./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s5if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s5if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU --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 b618695aa08df106816e7defd71220f009a5c8c09539ff7c8c29235c85f2ce8d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:19:00,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:19:00,730 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:19:00,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:19:00,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:19:00,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:19:00,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:19:00,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:19:00,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:19:00,779 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:19:00,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:19:00,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:19:00,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:19:00,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:19:00,782 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:19:00,782 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:19:00,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:19:00,783 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:19:00,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:19:00,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:19:00,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:19:00,789 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:19:00,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:19:00,790 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:19:00,790 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:19:00,790 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:19:00,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:19:00,791 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:19:00,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:19:00,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:19:00,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:19:00,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:19:00,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:00,797 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:19:00,797 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:19:00,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:19:00,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:19:00,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:19:00,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:19:00,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:19:00,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:19:00,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:19:00,802 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_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b618695aa08df106816e7defd71220f009a5c8c09539ff7c8c29235c85f2ce8d [2024-10-31 22:19:01,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:19:01,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:19:01,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:19:01,108 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:19:01,109 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:19:01,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-fpi/s5if.c Unable to find full path for "g++" [2024-10-31 22:19:03,159 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:19:03,335 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:19:03,336 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/sv-benchmarks/c/array-fpi/s5if.c [2024-10-31 22:19:03,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/data/87e128078/f0263c448faf426ea7d2b9807592f288/FLAG1effb7075 [2024-10-31 22:19:03,360 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/data/87e128078/f0263c448faf426ea7d2b9807592f288 [2024-10-31 22:19:03,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:19:03,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:19:03,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:03,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:19:03,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:19:03,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24af18d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03, skipping insertion in model container [2024-10-31 22:19:03,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,396 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:19:03,638 WARN L251 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_50ab0006-7e12-469e-8f94-410cbe4ce12d/sv-benchmarks/c/array-fpi/s5if.c[587,600] [2024-10-31 22:19:03,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:03,677 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:19:03,689 WARN L251 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_50ab0006-7e12-469e-8f94-410cbe4ce12d/sv-benchmarks/c/array-fpi/s5if.c[587,600] [2024-10-31 22:19:03,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:03,721 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:19:03,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03 WrapperNode [2024-10-31 22:19:03,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:03,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:03,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:19:03,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:19:03,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,756 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-10-31 22:19:03,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:03,757 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:19:03,757 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:19:03,757 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:19:03,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,786 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 6, 4]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 3, 1]. [2024-10-31 22:19:03,786 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,786 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,793 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,798 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:19:03,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:19:03,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:19:03,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:19:03,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (1/1) ... [2024-10-31 22:19:03,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:03,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:03,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:19:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:19:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:19:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:19:03,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:19:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:19:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:19:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:19:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:19:03,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:19:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:19:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:19:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:19:03,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:19:03,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:19:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:19:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:19:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:19:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:19:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:19:03,964 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:19:03,968 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:19:04,126 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-31 22:19:04,126 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:19:04,137 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:19:04,138 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:19:04,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:04 BoogieIcfgContainer [2024-10-31 22:19:04,138 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:19:04,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:19:04,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:19:04,145 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:19:04,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:19:03" (1/3) ... [2024-10-31 22:19:04,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1971e34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:04, skipping insertion in model container [2024-10-31 22:19:04,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:03" (2/3) ... [2024-10-31 22:19:04,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1971e34b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:04, skipping insertion in model container [2024-10-31 22:19:04,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:04" (3/3) ... [2024-10-31 22:19:04,148 INFO L112 eAbstractionObserver]: Analyzing ICFG s5if.c [2024-10-31 22:19:04,167 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:19:04,168 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:19:04,239 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:19:04,248 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;@16a829a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:19:04,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:19:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:19:04,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:04,271 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:04,273 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:04,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:04,279 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2024-10-31 22:19:04,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:04,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087964586] [2024-10-31 22:19:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:04,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:04,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087964586] [2024-10-31 22:19:04,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087964586] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:04,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:04,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:19:04,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413302860] [2024-10-31 22:19:04,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:04,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:19:04,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:19:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:19:04,506 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:04,517 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-10-31 22:19:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:19:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:19:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:04,527 INFO L225 Difference]: With dead ends: 34 [2024-10-31 22:19:04,527 INFO L226 Difference]: Without dead ends: 15 [2024-10-31 22:19:04,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:19:04,533 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:04,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:19:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-31 22:19:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-31 22:19:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-10-31 22:19:04,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-10-31 22:19:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:04,575 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-10-31 22:19:04,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-10-31 22:19:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 22:19:04,577 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:04,577 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:04,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:19:04,578 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:04,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2024-10-31 22:19:04,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:04,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634105408] [2024-10-31 