./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/array-crafted/xor5.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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:17:43,573 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:17:43,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:17:43,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:17:43,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:17:43,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:17:43,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:17:43,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:17:43,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:17:43,703 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:17:43,704 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:17:43,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:17:43,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:17:43,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:17:43,707 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:17:43,707 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:17:43,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:17:43,708 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:17:43,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:17:43,709 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:17:43,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:17:43,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:17:43,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:17:43,713 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:17:43,714 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:17:43,714 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:17:43,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:17:43,714 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:17:43,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:17:43,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:17:43,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:17:43,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:17:43,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:17:43,716 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:17:43,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:17:43,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:17:43,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:17:43,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:17:43,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:17:43,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:17:43,717 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:17:43,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:17:43,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2024-10-13 22:17:44,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:17:44,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:17:44,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:17:44,055 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:17:44,056 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:17:44,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-10-13 22:17:45,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:17:45,693 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:17:45,694 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2024-10-13 22:17:45,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bca9abba/6629104323ac4854ab3437fc2099f3d5/FLAG47784ff18 [2024-10-13 22:17:46,071 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bca9abba/6629104323ac4854ab3437fc2099f3d5 [2024-10-13 22:17:46,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:17:46,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:17:46,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:17:46,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:17:46,082 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:17:46,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d32e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46, skipping insertion in model container [2024-10-13 22:17:46,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,102 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:17:46,265 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/array-crafted/xor5.i[1364,1377] [2024-10-13 22:17:46,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:17:46,277 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:17:46,304 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/array-crafted/xor5.i[1364,1377] [2024-10-13 22:17:46,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:17:46,329 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:17:46,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46 WrapperNode [2024-10-13 22:17:46,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:17:46,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:17:46,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:17:46,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:17:46,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,376 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2024-10-13 22:17:46,376 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:17:46,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:17:46,377 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:17:46,377 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:17:46,389 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,413 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 7, 11]. 55 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 5 writes are split as follows [0, 0, 5]. [2024-10-13 22:17:46,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,421 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,433 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,438 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,440 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:17:46,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:17:46,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:17:46,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:17:46,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (1/1) ... [2024-10-13 22:17:46,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:17:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:46,482 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) [2024-10-13 22:17:46,486 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 [2024-10-13 22:17:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:17:46,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:17:46,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:17:46,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:17:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:17:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:17:46,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:17:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-10-13 22:17:46,534 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-10-13 22:17:46,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:17:46,632 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:17:46,636 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:17:46,824 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-10-13 22:17:46,824 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:17:46,873 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:17:46,873 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 22:17:46,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:17:46 BoogieIcfgContainer [2024-10-13 22:17:46,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:17:46,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:17:46,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:17:46,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:17:46,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:17:46" (1/3) ... [2024-10-13 22:17:46,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f4ac91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:17:46, skipping insertion in model container [2024-10-13 22:17:46,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:17:46" (2/3) ... [2024-10-13 22:17:46,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65f4ac91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:17:46, skipping insertion in model container [2024-10-13 22:17:46,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:17:46" (3/3) ... [2024-10-13 22:17:46,883 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2024-10-13 22:17:46,902 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:17:46,902 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:17:46,959 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:17:46,970 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;@5a6e7c93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:17:46,970 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:17:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:17:46,991 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:46,992 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:46,993 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:46,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1111550662, now seen corresponding path program 1 times [2024-10-13 22:17:47,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:47,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948899892] [2024-10-13 22:17:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,195 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:17:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,215 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:17:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-13 22:17:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:17:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948899892] [2024-10-13 22:17:47,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948899892] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:17:47,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:17:47,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:17:47,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903010059] [2024-10-13 22:17:47,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:17:47,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:17:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:17:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:17:47,276 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:17:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:47,305 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2024-10-13 22:17:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:17:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-13 22:17:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:47,318 INFO L225 Difference]: With dead ends: 51 [2024-10-13 22:17:47,318 INFO L226 Difference]: Without dead ends: 24 [2024-10-13 22:17:47,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:17:47,327 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:47,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:17:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-13 22:17:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-13 22:17:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-10-13 22:17:47,361 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 26 [2024-10-13 22:17:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:47,361 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-10-13 22:17:47,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:17:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-10-13 