./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX --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 f341d659968a9193c951bd8eec2bcf2a384f8494a1f57cb579da98ce5ebdb030 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:54:48,740 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:54:48,807 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 17:54:48,812 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:54:48,813 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:54:48,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:54:48,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:54:48,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:54:48,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:54:48,853 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:54:48,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:54:48,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:54:48,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:54:48,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:54:48,857 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:54:48,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:54:48,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 17:54:48,858 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:54:48,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:54:48,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:54:48,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:54:48,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 17:54:48,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:54:48,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 17:54:48,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:54:48,862 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:54:48,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 17:54:48,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:54:48,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:54:48,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:54:48,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:54:48,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:54:48,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:54:48,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:54:48,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:54:48,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 17:54:48,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:54:48,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:54:48,868 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:54:48,868 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:54:48,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:54:48,869 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:54:48,869 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_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f341d659968a9193c951bd8eec2bcf2a384f8494a1f57cb579da98ce5ebdb030 [2024-11-08 17:54:49,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:54:49,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:54:49,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:54:49,299 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:54:49,301 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:54:49,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/reducercommutativity/sum10-1.i Unable to find full path for "g++" [2024-11-08 17:54:51,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:54:51,754 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:54:51,754 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/sv-benchmarks/c/reducercommutativity/sum10-1.i [2024-11-08 17:54:51,768 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/data/57805303f/c80b7f04bcd740439bbb47c4add544e4/FLAGc4f2fd7df [2024-11-08 17:54:51,786 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/data/57805303f/c80b7f04bcd740439bbb47c4add544e4 [2024-11-08 17:54:51,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:54:51,791 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:54:51,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:54:51,793 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:54:51,799 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:54:51,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:54:51" (1/1) ... [2024-11-08 17:54:51,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23553037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:51, skipping insertion in model container [2024-11-08 17:54:51,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:54:51" (1/1) ... [2024-11-08 17:54:51,831 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:54:52,174 WARN L250 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_0c4cddf9-437e-4db4-afec-1daf9f5d605f/sv-benchmarks/c/reducercommutativity/sum10-1.i[1277,1290] [2024-11-08 17:54:52,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:54:52,197 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:54:52,240 WARN L250 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_0c4cddf9-437e-4db4-afec-1daf9f5d605f/sv-benchmarks/c/reducercommutativity/sum10-1.i[1277,1290] [2024-11-08 17:54:52,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:54:52,272 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:54:52,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52 WrapperNode [2024-11-08 17:54:52,273 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:54:52,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:54:52,276 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:54:52,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:54:52,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,344 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-08 17:54:52,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:54:52,348 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:54:52,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:54:52,349 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:54:52,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,370 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,397 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-11-08 17:54:52,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,413 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:54:52,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:54:52,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:54:52,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:54:52,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (1/1) ... [2024-11-08 17:54:52,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:54:52,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:52,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:54:52,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:54:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:54:52,543 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-08 17:54:52,543 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-08 17:54:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:54:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:54:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 17:54:52,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:54:52,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:54:52,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:54:52,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:54:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:54:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:54:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 17:54:52,674 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:54:52,677 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:54:52,957 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-08 17:54:52,957 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:54:52,975 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:54:52,975 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:54:52,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:54:52 BoogieIcfgContainer [2024-11-08 17:54:52,976 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:54:52,982 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:54:52,982 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:54:52,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:54:52,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:54:51" (1/3) ... [2024-11-08 17:54:52,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bb725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:54:52, skipping insertion in model container [2024-11-08 17:54:52,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:54:52" (2/3) ... [2024-11-08 17:54:52,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70bb725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:54:52, skipping insertion in model container [2024-11-08 17:54:52,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:54:52" (3/3) ... [2024-11-08 17:54:52,994 INFO L112 eAbstractionObserver]: Analyzing ICFG sum10-1.i [2024-11-08 17:54:53,018 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:54:53,018 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 17:54:53,100 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:54:53,108 INFO L333 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, 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;@31d9218e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:54:53,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 17:54:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-08 17:54:53,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:53,123 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:53,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:53,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:53,129 INFO L85 PathProgramCache]: Analyzing trace with hash -289690363, now seen corresponding path program 1 times [2024-11-08 17:54:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827759784] [2024-11-08 17:54:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:53,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:53,632 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 17:54:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:53,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 17:54:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:53,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 17:54:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 17:54:53,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827759784] [2024-11-08 17:54:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827759784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:53,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013418603] [2024-11-08 17:54:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:53,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:53,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:53,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:53,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:54:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:53,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 17:54:53,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:54:53,893 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:54:53,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013418603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:54:53,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:54:53,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-08 