./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/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_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/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_0829fb4e-f572-46bb-92bb-af68c6181f9c/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 db44bcd2632ea44e8f4cb990cbfca281afcea3a1e6019a6e92bc74bb29013bf8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:30,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:30,586 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:30,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:30,593 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:30,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:30,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:30,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:30,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:30,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:30,623 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:30,624 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:30,624 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:30,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:30,626 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:30,626 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:30,627 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:30,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:30,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:30,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:30,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:30,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:30,630 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:30,631 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:30,631 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:30,632 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:30,632 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:30,633 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:30,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:30,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:30,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:30,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:30,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:30,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:30,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:30,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:30,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:30,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:30,646 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:30,647 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_0829fb4e-f572-46bb-92bb-af68c6181f9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db44bcd2632ea44e8f4cb990cbfca281afcea3a1e6019a6e92bc74bb29013bf8 [2023-11-19 07:55:30,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:30,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:30,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:30,938 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:30,938 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:30,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-cav19/array_doub_access_init_const.c [2023-11-19 07:55:34,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:34,463 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:34,464 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c [2023-11-19 07:55:34,474 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/data/c2528b1b0/fba0c71f884c461683c030de07449913/FLAG8d546bdd2 [2023-11-19 07:55:34,494 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/data/c2528b1b0/fba0c71f884c461683c030de07449913 [2023-11-19 07:55:34,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:34,505 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:34,507 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:34,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:34,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:34,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,518 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71063e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34, skipping insertion in model container [2023-11-19 07:55:34,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,544 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:34,744 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_0829fb4e-f572-46bb-92bb-af68c6181f9c/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c[419,432] [2023-11-19 07:55:34,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:34,776 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:34,793 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_0829fb4e-f572-46bb-92bb-af68c6181f9c/sv-benchmarks/c/array-cav19/array_doub_access_init_const.c[419,432] [2023-11-19 07:55:34,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:34,817 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:34,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34 WrapperNode [2023-11-19 07:55:34,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:34,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:34,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:34,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:34,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,852 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-11-19 07:55:34,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:34,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:34,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:34,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:34,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,889 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:34,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:34,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:34,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:34,893 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (1/1) ... [2023-11-19 07:55:34,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:34,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:34,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:55:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:55:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:34,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:55:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:55:35,035 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:35,038 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:35,167 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:35,175 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:35,175 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:55:35,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:35 BoogieIcfgContainer [2023-11-19 07:55:35,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:35,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:35,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:35,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:35,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:34" (1/3) ... [2023-11-19 07:55:35,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adaeb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:35, skipping insertion in model container [2023-11-19 07:55:35,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:34" (2/3) ... [2023-11-19 07:55:35,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adaeb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:35, skipping insertion in model container [2023-11-19 07:55:35,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:35" (3/3) ... [2023-11-19 07:55:35,190 INFO L112 eAbstractionObserver]: Analyzing ICFG array_doub_access_init_const.c [2023-11-19 07:55:35,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:35,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:35,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:35,265 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;@1672fc26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:35,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:55:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 07:55:35,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:35,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:35,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:35,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2023-11-19 07:55:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:35,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522267351] [2023-11-19 07:55:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:35,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:35,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522267351] [2023-11-19 07:55:35,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522267351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:35,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:35,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778391258] [2023-11-19 07:55:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:35,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:35,582 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:35,624 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-19 07:55:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 07:55:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:35,635 INFO L225 Difference]: With dead ends: 28 [2023-11-19 07:55:35,635 INFO L226 Difference]: Without dead ends: 13 [2023-11-19 07:55:35,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 07:55:35,642 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:35,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-19 07:55:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-19 07:55:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-19 07:55:35,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2023-11-19 07:55:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:35,680 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-19 07:55:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-19 07:55:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 07:55:35,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:35,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:35,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:35,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2023-11-19 07:55:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:35,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116631113] [2023-11-19 07:55:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:35,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:35,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116631113] [2023-11-19 07:55:35,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116631113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236412992] [2023-11-19 07:55:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:35,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:35,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:36,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:55:36,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:36,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236412992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:36,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:36,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-19 