22:17:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:17:47,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:47,363 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:47,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:17:47,364 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:47,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1819042790, now seen corresponding path program 1 times [2024-10-13 22:17:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:47,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707135551] [2024-10-13 22:17:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-13 22:17:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,555 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-13 22:17:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-13 22:17:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:17:47,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707135551] [2024-10-13 22:17:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707135551] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:17:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:17:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:17:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474501078] [2024-10-13 22:17:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:17:47,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:17:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:17:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:17:47,581 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:17:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:47,615 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-10-13 22:17:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:17:47,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-10-13 22:17:47,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:47,617 INFO L225 Difference]: With dead ends: 46 [2024-10-13 22:17:47,617 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 22:17:47,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:17:47,619 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:47,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:17:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 22:17:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-13 22:17:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-10-13 22:17:47,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 26 [2024-10-13 22:17:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:47,631 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-10-13 22:17:47,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-13 22:17:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-10-13 22:17:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-13 22:17:47,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:47,633 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:47,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:17:47,634 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:47,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 293893811, now seen corresponding path program 1 times [2024-10-13 22:17:47,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:47,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570448791] [2024-10-13 22:17:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-13 22:17:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-13 22:17:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-13 22:17:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 22:17:47,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:47,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570448791] [2024-10-13 22:17:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570448791] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426237041] [2024-10-13 22:17:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:47,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:47,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:47,840 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) [2024-10-13 22:17:47,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:17:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:47,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 22:17:47,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:17:48,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 22:17:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426237041] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:17:48,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:17:48,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-10-13 22:17:48,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523420590] [2024-10-13 22:17:48,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:48,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 22:17:48,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 22:17:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-13 22:17:48,120 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:17:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:48,212 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2024-10-13 22:17:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 22:17:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 27 [2024-10-13 22:17:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:48,216 INFO L225 Difference]: With dead ends: 53 [2024-10-13 22:17:48,216 INFO L226 Difference]: Without dead ends: 32 [2024-10-13 22:17:48,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-13 22:17:48,217 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:48,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 81 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:17:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-13 22:17:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-10-13 22:17:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-13 22:17:48,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 27 [2024-10-13 22:17:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:48,230 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-13 22:17:48,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-13 22:17:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-13 22:17:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-13 22:17:48,232 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:48,233 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:48,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 22:17:48,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:48,434 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:48,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1738126435, now seen corresponding path program 1 times [2024-10-13 22:17:48,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:48,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298440929] [2024-10-13 22:17:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:48,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:48,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-13 22:17:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:48,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 22:17:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:48,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-13 22:17:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 22:17:48,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:48,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298440929] [2024-10-13 22:17:48,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298440929] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:48,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777637042] [2024-10-13 22:17:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:48,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:48,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:48,626 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) [2024-10-13 22:17:48,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:17:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:48,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 22:17:48,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 22:17:48,782 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 22:17:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777637042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:17:48,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 22:17:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-10-13 22:17:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243713331] [2024-10-13 22:17:48,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:17:48,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:17:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:48,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:17:48,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:17:48,784 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:17:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:48,828 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-10-13 22:17:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:17:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-10-13 22:17:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:48,830 INFO L225 Difference]: With dead ends: 44 [2024-10-13 22:17:48,831 INFO L226 Difference]: Without dead ends: 28 [2024-10-13 22:17:48,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 22:17:48,832 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:48,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:17:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-13 22:17:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-13 22:17:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 22:17:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-10-13 22:17:48,839 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 37 [2024-10-13 22:17:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:48,840 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-10-13 22:17:48,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-13 22:17:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-10-13 22:17:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-13 22:17:48,841 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:48,841 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:48,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 22:17:49,042 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,SelfDestructingSolverStorable3 [2024-10-13 22:17:49,042 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:49,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1906014821, now seen corresponding path program 1 times [2024-10-13 22:17:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145724753] [2024-10-13 22:17:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:50,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-13 22:17:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:51,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 22:17:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:51,485 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:17:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-13 22:17:51,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:51,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145724753] [2024-10-13 22:17:51,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145724753] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:51,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592348613] [2024-10-13 