17:54:53,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946925784] [2024-11-08 17:54:53,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:54:53,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:54:53,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:53,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:54:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:54:53,947 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:54:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:54,009 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2024-11-08 17:54:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:54:54,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-08 17:54:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:54,024 INFO L225 Difference]: With dead ends: 52 [2024-11-08 17:54:54,024 INFO L226 Difference]: Without dead ends: 25 [2024-11-08 17:54:54,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:54:54,035 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:54,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:54:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-08 17:54:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-08 17:54:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-08 17:54:54,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 29 [2024-11-08 17:54:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:54,099 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-08 17:54:54,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 17:54:54,100 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-08 17:54:54,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 17:54:54,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:54,103 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:54,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:54:54,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-08 17:54:54,308 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:54,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:54,309 INFO L85 PathProgramCache]: Analyzing trace with hash -422496800, now seen corresponding path program 1 times [2024-11-08 17:54:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:54,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462924453] [2024-11-08 17:54:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:54,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:54,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 17:54:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:54,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 17:54:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:54,551 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 17:54:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 17:54:54,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:54,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462924453] [2024-11-08 17:54:54,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462924453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:54,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683517606] [2024-11-08 17:54:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:54,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:54,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:54,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:54,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:54:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:54,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 17:54:54,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:54:54,695 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:54:54,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683517606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:54:54,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:54:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-08 17:54:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290968522] [2024-11-08 17:54:54,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:54:54,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:54:54,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:54:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:54:54,699 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:54:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:54,718 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2024-11-08 17:54:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:54:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-08 17:54:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:54,720 INFO L225 Difference]: With dead ends: 44 [2024-11-08 17:54:54,720 INFO L226 Difference]: Without dead ends: 27 [2024-11-08 17:54:54,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:54:54,722 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:54,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:54:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-08 17:54:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-08 17:54:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-08 17:54:54,730 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 31 [2024-11-08 17:54:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:54,730 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-08 17:54:54,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:54:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-08 17:54:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 17:54:54,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:54,734 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:54,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:54:54,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:54,935 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:54,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1325285051, now seen corresponding path program 1 times [2024-11-08 17:54:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:54,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121495307] [2024-11-08 17:54:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:54,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,087 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 17:54:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 17:54:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 17:54:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 17:54:55,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121495307] [2024-11-08 17:54:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121495307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:55,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721672853] [2024-11-08 17:54:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:55,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:55,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:55,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:55,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:54:55,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 17:54:55,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 17:54:55,305 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:54:55,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721672853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:54:55,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:54:55,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-08 17:54:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489861010] [2024-11-08 17:54:55,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:54:55,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:54:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:54:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:54:55,309 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:54:55,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:55,330 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-11-08 17:54:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:54:55,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-08 17:54:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:55,332 INFO L225 Difference]: With dead ends: 43 [2024-11-08 17:54:55,332 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 17:54:55,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:54:55,334 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:55,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:54:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 17:54:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-08 17:54:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-08 17:54:55,342 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 37 [2024-11-08 17:54:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:55,344 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-08 17:54:55,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-08 17:54:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-08 17:54:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-08 17:54:55,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:55,346 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:55,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:54:55,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:55,547 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:55,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1517292278, now seen corresponding path program 1 times [2024-11-08 17:54:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011814030] [2024-11-08 17:54:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:55,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 17:54:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,739 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 17:54:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 17:54:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 17:54:55,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:55,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011814030] [2024-11-08 17:54:55,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011814030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678701180] [2024-11-08 17:54:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:55,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:55,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:55,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:55,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:54:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:55,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 17:54:55,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-08 17:54:55,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:54:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-08 17:54:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678701180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:54:56,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:54:56,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-11-08 17:54:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483422548] [2024-11-08 17:54:56,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:54:56,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 17:54:56,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 17:54:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:54:56,040 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-08 17:54:56,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:56,135 