./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 a9a441ad5f70efa202eb02609b90cbc83f5bf4487618c2a09bffcfe320d65f90 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 18:21:27,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 18:21:27,595 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 18:21:27,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 18:21:27,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 18:21:27,638 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 18:21:27,639 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 18:21:27,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 18:21:27,640 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 18:21:27,642 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 18:21:27,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 18:21:27,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 18:21:27,651 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 18:21:27,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 18:21:27,654 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 18:21:27,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 18:21:27,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 18:21:27,654 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 18:21:27,655 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 18:21:27,655 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 18:21:27,655 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 18:21:27,657 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 18:21:27,658 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 18:21:27,658 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 18:21:27,658 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 18:21:27,658 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 18:21:27,659 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 18:21:27,659 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 18:21:27,659 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 18:21:27,659 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 18:21:27,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 18:21:27,660 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 18:21:27,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:21:27,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 18:21:27,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 18:21:27,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 18:21:27,662 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 18:21:27,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 18:21:27,662 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 18:21:27,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 18:21:27,663 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 18:21:27,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 18:21:27,664 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9a441ad5f70efa202eb02609b90cbc83f5bf4487618c2a09bffcfe320d65f90 [2024-10-12 18:21:27,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 18:21:27,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 18:21:27,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 18:21:27,938 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 18:21:27,938 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 18:21:27,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i [2024-10-12 18:21:29,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 18:21:29,650 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 18:21:29,651 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i [2024-10-12 18:21:29,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2948391/3aaa109cb5bf4779804ba456494ced1f/FLAG367248ada [2024-10-12 18:21:29,678 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e2948391/3aaa109cb5bf4779804ba456494ced1f [2024-10-12 18:21:29,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 18:21:29,683 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 18:21:29,684 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 18:21:29,684 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 18:21:29,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 18:21:29,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:21:29" (1/1) ... [2024-10-12 18:21:29,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e7ba2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:29, skipping insertion in model container [2024-10-12 18:21:29,697 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:21:29" (1/1) ... [2024-10-12 18:21:29,745 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 18:21:30,047 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22387,22400] [2024-10-12 18:21:30,053 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22458,22471] [2024-10-12 18:21:30,054 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22532,22545] [2024-10-12 18:21:30,058 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22624,22637] [2024-10-12 18:21:30,058 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22701,22714] [2024-10-12 18:21:30,059 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22796,22809] [2024-10-12 18:21:30,060 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22873,22886] [2024-10-12 18:21:30,064 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22956,22969] [2024-10-12 18:21:30,065 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23051,23064] [2024-10-12 18:21:30,086 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23128,23141] [2024-10-12 18:21:30,087 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23211,23224] [2024-10-12 18:21:30,088 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23300,23313] [2024-10-12 18:21:30,089 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23386,23399] [2024-10-12 18:21:30,092 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23532,23545] [2024-10-12 18:21:30,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:21:30,110 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 18:21:30,164 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22387,22400] [2024-10-12 18:21:30,165 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22458,22471] [2024-10-12 18:21:30,165 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22532,22545] [2024-10-12 18:21:30,166 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22624,22637] [2024-10-12 18:21:30,167 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22701,22714] [2024-10-12 18:21:30,167 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22796,22809] [2024-10-12 18:21:30,168 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22873,22886] [2024-10-12 18:21:30,169 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[22956,22969] [2024-10-12 18:21:30,169 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23051,23064] [2024-10-12 18:21:30,170 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23128,23141] [2024-10-12 18:21:30,171 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23211,23224] [2024-10-12 18:21:30,172 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23300,23313] [2024-10-12 18:21:30,176 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23386,23399] [2024-10-12 18:21:30,177 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-1.i[23532,23545] [2024-10-12 18:21:30,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 18:21:30,213 INFO L204 MainTranslator]: Completed translation [2024-10-12 18:21:30,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30 WrapperNode [2024-10-12 18:21:30,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 18:21:30,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 18:21:30,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 18:21:30,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 18:21:30,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,259 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 220 [2024-10-12 18:21:30,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 18:21:30,260 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 18:21:30,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 18:21:30,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 18:21:30,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,274 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,295 INFO L175 MemorySlicer]: Split 28 memory accesses to 2 slices as follows [2, 26]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2024-10-12 18:21:30,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,296 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 18:21:30,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 18:21:30,327 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 18:21:30,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 18:21:30,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (1/1) ... [2024-10-12 18:21:30,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 18:21:30,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:21:30,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 18:21:30,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 18:21:30,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-12 18:21:30,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-12 18:21:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-12 18:21:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-12 18:21:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 18:21:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 18:21:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 18:21:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 18:21:30,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 18:21:30,571 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 18:21:30,573 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 18:21:30,906 