./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-programs/copysome1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 29c11d006ccc17ffcd2d0ed55176947b470e18e4deadd67e8df28761f278f9af --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:03:21,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:03:21,987 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:03:22,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:03:22,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:03:22,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:03:22,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:03:22,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:03:22,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:03:22,029 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:03:22,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:03:22,030 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:03:22,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:03:22,031 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:03:22,031 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:03:22,032 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:03:22,032 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:03:22,033 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:03:22,033 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:03:22,033 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:03:22,033 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:03:22,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:03:22,034 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:03:22,034 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:03:22,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:03:22,035 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:03:22,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:03:22,035 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:03:22,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:03:22,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:03:22,036 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:03:22,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:03:22,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:03:22,037 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:03:22,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:03:22,038 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:03:22,038 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:03:22,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:03:22,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:03:22,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:03:22,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:03:22,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:03:22,042 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29c11d006ccc17ffcd2d0ed55176947b470e18e4deadd67e8df28761f278f9af [2024-10-10 22:03:22,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:03:22,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:03:22,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:03:22,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:03:22,313 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:03:22,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i [2024-10-10 22:03:23,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:03:23,882 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:03:23,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/copysome1-1.i [2024-10-10 22:03:23,889 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f42b60653/7b03ee1a82a44f10b0a95cdd2b16834d/FLAGeb315044b [2024-10-10 22:03:24,277 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f42b60653/7b03ee1a82a44f10b0a95cdd2b16834d [2024-10-10 22:03:24,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:03:24,282 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:03:24,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:03:24,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:03:24,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:03:24,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4abf605d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24, skipping insertion in model container [2024-10-10 22:03:24,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,311 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:03:24,485 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-programs/copysome1-1.i[806,819] [2024-10-10 22:03:24,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:03:24,513 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:03:24,524 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-programs/copysome1-1.i[806,819] [2024-10-10 22:03:24,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:03:24,550 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:03:24,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24 WrapperNode [2024-10-10 22:03:24,551 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:03:24,552 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:03:24,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:03:24,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:03:24,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,587 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2024-10-10 22:03:24,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:03:24,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:03:24,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:03:24,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:03:24,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,602 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,619 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-10-10 22:03:24,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,643 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:03:24,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:03:24,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:03:24,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:03:24,648 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (1/1) ... [2024-10-10 22:03:24,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:03:24,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:24,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:03:24,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:03:24,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:03:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:03:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:03:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-10 22:03:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 22:03:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:03:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:03:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-10 22:03:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:03:24,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:03:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:03:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:03:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-10 22:03:24,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 22:03:24,792 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:03:24,795 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:03:24,947 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-10 22:03:24,949 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:03:24,989 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:03:24,990 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 22:03:24,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:03:24 BoogieIcfgContainer [2024-10-10 22:03:24,994 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:03:24,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:03:24,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:03:25,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:03:25,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:03:24" (1/3) ... [2024-10-10 22:03:25,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772b21b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:03:25, skipping insertion in model container [2024-10-10 22:03:25,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:24" (2/3) ... [2024-10-10 22:03:25,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772b21b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:03:25, skipping insertion in model container [2024-10-10 22:03:25,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:03:24" (3/3) ... [2024-10-10 22:03:25,005 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2024-10-10 22:03:25,021 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:03:25,022 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:03:25,077 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:03:25,086 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;@1abe107f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:03:25,087 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:03:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-10 22:03:25,096 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:25,097 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:25,098 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:25,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1300637357, now seen corresponding path program 1 times [2024-10-10 22:03:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101284788] [2024-10-10 22:03:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:25,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:25,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:25,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101284788] [2024-10-10 22:03:25,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101284788] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:25,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:25,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:03:25,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436710897] [2024-10-10 22:03:25,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:25,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:03:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:03:25,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:03:25,375 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:25,433 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2024-10-10 22:03:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:03:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-10 22:03:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:25,442 INFO L225 Difference]: With dead ends: 34 [2024-10-10 22:03:25,442 INFO L226 Difference]: Without dead ends: 18 [2024-10-10 22:03:25,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:03:25,448 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:25,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-10 22:03:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-10-10 22:03:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-10-10 22:03:25,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2024-10-10 22:03:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:25,474 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-10-10 22:03:25,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-10-10 22:03:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-10 22:03:25,475 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:25,475 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:25,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:03:25,476 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:25,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1547209917, now seen corresponding path program 1 times [2024-10-10 22:03:25,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:25,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612932863] [2024-10-10 22:03:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:03:25,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:25,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612932863] [2024-10-10 22:03:25,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612932863] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223194216] [2024-10-10 22:03:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:25,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:25,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:25,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:25,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:03:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:25,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 22:03:25,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:03:25,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:03:25,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223194216] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:25,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:25,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-10 22:03:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019161392] [2024-10-10 22:03:25,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:25,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 22:03:25,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 22:03:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:03:25,777 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:25,853 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-10-10 22:03:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 22:03:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-10 22:03:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:25,854 INFO L225 Difference]: With dead ends: 41 [2024-10-10 22:03:25,854 INFO L226 Difference]: Without dead ends: 28 [2024-10-10 22:03:25,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 22:03:25,856 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:25,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-10 22:03:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-10 22:03:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-10-10 22:03:25,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2024-10-10 22:03:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:25,868 