22:19:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:04,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:04,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634105408] [2024-10-31 22:19:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634105408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:19:04,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656784289] [2024-10-31 22:19:04,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:04,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:19:04,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:19:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:04,840 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:04,926 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-10-31 22:19:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-31 22:19:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:04,928 INFO L225 Difference]: With dead ends: 28 [2024-10-31 22:19:04,928 INFO L226 Difference]: Without dead ends: 20 [2024-10-31 22:19:04,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:04,930 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:04,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-31 22:19:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2024-10-31 22:19:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-10-31 22:19:04,941 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2024-10-31 22:19:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:04,941 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-10-31 22:19:04,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-10-31 22:19:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:19:04,943 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:04,943 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:04,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:19:04,944 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:04,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2024-10-31 22:19:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:04,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594254006] [2024-10-31 22:19:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:05,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594254006] [2024-10-31 22:19:05,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594254006] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:05,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746667368] [2024-10-31 22:19:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:05,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:05,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:05,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:05,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:19:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:05,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 22:19:05,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:06,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:06,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:19:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:06,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746667368] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:06,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:06,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2024-10-31 22:19:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861311326] [2024-10-31 22:19:06,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:06,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:19:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:19:06,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:19:06,491 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:06,978 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-10-31 22:19:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:19:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 22:19:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:06,980 INFO L225 Difference]: With dead ends: 34 [2024-10-31 22:19:06,980 INFO L226 Difference]: Without dead ends: 30 [2024-10-31 22:19:06,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2024-10-31 22:19:06,983 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:06,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:19:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-31 22:19:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2024-10-31 22:19:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-10-31 22:19:06,994 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2024-10-31 22:19:06,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:06,994 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-10-31 22:19:06,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-10-31 22:19:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 22:19:06,997 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:06,997 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:07,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:07,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:07,198 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:07,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2024-10-31 22:19:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110626422] [2024-10-31 22:19:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:07,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110626422] [2024-10-31 22:19:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110626422] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674753036] [2024-10-31 22:19:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:07,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:07,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:07,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:19:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:07,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:19:07,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:07,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:07,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:07,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-31 22:19:07,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-31 22:19:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:07,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674753036] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:07,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:07,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-10-31 22:19:07,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646079018] [2024-10-31 22:19:07,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:07,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:19:07,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:19:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:19:07,875 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:07,969 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-10-31 22:19:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:19:07,970 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-31 22:19:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:07,971 INFO L225 Difference]: With dead ends: 38 [2024-10-31 22:19:07,971 INFO L226 Difference]: Without dead ends: 26 [2024-10-31 22:19:07,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:19:07,972 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:07,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-31 22:19:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-10-31 22:19:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-10-31 22:19:07,980 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2024-10-31 22:19:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:07,980 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-10-31 22:19:07,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-10-31 22:19:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:19:07,981 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:07,981 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:08,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:19:08,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:08,182 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:08,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2024-10-31 22:19:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:08,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661333404] [2024-10-31 22:19:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:08,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:08,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661333404] [2024-10-31 22:19:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661333404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634682673] [2024-10-31 22:19:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:08,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:19:08,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:19:08,455 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:08,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:19:08,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:08,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:08,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634682673] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:08,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:08,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:19:08,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184096730] [2024-10-31 22:19:08,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:08,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:19:08,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:19:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:19:08,586 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:08,739 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-10-31 22:19:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:19:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-31 22:19:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:08,741 INFO L225 Difference]: With dead ends: 33 [2024-10-31 22:19:08,741 INFO L226 Difference]: Without dead ends: 29 [2024-10-31 22:19:08,741 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:19:08,742 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:08,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-31 22:19:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2024-10-31 22:19:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-31 22:19:08,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2024-10-31 22:19:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:08,750 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-31 22:19:08,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-31 22:19:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-31 22:19:08,751 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:08,751 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:08,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:19:08,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:08,953 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:08,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2024-10-31 22:19:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:08,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062057762] [2024-10-31 22:19:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:09,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062057762] [2024-10-31 22:19:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062057762] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492469353] [2024-10-31 22:19:09,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:19:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:09,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:09,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:09,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:19:09,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:19:09,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:09,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:19:09,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:09,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492469353] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:09,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:09,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 22:19:09,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307384668] [2024-10-31 