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-10-12 18:21:30,906 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 18:21:30,943 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 18:21:30,943 INFO L314 CfgBuilder]: Removed 31 assume(true) statements. [2024-10-12 18:21:30,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:21:30 BoogieIcfgContainer [2024-10-12 18:21:30,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 18:21:30,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 18:21:30,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 18:21:30,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 18:21:30,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:21:29" (1/3) ... [2024-10-12 18:21:30,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ad62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:21:30, skipping insertion in model container [2024-10-12 18:21:30,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:21:30" (2/3) ... [2024-10-12 18:21:30,960 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ad62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:21:30, skipping insertion in model container [2024-10-12 18:21:30,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:21:30" (3/3) ... [2024-10-12 18:21:30,962 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-queue-1.i [2024-10-12 18:21:30,980 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 18:21:30,980 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-12 18:21:31,053 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 18:21:31,063 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;@11af5dfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 18:21:31,063 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-12 18:21:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 67 states have (on average 2.044776119402985) internal successors, (137), 81 states have internal predecessors, (137), 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) [2024-10-12 18:21:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-12 18:21:31,075 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:31,075 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-12 18:21:31,075 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:31,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash 11235370, now seen corresponding path program 1 times [2024-10-12 18:21:31,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:31,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780511768] [2024-10-12 18:21:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:31,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:31,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:31,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780511768] [2024-10-12 18:21:31,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780511768] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:31,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:31,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:21:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326762440] [2024-10-12 18:21:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:31,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 18:21:31,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 18:21:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 18:21:31,276 INFO L87 Difference]: Start difference. First operand has 82 states, 67 states have (on average 2.044776119402985) internal successors, (137), 81 states have internal predecessors, (137), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2024-10-12 18:21:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:31,309 INFO L93 Difference]: Finished difference Result 163 states and 273 transitions. [2024-10-12 18:21:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 18:21:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2024-10-12 18:21:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:31,320 INFO L225 Difference]: With dead ends: 163 [2024-10-12 18:21:31,320 INFO L226 Difference]: Without dead ends: 79 [2024-10-12 18:21:31,339 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 [2024-10-12 18:21:31,342 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:31,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-12 18:21:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-10-12 18:21:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.353846153846154) internal successors, (88), 78 states have internal predecessors, (88), 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) [2024-10-12 18:21:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2024-10-12 18:21:31,423 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 4 [2024-10-12 18:21:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:31,423 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2024-10-12 18:21:31,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2024-10-12 18:21:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2024-10-12 18:21:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-12 18:21:31,425 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:31,425 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-12 18:21:31,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 18:21:31,426 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:31,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash 346540763, now seen corresponding path program 1 times [2024-10-12 18:21:31,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:31,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326227213] [2024-10-12 18:21:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:31,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:31,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326227213] [2024-10-12 18:21:31,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326227213] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:31,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:31,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:21:31,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084816361] [2024-10-12 18:21:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:31,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:21:31,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:31,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:21:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:31,543 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-10-12 18:21:31,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:31,595 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2024-10-12 18:21:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:21:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-10-12 18:21:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:31,600 INFO L225 Difference]: With dead ends: 79 [2024-10-12 18:21:31,600 INFO L226 Difference]: Without dead ends: 69 [2024-10-12 18:21:31,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:31,602 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:31,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 64 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-12 18:21:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-12 18:21:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.3) internal successors, (78), 68 states have internal predecessors, (78), 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) [2024-10-12 18:21:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-10-12 18:21:31,616 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 5 [2024-10-12 18:21:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:31,616 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-10-12 18:21:31,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2024-10-12 18:21:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-10-12 18:21:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 18:21:31,617 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:31,618 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:31,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 18:21:31,618 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:31,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1300016296, now seen corresponding path program 1 times [2024-10-12 18:21:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021265104] [2024-10-12 18:21:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:31,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021265104] [2024-10-12 18:21:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021265104] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:31,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:31,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:21:31,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514138903] [2024-10-12 18:21:31,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:31,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:21:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:31,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:21:31,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:31,762 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-10-12 18:21:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:31,809 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2024-10-12 18:21:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:21:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2024-10-12 18:21:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:31,811 INFO L225 Difference]: With dead ends: 69 [2024-10-12 18:21:31,811 INFO L226 Difference]: Without dead ends: 67 [2024-10-12 18:21:31,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:31,813 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:31,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-12 