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2024-11-08 17:54:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:54:56,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2024-11-08 17:54:56,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:56,137 INFO L225 Difference]: With dead ends: 59 [2024-11-08 17:54:56,138 INFO L226 Difference]: Without dead ends: 36 [2024-11-08 17:54:56,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:54:56,139 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:56,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 113 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:54:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-08 17:54:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-08 17:54:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-11-08 17:54:56,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 39 [2024-11-08 17:54:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:56,157 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-11-08 17:54:56,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-08 17:54:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-11-08 17:54:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-08 17:54:56,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:56,159 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:56,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 17:54:56,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:56,361 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:56,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2140692770, now seen corresponding path program 2 times [2024-11-08 17:54:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:56,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621966499] [2024-11-08 17:54:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:56,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:56,503 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-08 17:54:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:56,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-08 17:54:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:56,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-11-08 17:54:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-11-08 17:54:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621966499] [2024-11-08 17:54:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621966499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:56,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733688159] [2024-11-08 17:54:56,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:54:56,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:56,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:56,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:56,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:54:56,668 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:54:56,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:54:56,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:54:56,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-08 17:54:56,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:54:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-08 17:54:56,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733688159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:54:56,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:54:56,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-08 17:54:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353727872] [2024-11-08 17:54:56,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:54:56,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:54:56,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:54:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:54:56,909 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 17:54:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:57,004 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2024-11-08 17:54:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:54:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-11-08 17:54:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:57,006 INFO L225 Difference]: With dead ends: 75 [2024-11-08 17:54:57,006 INFO L226 Difference]: Without dead ends: 50 [2024-11-08 17:54:57,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:54:57,007 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:57,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 153 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:54:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-08 17:54:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-08 17:54:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2024-11-08 17:54:57,015 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 51 [2024-11-08 17:54:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:57,016 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2024-11-08 17:54:57,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-08 17:54:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2024-11-08 17:54:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-08 17:54:57,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:57,018 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:57,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:54:57,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:57,219 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:57,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash 627223935, now seen corresponding path program 3 times [2024-11-08 17:54:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:57,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754696409] [2024-11-08 17:54:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:57,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:57,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 17:54:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:57,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-08 17:54:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:57,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-08 17:54:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-08 17:54:57,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754696409] [2024-11-08 17:54:57,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754696409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076714261] [2024-11-08 17:54:57,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:54:57,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:57,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:57,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:54:57,500 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 17:54:57,501 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:54:57,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:54:57,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-08 17:54:57,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:54:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-08 17:54:57,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076714261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:54:57,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:54:57,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-08 17:54:57,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169995574] [2024-11-08 17:54:57,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:54:57,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 17:54:57,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:57,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 17:54:57,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:54:57,594 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 17:54:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:57,641 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2024-11-08 17:54:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:54:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2024-11-08 17:54:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:57,643 INFO L225 Difference]: With dead ends: 82 [2024-11-08 17:54:57,643 INFO L226 Difference]: Without dead ends: 57 [2024-11-08 17:54:57,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-08 17:54:57,645 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:57,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 122 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:54:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-08 17:54:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-08 17:54:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-11-08 17:54:57,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 65 [2024-11-08 17:54:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:57,658 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-11-08 17:54:57,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-08 17:54:57,659 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-11-08 17:54:57,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-08 17:54:57,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:57,660 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:57,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:54:57,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:57,861 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:57,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1656525205, now seen corresponding path program 4 times [2024-11-08 17:54:57,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:57,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722708286] [2024-11-08 17:54:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:58,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 17:54:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:58,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-08 17:54:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:58,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-11-08 17:54:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2024-11-08 17:54:58,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722708286] [2024-11-08 17:54:58,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722708286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:58,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528987345] [2024-11-08 17:54:58,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:54:58,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:58,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:58,269 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:58,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:54:58,412 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:54:58,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:54:58,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:54:58,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2024-11-08 17:54:58,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:54:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2024-11-08 17:54:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528987345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:54:58,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:54:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-08 17:54:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072717995] [2024-11-08 17:54:58,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:54:58,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:54:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:54:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:54:58,598 