22:19:09,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:09,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:19:09,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:09,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:19:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:19:09,256 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:09,350 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-10-31 22:19:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:19:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-31 22:19:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:09,352 INFO L225 Difference]: With dead ends: 37 [2024-10-31 22:19:09,352 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 22:19:09,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:19:09,353 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:09,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 22:19:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2024-10-31 22:19:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-10-31 22:19:09,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2024-10-31 22:19:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:09,362 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-10-31 22:19:09,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-10-31 22:19:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 22:19:09,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:09,363 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:09,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:19:09,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:09,565 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:09,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2024-10-31 22:19:09,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:09,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724947622] [2024-10-31 22:19:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:10,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724947622] [2024-10-31 22:19:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724947622] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730064967] [2024-10-31 22:19:10,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:19:10,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:10,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:10,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:19:10,347 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:19:10,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:10,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-31 22:19:10,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:10,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:10,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:19:10,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:19:10,867 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-31 22:19:10,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2024-10-31 22:19:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:10,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:11,301 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-31 22:19:11,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-31 22:19:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730064967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:11,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:11,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2024-10-31 22:19:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628543004] [2024-10-31 22:19:11,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:11,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-31 22:19:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-31 22:19:11,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-10-31 22:19:11,707 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:13,505 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-10-31 22:19:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-31 22:19:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-31 22:19:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:13,509 INFO L225 Difference]: With dead ends: 57 [2024-10-31 22:19:13,510 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:19:13,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2024-10-31 22:19:13,514 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:13,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:19:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:19:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-10-31 22:19:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-10-31 22:19:13,532 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2024-10-31 22:19:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:13,532 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-10-31 22:19:13,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-10-31 22:19:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 22:19:13,534 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:13,534 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:13,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:19:13,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:13,736 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:13,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:13,737 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2024-10-31 22:19:13,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:13,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510475396] [2024-10-31 22:19:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:13,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:14,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510475396] [2024-10-31 22:19:14,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510475396] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:14,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694398571] [2024-10-31 22:19:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:14,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:14,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:19:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:14,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:19:14,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:14,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:14,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:14,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-31 22:19:14,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-31 22:19:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:14,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694398571] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:14,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:14,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-10-31 22:19:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641278869] [2024-10-31 22:19:14,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:14,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:19:14,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:19:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:19:14,331 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:14,479 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-10-31 22:19:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:19:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-31 22:19:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:14,481 INFO L225 Difference]: With dead ends: 62 [2024-10-31 22:19:14,481 INFO L226 Difference]: Without dead ends: 44 [2024-10-31 22:19:14,481 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:19:14,482 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:14,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 63 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-31 22:19:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-10-31 22:19:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-10-31 22:19:14,493 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2024-10-31 22:19:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:14,493 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-10-31 22:19:14,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-10-31 22:19:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 22:19:14,494 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:14,494 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:14,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:19:14,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:14,695 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:14,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2024-10-31 22:19:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507557797] [2024-10-31 22:19:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:14,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507557797] [2024-10-31 22:19:14,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507557797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:14,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887618917] [2024-10-31 22:19:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:19:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:14,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:14,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:19:14,940 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-31 22:19:14,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:14,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:19:14,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:15,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887618917] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:15,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-31 22:19:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724155725] [2024-10-31 22:19:15,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:15,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:19:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:15,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:19:15,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:19:15,114 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:15,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:15,370 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-10-31 22:19:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:19:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-31 22:19:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:15,374 INFO L225 Difference]: With dead ends: 52 [2024-10-31 22:19:15,374 INFO L226 Difference]: Without dead ends: 48 [2024-10-31 22:19:15,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:19:15,376 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:15,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:19:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-31 22:19:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2024-10-31 22:19:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-10-31 22:19:15,391 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2024-10-31 22:19:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:15,391 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-10-31 22:19:15,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-10-31 22:19:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 22:19:15,392 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:15,392 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:15,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:15,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:15,593 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:15,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash -981578845, now seen corresponding path program 2 times [2024-10-31 22:19:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:15,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455913763] [2024-10-31 22:19:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:15,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:15,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:15,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455913763] [2024-10-31 22:19:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455913763] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:15,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312461717] [2024-10-31 22:19:15,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:15,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:15,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:15,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:15,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:19:15,810 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:19:15,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:15,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:19:15,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:15,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:15,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312461717] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:15,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-31 22:19:15,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046750168] [2024-10-31 22:19:15,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:15,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:19:15,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:19:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:19:15,968 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:16,092 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-10-31 22:19:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:19:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-31 22:19:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:16,093 INFO L225 Difference]: With dead ends: 56 [2024-10-31 22:19:16,093 INFO L226 Difference]: Without dead ends: 30 [2024-10-31 22:19:16,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:19:16,094 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:16,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 35 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-31 22:19:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-10-31 22:19:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-10-31 22:19:16,101 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2024-10-31 22:19:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:16,101 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-10-31 22:19:16,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-10-31 22:19:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 22:19:16,102 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:16,102 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:16,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:19:16,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:16,306 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:16,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2024-10-31 22:19:16,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:16,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899263584] [2024-10-31 22:19:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:17,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:17,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899263584] [2024-10-31 22:19:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899263584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:17,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633817089] [2024-10-31 22:19:17,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:19:17,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:17,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:17,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:17,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:19:17,264 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-31 22:19:17,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:17,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-31 22:19:17,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:17,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:17,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:19:17,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:19:17,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:19:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:19:17,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:18,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:19:18,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 13 [2024-10-31 22:19:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:19:18,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633817089] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:18,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:18,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2024-10-31 22:19:18,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331554724] [2024-10-31 22:19:18,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:18,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-31 22:19:18,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-31 22:19:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2024-10-31 22:19:18,577 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:20,416 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-10-31 22:19:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-31 22:19:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-31 22:19:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:20,417 INFO L225 Difference]: With dead ends: 59 [2024-10-31 22:19:20,417 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:19:20,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=453, Invalid=3969, Unknown=0, NotChecked=0, Total=4422 [2024-10-31 22:19:20,420 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:20,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-31 22:19:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:19:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-10-31 22:19:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-10-31 22:19:20,431 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2024-10-31 22:19:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:20,431 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-10-31 22:19:20,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-10-31 22:19:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 22:19:20,432 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:20,432 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:20,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:19:20,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:19:20,633 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:20,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2064736479, now seen corresponding path program 3 times [2024-10-31 22:19:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754120294] [2024-10-31 22:19:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:21,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754120294] [2024-10-31 22:19:21,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754120294] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242297068] [2024-10-31 22:19:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:19:21,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:21,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:21,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:19:21,283 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:19:21,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:21,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:19:21,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:21,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 22:19:21,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:19:21,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-10-31 22:19:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:19:21,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:19:21,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242297068] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:21,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:21,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2024-10-31 22:19:21,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832603755] [2024-10-31 22:19:21,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:21,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:19:21,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:21,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:19:21,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:19:21,761 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:22,506 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2024-10-31 22:19:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-31 22:19:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-31 22:19:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:22,509 INFO L225 Difference]: With dead ends: 47 [2024-10-31 22:19:22,510 INFO L226 Difference]: Without dead ends: 43 [2024-10-31 22:19:22,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2024-10-31 22:19:22,511 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:22,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:19:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-31 22:19:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-10-31 22:19:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-10-31 22:19:22,532 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2024-10-31 22:19:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:22,532 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-10-31 22:19:22,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-10-31 22:19:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-31 22:19:22,533 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:22,533 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:22,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:19:22,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:19:22,734 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:22,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -798779835, now seen corresponding path program 4 times [2024-10-31 22:19:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904393099] [2024-10-31 22:19:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904393099] [2024-10-31 22:19:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904393099] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224285199] [2024-10-31 22:19:22,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:19:22,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:22,901 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:19:22,990 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:19:22,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:22,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:19:22,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:23,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-31 22:19:23,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2024-10-31 22:19:23,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:19:23,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2024-10-31 22:19:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:19:23,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:19:23,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224285199] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:23,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:23,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2024-10-31 22:19:23,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828582219] [2024-10-31 22:19:23,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:23,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-31 22:19:23,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-31 22:19:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-10-31 22:19:23,710 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:25,806 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-31 22:19:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-31 22:19:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-31 22:19:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:25,807 INFO L225 Difference]: With dead ends: 66 [2024-10-31 22:19:25,807 INFO L226 Difference]: Without dead ends: 48 [2024-10-31 22:19:25,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=768, Invalid=3522, Unknown=0, NotChecked=0, Total=4290 [2024-10-31 22:19:25,809 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:25,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 69 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 22:19:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-31 22:19:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2024-10-31 22:19:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-31 22:19:25,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2024-10-31 22:19:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:25,822 