18:21:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-10-12 18:21:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 66 states have internal predecessors, (76), 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) [2024-10-12 18:21:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-10-12 18:21:31,830 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 8 [2024-10-12 18:21:31,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:31,830 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-10-12 18:21:31,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-10-12 18:21:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-10-12 18:21:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-12 18:21:31,831 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:31,832 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:31,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 18:21:31,832 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:31,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:31,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1331859152, now seen corresponding path program 1 times [2024-10-12 18:21:31,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:31,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038769235] [2024-10-12 18:21:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:31,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:31,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:31,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038769235] [2024-10-12 18:21:31,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038769235] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:31,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:31,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 18:21:31,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294119185] [2024-10-12 18:21:31,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:31,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:21:31,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:21:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:31,919 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) 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) [2024-10-12 18:21:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:31,970 INFO L93 Difference]: Finished difference Result 152 states and 177 transitions. [2024-10-12 18:21:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:21:31,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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 [2024-10-12 18:21:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:31,972 INFO L225 Difference]: With dead ends: 152 [2024-10-12 18:21:31,972 INFO L226 Difference]: Without dead ends: 86 [2024-10-12 18:21:31,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:31,974 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:31,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 132 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-12 18:21:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2024-10-12 18:21:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 74 states have internal predecessors, (85), 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) [2024-10-12 18:21:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-10-12 18:21:31,996 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 11 [2024-10-12 18:21:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:31,996 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-10-12 18:21:31,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) 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) [2024-10-12 18:21:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-10-12 18:21:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 18:21:31,997 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:31,997 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:31,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-12 18:21:31,997 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:31,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash -591627506, now seen corresponding path program 1 times [2024-10-12 18:21:31,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:31,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810380622] [2024-10-12 18:21:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:31,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810380622] [2024-10-12 18:21:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810380622] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 18:21:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301293272] [2024-10-12 18:21:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:32,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 18:21:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 18:21:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-12 18:21:32,201 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-12 18:21:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:32,324 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2024-10-12 18:21:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:21:32,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 [2024-10-12 18:21:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:32,326 INFO L225 Difference]: With dead ends: 90 [2024-10-12 18:21:32,326 INFO L226 Difference]: Without dead ends: 70 [2024-10-12 18:21:32,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-12 18:21:32,327 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:32,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 260 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 18:21:32,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-12 18:21:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-12 18:21:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 69 states have internal predecessors, (78), 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) [2024-10-12 18:21:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2024-10-12 18:21:32,335 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 16 [2024-10-12 18:21:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:32,335 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2024-10-12 18:21:32,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-10-12 18:21:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2024-10-12 18:21:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-12 18:21:32,336 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:32,336 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:32,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-12 18:21:32,337 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:32,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:32,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1690121268, now seen corresponding path program 1 times [2024-10-12 18:21:32,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:32,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735001638] [2024-10-12 18:21:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:32,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:32,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:32,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735001638] [2024-10-12 18:21:32,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735001638] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:21:32,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750199132] [2024-10-12 18:21:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:32,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:21:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:21:32,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:21:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 18:21:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:32,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 18:21:32,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:21:32,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-12 18:21:32,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 16 treesize of output 16 [2024-10-12 18:21:33,013 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-12 18:21:33,014 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 1 case distinctions, treesize of input 16 treesize of output 15 [2024-10-12 18:21:33,031 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 5 treesize of output 3 [2024-10-12 18:21:33,044 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-12 18:21:33,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-12 18:21:33,070 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-12 18:21:33,071 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2024-10-12 18:21:33,167 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 24 treesize of output 12 [2024-10-12 18:21:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:33,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:21:33,212 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_148 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_148) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2024-10-12 18:21:33,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:33,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-10-12 18:21:33,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:33,268 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 50 treesize of output 41 [2024-10-12 18:21:33,278 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 20 treesize of output 18 [2024-10-12 18:21:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:33,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750199132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:21:33,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:21:33,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-12 