22:17:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:51,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:51,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:51,786 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) [2024-10-13 22:17:51,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:17:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:51,924 WARN L253 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-10-13 22:17:51,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:52,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:17:52,455 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 64 treesize of output 33 [2024-10-13 22:17:53,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:17:53,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-10-13 22:17:53,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:17:53,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 43 [2024-10-13 22:17:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 22:17:54,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:56,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592348613] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:56,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:17:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 52 [2024-10-13 22:17:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957856928] [2024-10-13 22:17:56,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:56,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-13 22:17:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-13 22:17:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=4368, Unknown=0, NotChecked=0, Total=4692 [2024-10-13 22:17:56,642 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-13 22:17:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:17:59,244 INFO L93 Difference]: Finished difference Result 148 states and 209 transitions. [2024-10-13 22:17:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-13 22:17:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2024-10-13 22:17:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:17:59,249 INFO L225 Difference]: With dead ends: 148 [2024-10-13 22:17:59,252 INFO L226 Difference]: Without dead ends: 144 [2024-10-13 22:17:59,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2836 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=700, Invalid=8230, Unknown=0, NotChecked=0, Total=8930 [2024-10-13 22:17:59,257 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:17:59,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 244 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-13 22:17:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-10-13 22:17:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 79. [2024-10-13 22:17:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 68 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-13 22:17:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2024-10-13 22:17:59,286 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 38 [2024-10-13 22:17:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:17:59,286 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2024-10-13 22:17:59,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 43 states have (on average 1.302325581395349) internal successors, (56), 44 states have internal predecessors, (56), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-13 22:17:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2024-10-13 22:17:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:17:59,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:17:59,291 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:17:59,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 22:17:59,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:59,495 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:17:59,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:17:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1003666764, now seen corresponding path program 2 times [2024-10-13 22:17:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:17:59,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581051628] [2024-10-13 22:17:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:17:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:17:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:59,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-13 22:17:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:59,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 22:17:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:59,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-13 22:17:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:17:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-13 22:17:59,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:17:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581051628] [2024-10-13 22:17:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581051628] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:17:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841086955] [2024-10-13 22:17:59,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:17:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:17:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:17:59,622 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) [2024-10-13 22:17:59,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:17:59,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:17:59,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:17:59,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 22:17:59,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:17:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-13 22:17:59,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:17:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-13 22:17:59,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841086955] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:17:59,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:17:59,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2024-10-13 22:17:59,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560419946] [2024-10-13 22:17:59,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:17:59,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 22:17:59,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:17:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 22:17:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-13 22:17:59,856 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:18:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:00,035 INFO L93 Difference]: Finished difference Result 197 states and 289 transitions. [2024-10-13 22:18:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 22:18:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2024-10-13 22:18:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:00,038 INFO L225 Difference]: With dead ends: 197 [2024-10-13 22:18:00,038 INFO L226 Difference]: Without dead ends: 176 [2024-10-13 22:18:00,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-13 22:18:00,040 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 113 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:00,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 343 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:18:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-13 22:18:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 85. [2024-10-13 22:18:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 71 states have (on average 1.3943661971830985) internal successors, (99), 74 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-10-13 22:18:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 119 transitions. [2024-10-13 22:18:00,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 119 transitions. Word has length 39 [2024-10-13 22:18:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:00,058 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 119 transitions. [2024-10-13 22:18:00,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-13 22:18:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 119 transitions. [2024-10-13 22:18:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:18:00,060 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:00,060 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:00,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 22:18:00,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:00,261 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:00,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1009517099, now seen corresponding path program 1 times [2024-10-13 22:18:00,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:00,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333622834] [2024-10-13 22:18:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:00,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:00,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-13 22:18:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:00,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 22:18:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:00,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-13 22:18:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 22:18:00,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333622834] [2024-10-13 22:18:00,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333622834] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044667007] [2024-10-13 22:18:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:00,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:00,790 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:18:00,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:18:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:00,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-13 22:18:00,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:00,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:18:00,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 22:18:01,082 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 19 treesize of output 18 [2024-10-13 22:18:01,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:18:01,143 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-13 22:18:01,143 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2024-10-13 22:18:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:18:01,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:01,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044667007] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:01,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:18:01,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2024-10-13 22:18:01,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97101164] [2024-10-13 22:18:01,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:01,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 22:18:01,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 22:18:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-10-13 22:18:01,485 INFO L87 Difference]: Start difference. First operand 85 states and 119 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-13 22:18:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:02,046 INFO L93 Difference]: Finished difference Result 314 states and 443 transitions. [2024-10-13 22:18:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 22:18:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2024-10-13 22:18:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:02,049 INFO L225 Difference]: With