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 17:54:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:58,650 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-11-08 17:54:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:54:58,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 89 [2024-11-08 17:54:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:58,652 INFO L225 Difference]: With dead ends: 97 [2024-11-08 17:54:58,653 INFO L226 Difference]: Without dead ends: 65 [2024-11-08 17:54:58,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:54:58,654 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:58,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:54:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-08 17:54:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-08 17:54:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2024-11-08 17:54:58,663 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 89 [2024-11-08 17:54:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:58,663 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2024-11-08 17:54:58,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 17:54:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2024-11-08 17:54:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-08 17:54:58,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:58,666 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:58,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:54:58,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:58,867 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:58,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -987550889, now seen corresponding path program 5 times [2024-11-08 17:54:58,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:58,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51622337] [2024-11-08 17:54:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:58,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:54:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:59,036 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 17:54:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:59,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-08 17:54:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:59,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-11-08 17:54:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:54:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2024-11-08 17:54:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:54:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51622337] [2024-11-08 17:54:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51622337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:54:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311012925] [2024-11-08 17:54:59,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 17:54:59,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:54:59,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:54:59,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:54:59,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:54:59,553 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2024-11-08 17:54:59,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:54:59,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 17:54:59,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:54:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 450 proven. 4 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2024-11-08 17:54:59,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:54:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2024-11-08 17:54:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311012925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:54:59,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:54:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-08 17:54:59,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463297828] [2024-11-08 17:54:59,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:54:59,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 17:54:59,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:54:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 17:54:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:54:59,687 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:54:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:54:59,748 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2024-11-08 17:54:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:54:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 113 [2024-11-08 17:54:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:54:59,751 INFO L225 Difference]: With dead ends: 103 [2024-11-08 17:54:59,755 INFO L226 Difference]: Without dead ends: 72 [2024-11-08 17:54:59,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 17:54:59,757 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 17:54:59,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 17:54:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-08 17:54:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-08 17:54:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:54:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-11-08 17:54:59,774 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 113 [2024-11-08 17:54:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:54:59,775 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-11-08 17:54:59,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:54:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-11-08 17:54:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-08 17:54:59,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:54:59,782 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:54:59,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:54:59,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-08 17:54:59,982 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:54:59,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:54:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2147242045, now seen corresponding path program 6 times [2024-11-08 17:54:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:54:59,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149892558] [2024-11-08 17:54:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:54:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:55:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:00,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 17:55:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:00,346 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-08 17:55:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:00,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-11-08 17:55:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2024-11-08 17:55:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:55:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149892558] [2024-11-08 17:55:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149892558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:55:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760225736] [2024-11-08 17:55:00,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 17:55:00,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:55:00,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:55:00,382 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:55:00,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:55:00,759 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-08 17:55:00,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:55:00,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:55:00,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:55:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 450 proven. 36 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2024-11-08 17:55:00,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:55:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2024-11-08 17:55:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760225736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:55:00,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:55:00,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-08 17:55:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755955841] [2024-11-08 17:55:00,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:55:00,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:55:00,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:55:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:55:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:55:00,984 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:55:01,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 17:55:01,052 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2024-11-08 17:55:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:55:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 121 [2024-11-08 17:55:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 17:55:01,056 INFO L225 Difference]: With dead ends: 109 [2024-11-08 17:55:01,057 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 17:55:01,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 240 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:55:01,058 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 17:55:01,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 67 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 17:55:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 17:55:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-08 17:55:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-08 17:55:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-11-08 17:55:01,079 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 121 [2024-11-08 17:55:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 17:55:01,080 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-11-08 17:55:01,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 17:55:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-11-08 17:55:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-08 17:55:01,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 17:55:01,083 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:55:01,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:55:01,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4cddf9-437e-4db4-afec-1daf9f5d605f/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-08 17:55:01,287 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 17:55:01,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:55:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1596081716, now seen corresponding path program 7 times [2024-11-08 17:55:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:55:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041111546] [2024-11-08 17:55:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:55:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:55:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:32,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 17:55:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:35,186 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-08 17:55:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:55:36,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-11-08 17:55:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat