05:38,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:38,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954741281] [2023-11-19 08:05:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:39,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:39,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768692253] [2023-11-19 08:05:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:39,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:39,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:39,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:05:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:39,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:05:39,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:39,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:39,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954741281] [2023-11-19 08:05:39,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768692253] [2023-11-19 08:05:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768692253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:39,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:39,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762610503] [2023-11-19 08:05:39,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:39,495 INFO L87 Difference]: Start difference. First operand 2044 states and 3202 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:39,768 INFO L93 Difference]: Finished difference Result 5142 states and 8012 transitions. [2023-11-19 08:05:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 372 [2023-11-19 08:05:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:39,790 INFO L225 Difference]: With dead ends: 5142 [2023-11-19 08:05:39,790 INFO L226 Difference]: Without dead ends: 3192 [2023-11-19 08:05:39,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:39,798 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 198 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:39,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 747 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2023-11-19 08:05:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 2530. [2023-11-19 08:05:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2160 states have (on average 1.499074074074074) internal successors, (3238), 2162 states have internal predecessors, (3238), 348 states have call successors, (348), 21 states have call predecessors, (348), 21 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 08:05:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3934 transitions. [2023-11-19 08:05:40,079 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3934 transitions. Word has length 372 [2023-11-19 08:05:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:40,080 INFO L495 AbstractCegarLoop]: Abstraction has 2530 states and 3934 transitions. [2023-11-19 08:05:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3934 transitions. [2023-11-19 08:05:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:05:40,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:40,086 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:40,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:40,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:40,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:40,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:40,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1866159916, now seen corresponding path program 1 times [2023-11-19 08:05:40,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:40,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885524416] [2023-11-19 08:05:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:40,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:40,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833806965] [2023-11-19 08:05:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:40,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:40,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:40,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:05:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:40,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:40,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:41,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:41,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885524416] [2023-11-19 08:05:41,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833806965] [2023-11-19 08:05:41,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833806965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:41,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:41,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:05:41,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765465797] [2023-11-19 08:05:41,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:41,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:41,219 INFO L87 Difference]: Start difference. First operand 2530 states and 3934 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:41,839 INFO L93 Difference]: Finished difference Result 4748 states and 7362 transitions. [2023-11-19 08:05:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 372 [2023-11-19 08:05:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:41,856 INFO L225 Difference]: With dead ends: 4748 [2023-11-19 08:05:41,857 INFO L226 Difference]: Without dead ends: 2324 [2023-11-19 08:05:41,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:41,864 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 891 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:41,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 1010 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2023-11-19 08:05:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2174. [2023-11-19 08:05:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1804 states have (on average 1.482261640798226) internal successors, (2674), 1806 states have internal predecessors, (2674), 348 states have call successors, (348), 21 states have call predecessors, (348), 21 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 08:05:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3370 transitions. [2023-11-19 08:05:42,091 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3370 transitions. Word has length 372 [2023-11-19 08:05:42,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:42,092 INFO L495 AbstractCegarLoop]: Abstraction has 2174 states and 3370 transitions. [2023-11-19 08:05:42,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:42,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3370 transitions. [2023-11-19 08:05:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-19 08:05:42,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:42,099 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:42,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:42,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:42,324 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:42,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2123708933, now seen corresponding path program 1 times [2023-11-19 08:05:42,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:42,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969356828] [2023-11-19 08:05:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:42,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:42,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224837368] [2023-11-19 08:05:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:42,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:42,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:42,403 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:42,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:05:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:05:42,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:45,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:45,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:45,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969356828] [2023-11-19 08:05:45,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224837368] [2023-11-19 08:05:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224837368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 08:05:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826228662] [2023-11-19 08:05:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:05:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:45,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:05:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:05:45,038 INFO L87 Difference]: Start difference. First operand 2174 states and 3370 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 8 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:47,825 INFO L93 Difference]: Finished difference Result 7228 states and 11151 transitions. [2023-11-19 08:05:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:05:47,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 8 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-19 08:05:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:47,859 INFO L225 Difference]: With dead ends: 7228 [2023-11-19 08:05:47,859 INFO L226 Difference]: Without dead ends: 5160 [2023-11-19 08:05:47,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:05:47,867 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 1717 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2810 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:47,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 2810 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 08:05:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2023-11-19 08:05:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4236. [2023-11-19 08:05:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 3556 states have (on average 1.482564679415073) internal successors, (5272), 3560 states have internal predecessors, (5272), 640 states have call successors, (640), 39 states have call predecessors, (640), 39 states have return successors, (640), 636 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-19 08:05:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 6552 transitions. [2023-11-19 08:05:48,365 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 6552 transitions. Word has length 373 [2023-11-19 08:05:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:48,366 INFO L495 AbstractCegarLoop]: Abstraction has 4236 states and 6552 transitions. [2023-11-19 08:05:48,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 8 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:05:48,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 6552 transitions. [2023-11-19 08:05:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-19 08:05:48,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:48,373 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:48,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:48,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:05:48,600 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:48,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:48,601 INFO L85 PathProgramCache]: Analyzing trace with hash -785054969, now seen corresponding path program 1 times [2023-11-19 08:05:48,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:48,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780749338] [2023-11-19 08:05:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:48,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:48,673 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878431619] [2023-11-19 08:05:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:48,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:48,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:48,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:48,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:05:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:49,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:05:49,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2240 proven. 