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-31 22:19:25,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-31 22:19:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-31 22:19:25,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:25,824 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:25,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:26,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:19:26,024 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:26,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:26,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1239650847, now seen corresponding path program 5 times [2024-10-31 22:19:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322317409] [2024-10-31 22:19:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322317409] [2024-10-31 22:19:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322317409] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425185865] [2024-10-31 22:19:26,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:19:26,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:26,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:26,237 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:26,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:19:26,373 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-31 22:19:26,373 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:26,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:19:26,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:26,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:26,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425185865] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:26,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:26,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-31 22:19:26,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847238195] [2024-10-31 22:19:26,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:26,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:19:26,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:19:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:19:26,654 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:26,854 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2024-10-31 22:19:26,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:19:26,855 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-31 22:19:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:26,855 INFO L225 Difference]: With dead ends: 96 [2024-10-31 22:19:26,856 INFO L226 Difference]: Without dead ends: 60 [2024-10-31 22:19:26,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-10-31 22:19:26,857 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:26,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:26,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-31 22:19:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2024-10-31 22:19:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-10-31 22:19:26,871 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 34 [2024-10-31 22:19:26,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:26,871 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-10-31 22:19:26,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:26,871 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-10-31 22:19:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 22:19:26,872 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:26,872 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:26,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:27,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:19:27,076 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:27,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash -338157539, now seen corresponding path program 6 times [2024-10-31 22:19:27,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:27,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003872004] [2024-10-31 22:19:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:27,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003872004] [2024-10-31 22:19:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003872004] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38156463] [2024-10-31 22:19:28,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:19:28,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:28,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:28,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 22:19:28,185 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-31 22:19:28,185 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:28,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:19:28,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:28,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:19:28,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-10-31 22:19:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:19:28,451 INFO L349 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2024-10-31 22:19:28,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2024-10-31 22:19:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:19:28,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:29,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-10-31 22:19:29,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-31 22:19:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-31 22:19:29,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38156463] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:29,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:29,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 35 [2024-10-31 22:19:29,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104192293] [2024-10-31 22:19:29,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:29,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-31 22:19:29,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-31 22:19:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2024-10-31 22:19:29,908 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:31,050 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-10-31 22:19:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-31 22:19:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-31 22:19:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:31,052 INFO L225 Difference]: With dead ends: 59 [2024-10-31 22:19:31,052 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:19:31,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=365, Invalid=1987, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 22:19:31,054 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:31,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 93 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:19:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:19:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-10-31 22:19:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-10-31 22:19:31,070 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2024-10-31 22:19:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:31,073 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-10-31 22:19:31,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-10-31 22:19:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 22:19:31,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:31,075 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:31,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 22:19:31,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:19:31,281 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:31,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash 724113925, now seen corresponding path program 7 times [2024-10-31 22:19:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:31,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252574706] [2024-10-31 22:19:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:31,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:31,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252574706] [2024-10-31 22:19:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252574706] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798740162] [2024-10-31 22:19:31,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:19:31,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:31,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:31,612 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:31,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 22:19:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:31,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:19:31,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:31,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:32,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798740162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:32,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:32,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-31 22:19:32,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902565971] [2024-10-31 22:19:32,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:32,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:19:32,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:19:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:19:32,089 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:19:32,304 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-10-31 22:19:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-31 22:19:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-31 22:19:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:19:32,305 INFO L225 Difference]: With dead ends: 104 [2024-10-31 22:19:32,305 INFO L226 Difference]: Without dead ends: 65 [2024-10-31 22:19:32,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-10-31 22:19:32,306 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:19:32,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 26 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:19:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-31 22:19:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2024-10-31 22:19:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-10-31 22:19:32,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2024-10-31 22:19:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:19:32,322 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-10-31 22:19:32,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-10-31 22:19:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-31 22:19:32,323 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:19:32,323 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:32,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:32,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:19:32,528 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:19:32,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -294413625, now seen corresponding path program 8 times [2024-10-31 22:19:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423426564] [2024-10-31 22:19:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:19:33,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:33,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423426564] [2024-10-31 22:19:33,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423426564] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:33,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245663717] [2024-10-31 22:19:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:33,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:33,148 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:33,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ab0006-7e12-469e-8f94-410cbe4ce12d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 22:19:33,278 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:19:33,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:33,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-31 22:19:33,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:33,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:19:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:19:33,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-10-31 22:19:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:19:33,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:19:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:19:33,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:19:33,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32