18:21:33,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192909686] [2024-10-12 18:21:33,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:21:33,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-12 18:21:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-12 18:21:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2024-10-12 18:21:33,403 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2024-10-12 18:21:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:33,623 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2024-10-12 18:21:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 18:21:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 18 [2024-10-12 18:21:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:33,626 INFO L225 Difference]: With dead ends: 143 [2024-10-12 18:21:33,626 INFO L226 Difference]: Without dead ends: 141 [2024-10-12 18:21:33,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=63, Unknown=1, NotChecked=16, Total=110 [2024-10-12 18:21:33,627 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:33,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 439 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2024-10-12 18:21:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-12 18:21:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2024-10-12 18:21:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.24) internal successors, (93), 82 states have internal predecessors, (93), 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) [2024-10-12 18:21:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2024-10-12 18:21:33,652 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 18 [2024-10-12 18:21:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:33,652 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2024-10-12 18:21:33,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2024-10-12 18:21:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2024-10-12 18:21:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 18:21:33,655 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:33,656 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:33,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 18:21:33,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-12 18:21:33,857 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:33,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:33,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1171861483, now seen corresponding path program 1 times [2024-10-12 18:21:33,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:33,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960621999] [2024-10-12 18:21:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:33,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:33,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:33,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960621999] [2024-10-12 18:21:33,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960621999] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:33,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:33,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:21:33,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966104968] [2024-10-12 18:21:33,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:33,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:21:33,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:33,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:21:33,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:33,912 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2024-10-12 18:21:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:33,956 INFO L93 Difference]: Finished difference Result 173 states and 198 transitions. [2024-10-12 18:21:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:21:33,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 [2024-10-12 18:21:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:33,959 INFO L225 Difference]: With dead ends: 173 [2024-10-12 18:21:33,959 INFO L226 Difference]: Without dead ends: 107 [2024-10-12 18:21:33,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:33,960 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:33,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 124 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-12 18:21:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2024-10-12 18:21:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 95 states have internal predecessors, (106), 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) [2024-10-12 18:21:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-10-12 18:21:33,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 19 [2024-10-12 18:21:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:33,981 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-10-12 18:21:33,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2024-10-12 18:21:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-10-12 18:21:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 18:21:33,984 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:33,984 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:33,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-12 18:21:33,985 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:33,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash -172877468, now seen corresponding path program 1 times [2024-10-12 18:21:33,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:33,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988410997] [2024-10-12 18:21:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:33,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 18:21:34,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:34,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988410997] [2024-10-12 18:21:34,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988410997] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:34,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:34,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:21:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987705190] [2024-10-12 18:21:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:34,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:21:34,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:21:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:34,057 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2024-10-12 18:21:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:34,102 INFO L93 Difference]: Finished difference Result 200 states and 227 transitions. [2024-10-12 18:21:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:21:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) Word has length 26 [2024-10-12 18:21:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:34,104 INFO L225 Difference]: With dead ends: 200 [2024-10-12 18:21:34,104 INFO L226 Difference]: Without dead ends: 121 [2024-10-12 18:21:34,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:34,105 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:34,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-12 18:21:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2024-10-12 18:21:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.188118811881188) internal successors, (120), 108 states have internal predecessors, (120), 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) [2024-10-12 18:21:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2024-10-12 18:21:34,118 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 26 [2024-10-12 18:21:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:34,118 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2024-10-12 18:21:34,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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) [2024-10-12 18:21:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2024-10-12 18:21:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-12 18:21:34,119 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:34,119 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:34,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-12 18:21:34,120 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:34,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash -746524485, now seen corresponding path program 1 times [2024-10-12 18:21:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:34,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15942298] [2024-10-12 18:21:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:34,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:34,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15942298] [2024-10-12 18:21:34,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15942298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:21:34,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705248770] [2024-10-12 18:21:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:34,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:21:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:21:34,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:21:34,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 18:21:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:34,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 18:21:34,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:21:34,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-12 18:21:34,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 16 treesize of output 16 [2024-10-12 18:21:34,659 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-12 18:21:34,660 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 1 case distinctions, treesize of input 16 treesize of output 15 [2024-10-12 18:21:34,664 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 5 treesize of output 