48 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-19 08:05:50,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 276 proven. 51 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2023-11-19 08:05:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:51,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780749338] [2023-11-19 08:05:51,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:51,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878431619] [2023-11-19 08:05:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878431619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:51,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-11-19 08:05:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356482868] [2023-11-19 08:05:51,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 08:05:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 08:05:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:05:51,565 INFO L87 Difference]: Start difference. First operand 4236 states and 6552 transitions. Second operand has 24 states, 23 states have (on average 6.913043478260869) internal successors, (159), 24 states have internal predecessors, (159), 7 states have call successors, (112), 5 states have call predecessors, (112), 8 states have return successors, (112), 5 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-19 08:05:57,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:57,413 INFO L93 Difference]: Finished difference Result 19648 states and 30278 transitions. [2023-11-19 08:05:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 08:05:57,414 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.913043478260869) internal successors, (159), 24 states have internal predecessors, (159), 7 states have call successors, (112), 5 states have call predecessors, (112), 8 states have return successors, (112), 5 states have call predecessors, (112), 7 states have call successors, (112) Word has length 373 [2023-11-19 08:05:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:57,494 INFO L225 Difference]: With dead ends: 19648 [2023-11-19 08:05:57,494 INFO L226 Difference]: Without dead ends: 15518 [2023-11-19 08:05:57,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 725 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1219, Invalid=3473, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 08:05:57,511 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 4126 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 2732 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 3307 SdHoareTripleChecker+Invalid, 3847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 2732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:57,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4129 Valid, 3307 Invalid, 3847 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1115 Valid, 2732 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 08:05:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15518 states. [2023-11-19 08:05:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15518 to 8640. [2023-11-19 08:05:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8640 states, 7313 states have (on average 1.471489128948448) internal successors, (10761), 7321 states have internal predecessors, (10761), 1224 states have call successors, (1224), 102 states have call predecessors, (1224), 102 states have return successors, (1224), 1216 states have call predecessors, (1224), 1224 states have call successors, (1224) [2023-11-19 08:05:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8640 states to 8640 states and 13209 transitions. [2023-11-19 08:05:58,757 INFO L78 Accepts]: Start accepts. Automaton has 8640 states and 13209 transitions. Word has length 373 [2023-11-19 08:05:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:58,758 INFO L495 AbstractCegarLoop]: Abstraction has 8640 states and 13209 transitions. [2023-11-19 08:05:58,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.913043478260869) internal successors, (159), 24 states have internal predecessors, (159), 7 states have call successors, (112), 5 states have call predecessors, (112), 8 states have return successors, (112), 5 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-19 08:05:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8640 states and 13209 transitions. [2023-11-19 08:05:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-19 08:05:58,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:58,766 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:58,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:58,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:58,990 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:58,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash -566200251, now seen corresponding path program 1 times [2023-11-19 08:05:58,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:58,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952363753] [2023-11-19 08:05:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:58,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:59,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153713734] [2023-11-19 08:05:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:59,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:59,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:05:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:59,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:05:59,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:05:59,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952363753] [2023-11-19 08:05:59,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153713734] [2023-11-19 08:05:59,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153713734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:59,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347698933] [2023-11-19 08:05:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:59,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:59,900 INFO L87 Difference]: Start difference. First operand 8640 states and 13209 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:06:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:00,521 INFO L93 Difference]: Finished difference Result 17164 states and 26251 transitions. [2023-11-19 08:06:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-19 08:06:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:00,559 INFO L225 Difference]: With dead ends: 17164 [2023-11-19 08:06:00,560 INFO L226 Difference]: Without dead ends: 8642 [2023-11-19 08:06:00,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:00,581 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 144 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:00,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 906 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2023-11-19 08:06:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 8640. [2023-11-19 08:06:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8640 states, 7313 states have (on average 1.4638315328866403) internal successors, (10705), 7321 states have internal predecessors, (10705), 1224 states have call successors, (1224), 102 states have call predecessors, (1224), 102 states have return successors, (1224), 1216 states have call predecessors, (1224), 1224 states have call successors, (1224) [2023-11-19 08:06:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8640 states to 8640 states and 13153 transitions. [2023-11-19 08:06:01,736 INFO L78 Accepts]: Start accepts. Automaton has 8640 states and 13153 transitions. Word has length 373 [2023-11-19 08:06:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:01,737 INFO L495 AbstractCegarLoop]: Abstraction has 8640 states and 13153 transitions. [2023-11-19 08:06:01,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:06:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8640 states and 13153 transitions. [2023-11-19 08:06:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-19 08:06:01,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:01,745 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:01,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:01,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:01,960 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:01,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2039823303, now seen corresponding path program 1 times [2023-11-19 08:06:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921015266] [2023-11-19 08:06:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:02,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188373480] [2023-11-19 08:06:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:02,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:02,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51e207e1-ee1f-40a6-bf9a-92e8f9d3dd2f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:06:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:02,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:06:02,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3129 proven. 78 refuted. 0 times theorem prover too weak. 2953 trivial. 0 not checked. [2023-11-19 08:06:02,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:06:03,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:03,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921015266] [2023-11-19 08:06:03,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:03,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188373480] [2023-11-19 08:06:03,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188373480] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:06:03,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:06:03,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-11-19 08:06:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841890086] [2023-11-19 08:06:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:06:03,237 INFO L87 Difference]: Start difference. First operand 8640 states and 13153 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56)