dead ends: 314 [2024-10-13 22:18:02,049 INFO L226 Difference]: Without dead ends: 277 [2024-10-13 22:18:02,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 22:18:02,051 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:02,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 289 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:18:02,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-10-13 22:18:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 203. [2024-10-13 22:18:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 176 states have (on average 1.4204545454545454) internal successors, (250), 182 states have internal predecessors, (250), 13 states have call successors, (13), 9 states have call predecessors, (13), 13 states have return successors, (23), 11 states have call predecessors, (23), 13 states have call successors, (23) [2024-10-13 22:18:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 286 transitions. [2024-10-13 22:18:02,092 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 286 transitions. Word has length 39 [2024-10-13 22:18:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:02,093 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 286 transitions. [2024-10-13 22:18:02,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-13 22:18:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 286 transitions. [2024-10-13 22:18:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:18:02,096 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:02,096 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:02,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 22:18:02,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:02,299 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:02,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:02,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1849221081, now seen corresponding path program 2 times [2024-10-13 22:18:02,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:02,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043589037] [2024-10-13 22:18:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:03,828 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-13 22:18:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:04,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-10-13 22:18:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:04,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-13 22:18:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:18:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:04,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043589037] [2024-10-13 22:18:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043589037] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971320868] [2024-10-13 22:18:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:18:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:04,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:18:04,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:18:04,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:18:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:04,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-13 22:18:04,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:04,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:18:05,303 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 64 treesize of output 33 [2024-10-13 22:18:05,747 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 80 treesize of output 48 [2024-10-13 22:18:05,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:18:06,283 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 114 treesize of output 70 [2024-10-13 22:18:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 22:18:06,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:06,805 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 45 treesize of output 41 [2024-10-13 22:18:06,808 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 56 treesize of output 48 [2024-10-13 22:18:06,830 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 43 treesize of output 39 [2024-10-13 22:18:06,834 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 44 [2024-10-13 22:18:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 22:18:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971320868] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:18:07,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:18:07,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 71 [2024-10-13 22:18:07,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670885243] [2024-10-13 22:18:07,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:07,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-13 22:18:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-13 22:18:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=4634, Unknown=0, NotChecked=0, Total=4970 [2024-10-13 22:18:07,982 INFO L87 Difference]: Start difference. First operand 203 states and 286 transitions. Second operand has 71 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 63 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-13 22:18:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:18:10,638 INFO L93 Difference]: Finished difference Result 464 states and 683 transitions. [2024-10-13 22:18:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-13 22:18:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 63 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 39 [2024-10-13 22:18:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:18:10,641 INFO L225 Difference]: With dead ends: 464 [2024-10-13 22:18:10,642 INFO L226 Difference]: Without dead ends: 460 [2024-10-13 22:18:10,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=693, Invalid=9407, Unknown=0, NotChecked=0, Total=10100 [2024-10-13 22:18:10,645 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:18:10,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 318 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-13 22:18:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-10-13 22:18:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 225. [2024-10-13 22:18:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 194 states have (on average 1.4329896907216495) internal successors, (278), 203 states have internal predecessors, (278), 15 states have call successors, (15), 9 states have call predecessors, (15), 15 states have return successors, (28), 12 states have call predecessors, (28), 15 states have call successors, (28) [2024-10-13 22:18:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 321 transitions. [2024-10-13 22:18:10,721 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 321 transitions. Word has length 39 [2024-10-13 22:18:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:18:10,721 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 321 transitions. [2024-10-13 22:18:10,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 63 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-13 22:18:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 321 transitions. [2024-10-13 22:18:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:18:10,723 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:18:10,723 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:18:10,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:18:10,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:10,928 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:18:10,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:18:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1778168871, now seen corresponding path program 3 times [2024-10-13 22:18:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:18:10,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310944788] [2024-10-13 22:18:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:18:10,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:18:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:11,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-13 22:18:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:11,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-13 22:18:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:11,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-10-13 22:18:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:18:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 22:18:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:18:11,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310944788] [2024-10-13 22:18:11,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310944788] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:11,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748617185] [2024-10-13 22:18:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:18:11,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:18:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:18:11,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:18:11,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:18:11,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 22:18:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:18:11,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-13 22:18:11,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:18:11,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 22:18:11,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:18:11,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2024-10-13 22:18:11,709 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 19 [2024-10-13 22:18:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 22:18:11,763 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-10-13 22:18:11,763 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2024-10-13 22:18:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:18:11,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:18:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748617185] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:18:24,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 22:18:24,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2024-10-13 22:18:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670032402] [2024-10-13 22:18:24,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 22:18:24,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 22:18:24,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:18:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 22:18:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=592, Unknown=3, NotChecked=0, Total=702 [2024-10-13 22:18:24,040 INFO L87 Difference]: Start difference. First operand 225 states and 321 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 18 states have internal predecessors, (53), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-13 22:18:28,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:32,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:36,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:40,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:44,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:48,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:52,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:18:56,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:19:00,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:19:04,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:19:08,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:19:12,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 22:19:16,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]