3 [2024-10-12 18:21:34,685 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:21:34,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-12 18:21:34,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-12 18:21:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:21:34,815 INFO L349 Elim1Store]: treesize reduction 44, result has 10.2 percent of original size [2024-10-12 18:21:34,816 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 36 [2024-10-12 18:21:34,831 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-12 18:21:34,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2024-10-12 18:21:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:21:34,846 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 41 treesize of output 30 [2024-10-12 18:21:34,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2024-10-12 18:21:34,898 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 33 treesize of output 24 [2024-10-12 18:21:34,973 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 24 treesize of output 12 [2024-10-12 18:21:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:34,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:21:35,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:35,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2024-10-12 18:21:35,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:35,145 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 95 treesize of output 82 [2024-10-12 18:21:35,151 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 52 treesize of output 50 [2024-10-12 18:21:35,159 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 50 treesize of output 46 [2024-10-12 18:21:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:35,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705248770] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:21:35,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:21:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2024-10-12 18:21:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217763806] [2024-10-12 18:21:35,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:21:35,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 18:21:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:35,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 18:21:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=153, Unknown=6, NotChecked=0, Total=210 [2024-10-12 18:21:35,369 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 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) [2024-10-12 18:21:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:35,823 INFO L93 Difference]: Finished difference Result 157 states and 172 transitions. [2024-10-12 18:21:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:21:35,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-12 18:21:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:35,829 INFO L225 Difference]: With dead ends: 157 [2024-10-12 18:21:35,829 INFO L226 Difference]: Without dead ends: 155 [2024-10-12 18:21:35,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=302, Unknown=6, NotChecked=0, Total=420 [2024-10-12 18:21:35,830 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 318 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:35,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 386 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 18:21:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-10-12 18:21:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2024-10-12 18:21:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 100 states have (on average 1.18) internal successors, (118), 106 states have internal predecessors, (118), 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) [2024-10-12 18:21:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2024-10-12 18:21:35,843 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 27 [2024-10-12 18:21:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:35,844 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2024-10-12 18:21:35,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 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) [2024-10-12 18:21:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2024-10-12 18:21:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 18:21:35,844 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:35,845 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:35,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 18:21:36,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-12 18:21:36,046 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:36,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1798535576, now seen corresponding path program 1 times [2024-10-12 18:21:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:36,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092809721] [2024-10-12 18:21:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 18:21:36,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:36,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092809721] [2024-10-12 18:21:36,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092809721] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 18:21:36,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 18:21:36,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 18:21:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330216960] [2024-10-12 18:21:36,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 18:21:36,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 18:21:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 18:21:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:36,080 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-12 18:21:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:36,099 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2024-10-12 18:21:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 18:21:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 28 [2024-10-12 18:21:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:36,100 INFO L225 Difference]: With dead ends: 110 [2024-10-12 18:21:36,100 INFO L226 Difference]: Without dead ends: 108 [2024-10-12 18:21:36,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 18:21:36,101 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:36,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 138 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 18:21:36,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-12 18:21:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-10-12 18:21:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 107 states have internal predecessors, (119), 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) [2024-10-12 18:21:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2024-10-12 18:21:36,112 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 28 [2024-10-12 18:21:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:36,113 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2024-10-12 18:21:36,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-10-12 18:21:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2024-10-12 18:21:36,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-12 18:21:36,114 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:36,114 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:36,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-12 18:21:36,114 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:36,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1798533654, now seen corresponding path program 1 times [2024-10-12 18:21:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:36,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572091584] [2024-10-12 18:21:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:36,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:36,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:36,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572091584] [2024-10-12 18:21:36,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572091584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:21:36,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597283787] [2024-10-12 18:21:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:36,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:21:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:21:36,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:21:36,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 18:21:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:36,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-12 18:21:36,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:21:36,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-12 18:21:36,764 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-12 18:21:36,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-10-12 18:21:36,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 16 treesize of output 16 [2024-10-12 18:21:36,774 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 16 treesize of output 11 [2024-10-12 18:21:36,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 16 treesize of output 16 [2024-10-12 18:21:36,782 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 16 treesize of output 11 [2024-10-12 18:21:36,817 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-12 18:21:36,817 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2024-10-12 18:21:36,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-12 18:21:36,828 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 24 treesize of output 11 [2024-10-12 18:21:36,987 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 27 treesize of output 15 [2024-10-12 18:21:36,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-10-12 