07:55:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586507374] [2023-11-19 07:55:36,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:36,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:36,116 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:36,149 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-19 07:55:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:36,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 07:55:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:36,151 INFO L225 Difference]: With dead ends: 25 [2023-11-19 07:55:36,151 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 07:55:36,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:36,153 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:36,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 07:55:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 07:55:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-19 07:55:36,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 9 [2023-11-19 07:55:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:36,160 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-19 07:55:36,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-19 07:55:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:55:36,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:36,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:36,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:36,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:55:36,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:36,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 2 times [2023-11-19 07:55:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422118702] [2023-11-19 07:55:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:36,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422118702] [2023-11-19 07:55:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422118702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049381991] [2023-11-19 07:55:36,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:36,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:36,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:36,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:36,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:36,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:36,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049381991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:36,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:36,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 07:55:36,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122467184] [2023-11-19 07:55:36,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:36,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:55:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:55:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:55:36,922 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:37,017 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-11-19 07:55:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:55:37,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 07:55:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:37,020 INFO L225 Difference]: With dead ends: 37 [2023-11-19 07:55:37,020 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 07:55:37,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:55:37,028 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:37,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 07:55:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-19 07:55:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-11-19 07:55:37,036 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 15 [2023-11-19 07:55:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:37,037 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-11-19 07:55:37,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-11-19 07:55:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 07:55:37,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:37,038 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:37,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:37,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:37,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 3 times [2023-11-19 07:55:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:37,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603309545] [2023-11-19 07:55:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:37,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:37,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603309545] [2023-11-19 07:55:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603309545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:37,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856502740] [2023-11-19 07:55:37,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:37,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:37,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:37,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:38,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-19 07:55:38,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:38,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:55:38,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:38,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:38,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856502740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:38,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:38,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-11-19 07:55:38,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9767519] [2023-11-19 07:55:38,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:38,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 07:55:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 07:55:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:55:38,805 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:38,980 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-11-19 07:55:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:55:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-19 07:55:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:38,985 INFO L225 Difference]: With dead ends: 61 [2023-11-19 07:55:38,985 INFO L226 Difference]: Without dead ends: 54 [2023-11-19 07:55:38,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:55:38,989 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:38,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-19 07:55:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-19 07:55:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-11-19 07:55:39,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 27 [2023-11-19 07:55:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:39,020 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-11-19 07:55:39,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-11-19 07:55:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 07:55:39,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:39,024 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:39,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:39,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:39,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:39,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 4 times [2023-11-19 07:55:39,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:39,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29726985] [2023-11-19 07:55:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:39,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:40,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29726985] [2023-11-19 07:55:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29726985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93854357] [2023-11-19 07:55:40,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:55:40,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:40,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:40,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:51,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:55:51,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:51,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:55:51,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:52,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93854357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:53,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:53,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 71 [2023-11-19 07:55:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153980335] [2023-11-19 07:55:53,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-19 07:55:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:53,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-19 07:55:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-11-19 07:55:53,344 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:53,614 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2023-11-19 07:55:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 07:55:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-19 07:55:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:53,617 INFO L225 Difference]: With dead ends: 109 [2023-11-19 07:55:53,617 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 07:55:53,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-11-19 07:55:53,621 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:53,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:55:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 07:55:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-19 07:55:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2023-11-19 07:55:53,635 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 51 [2023-11-19 07:55:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:53,636 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2023-11-19 07:55:53,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2023-11-19 07:55:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-19 07:55:53,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:53,640 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:53,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:53,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:53,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:53,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash 546272563, now seen corresponding path program 5 times [2023-11-19 07:55:53,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056436671] [2023-11-19 07:55:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:56,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056436671] [2023-11-19 07:55:56,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056436671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290169881] [2023-11-19 07:55:56,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:55:56,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:56,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:56,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0829fb4e-f572-46bb-92bb-af68c6181f9c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process