18:21:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:37,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:21:37,127 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 69 treesize of output 49 [2024-10-12 18:21:37,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:37,184 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-10-12 18:21:37,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:37,193 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-10-12 18:21:37,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:37,204 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 64 treesize of output 47 [2024-10-12 18:21:37,210 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 29 treesize of output 27 [2024-10-12 18:21:37,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:37,224 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 48 treesize of output 51 [2024-10-12 18:21:37,232 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 35 treesize of output 33 [2024-10-12 18:21:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597283787] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 18:21:37,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 18:21:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2024-10-12 18:21:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204494289] [2024-10-12 18:21:37,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 18:21:37,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 18:21:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 18:21:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 18:21:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=224, Unknown=4, NotChecked=0, Total=272 [2024-10-12 18:21:37,323 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-10-12 18:21:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 18:21:37,673 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2024-10-12 18:21:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-12 18:21:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 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 28 [2024-10-12 18:21:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 18:21:37,676 INFO L225 Difference]: With dead ends: 187 [2024-10-12 18:21:37,676 INFO L226 Difference]: Without dead ends: 185 [2024-10-12 18:21:37,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=362, Unknown=4, NotChecked=0, Total=462 [2024-10-12 18:21:37,677 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 174 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 18:21:37,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 540 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 18:21:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-12 18:21:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 117. [2024-10-12 18:21:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 116 states have internal predecessors, (129), 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) [2024-10-12 18:21:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2024-10-12 18:21:37,696 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 28 [2024-10-12 18:21:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 18:21:37,696 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2024-10-12 18:21:37,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 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) [2024-10-12 18:21:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2024-10-12 18:21:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 18:21:37,697 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 18:21:37,697 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 18:21:37,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 18:21:37,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:21:37,899 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2024-10-12 18:21:37,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 18:21:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash -366206391, now seen corresponding path program 1 times [2024-10-12 18:21:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 18:21:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929738460] [2024-10-12 18:21:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 18:21:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:38,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 18:21:38,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929738460] [2024-10-12 18:21:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929738460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 18:21:38,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539809577] [2024-10-12 18:21:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 18:21:38,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 18:21:38,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 18:21:38,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 18:21:38,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 18:21:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 18:21:38,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-12 18:21:38,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 18:21:38,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-12 18:21:38,553 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2024-10-12 18:21:38,566 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-12 18:21:38,566 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 1 case distinctions, treesize of input 16 treesize of output 15 [2024-10-12 18:21:38,570 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 5 treesize of output 3 [2024-10-12 18:21:38,593 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-12 18:21:38,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-12 18:21:38,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 16 treesize of output 16 [2024-10-12 18:21:38,608 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 16 treesize of output 11 [2024-10-12 18:21:38,642 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 16 treesize of output 11 [2024-10-12 18:21:38,648 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 16 treesize of output 11 [2024-10-12 18:21:38,763 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-12 18:21:38,764 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 52 [2024-10-12 18:21:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 18:21:38,782 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-10-12 18:21:38,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 57 [2024-10-12 18:21:38,794 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-12 18:21:38,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 14 [2024-10-12 18:21:38,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 11 [2024-10-12 18:21:38,828 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-12 18:21:38,829 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 1 case distinctions, treesize of input 16 treesize of output 15 [2024-10-12 18:21:38,833 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 5 treesize of output 3 [2024-10-12 18:21:38,846 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2024-10-12 18:21:38,846 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 31 [2024-10-12 18:21:38,924 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-10-12 18:21:38,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 68 [2024-10-12 18:21:38,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 11 [2024-10-12 18:21:39,128 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-12 18:21:39,128 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 23 [2024-10-12 18:21:39,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-10-12 18:21:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 18:21:39,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 18:21:39,168 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_568 (Array Int Int)) (v_ArrVal_567 (Array Int Int))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_567))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_568) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0))) is different from false [2024-10-12 18:21:39,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2024-10-12 18:21:39,290 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_568 (Array Int Int)) (v_ArrVal_567 (Array Int Int)) (v_arrayElimArr_13 (Array Int Int)) (v_ArrVal_565 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_13 |c_ULTIMATE.start_main_~item~0#1.offset|))) (or (= .cse0 0) (not (= (select |c_#valid| .cse0) 0)) (not (= (select (let ((.cse1 (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~item~0#1.base| v_arrayElimArr_13) .cse0 v_ArrVal_567))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_565) .cse0 v_ArrVal_568) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0))))) is different from false [2024-10-12 18:21:39,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,304 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 65 [2024-10-12 18:21:39,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,311 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 49 [2024-10-12 18:21:39,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 3444 treesize of output 2309 [2024-10-12 18:21:39,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,529 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 2103 treesize of output 2030 [2024-10-12 18:21:39,649 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 1307 treesize of output 1287 [2024-10-12 18:21:39,703 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 1287 treesize of output 1247 [2024-10-12 18:21:39,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1285 treesize of output 1205 [2024-10-12 18:21:39,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 18:21:39,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 915 treesize of output 891