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-10-10 22:03:25,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-10-10 22:03:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 22:03:25,870 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:25,871 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:25,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:03:26,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:26,076 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:26,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash -845296322, now seen corresponding path program 2 times [2024-10-10 22:03:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:26,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913918986] [2024-10-10 22:03:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-10 22:03:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:26,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913918986] [2024-10-10 22:03:26,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913918986] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083437396] [2024-10-10 22:03:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:03:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:26,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:26,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:03:26,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:03:26,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:26,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 22:03:26,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-10 22:03:26,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-10 22:03:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083437396] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:26,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-10 22:03:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565428245] [2024-10-10 22:03:26,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:26,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-10 22:03:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-10 22:03:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-10 22:03:26,544 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:26,653 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2024-10-10 22:03:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-10 22:03:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-10 22:03:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:26,655 INFO L225 Difference]: With dead ends: 74 [2024-10-10 22:03:26,655 INFO L226 Difference]: Without dead ends: 52 [2024-10-10 22:03:26,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-10 22:03:26,657 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:26,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-10 22:03:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-10 22:03:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2024-10-10 22:03:26,665 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 25 [2024-10-10 22:03:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:26,665 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2024-10-10 22:03:26,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2024-10-10 22:03:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-10 22:03:26,667 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:26,667 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:26,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:26,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:26,869 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:26,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1362221730, now seen corresponding path program 3 times [2024-10-10 22:03:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825970647] [2024-10-10 22:03:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-10 22:03:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825970647] [2024-10-10 22:03:27,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825970647] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155552934] [2024-10-10 22:03:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:27,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:27,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:27,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:27,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:03:27,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-10 22:03:27,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:27,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-10 22:03:27,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-10 22:03:27,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-10-10 22:03:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155552934] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:28,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-10 22:03:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17885961] [2024-10-10 22:03:28,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:28,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-10 22:03:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-10 22:03:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:03:28,095 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:28,305 INFO L93 Difference]: Finished difference Result 140 states and 201 transitions. [2024-10-10 22:03:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-10 22:03:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-10 22:03:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:28,307 INFO L225 Difference]: With dead ends: 140 [2024-10-10 22:03:28,307 INFO L226 Difference]: Without dead ends: 100 [2024-10-10 22:03:28,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:03:28,309 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:28,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 30 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:03:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-10 22:03:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-10-10 22:03:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 99 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2024-10-10 22:03:28,331 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 49 [2024-10-10 22:03:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:28,332 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2024-10-10 22:03:28,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2024-10-10 22:03:28,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-10 22:03:28,336 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:28,336 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:28,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:28,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:28,541 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:28,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2054479262, now seen corresponding path program 4 times [2024-10-10 22:03:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36984087] [2024-10-10 22:03:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2024-10-10 22:03:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:29,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36984087] [2024-10-10 22:03:29,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36984087] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:29,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907326541] [2024-10-10 22:03:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:03:29,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:29,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:29,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:03:29,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:03:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:29,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-10 22:03:29,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:29,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-10 22:03:29,685 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:29,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:29,749 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:29,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:29,812 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:29,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:29,882 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:29,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:29,944 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:29,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,004 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,061 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,119 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,174 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,230 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,285 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,341 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,402 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,461 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,520 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,585 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,653 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,717 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,789 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,854 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:30,929 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-10-10 22:03:30,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2024-10-10 22:03:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 610 proven. 105 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-10 22:03:31,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:32,169 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-10 22:03:32,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-10 22:03:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 125 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2024-10-10 22:03:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907326541] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:32,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28, 10] total 54 [2024-10-10 22:03:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895848576] [2024-10-10 22:03:32,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:32,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-10 22:03:32,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-10 22:03:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=2177, Unknown=0, NotChecked=0, Total=2862 [2024-10-10 22:03:32,181 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:33,168 INFO L93 Difference]: Finished difference Result 265 states and 346 transitions. [2024-10-10 22:03:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-10 22:03:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2024-10-10 22:03:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:33,170 INFO L225 Difference]: With dead ends: 265 [2024-10-10 22:03:33,170 INFO L226 Difference]: Without dead ends: 189 [2024-10-10 22:03:33,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 21 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1329, Invalid=4523, Unknown=0, NotChecked=0, Total=5852 [2024-10-10 22:03:33,173 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 381 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:33,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 92 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:03:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-10 22:03:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2024-10-10 22:03:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.2914285714285714) internal successors, (226), 175 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2024-10-10 22:03:33,188 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 97 [2024-10-10 22:03:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:33,188 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2024-10-10 22:03:33,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2024-10-10 22:03:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-10 22:03:33,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:33,191 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:33,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:03:33,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:33,396 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:33,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1071930527, now seen corresponding path program 1 times [2024-10-10 22:03:33,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:33,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005987369] [2024-10-10 22:03:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2024-10-10 22:03:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005987369] [2024-10-10 22:03:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005987369] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:33,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:03:33,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673991901] [2024-10-10 22:03:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:33,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:03:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:03:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:03:33,601 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:33,631 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2024-10-10 22:03:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:03:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2024-10-10 22:03:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:33,632 INFO L225 Difference]: With dead ends: 183 [2024-10-10 22:03:33,633 INFO L226 Difference]: Without dead ends: 107 [2024-10-10 22:03:33,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:03:33,634 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:33,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-10 22:03:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2024-10-10 22:03:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 106 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2024-10-10 22:03:33,648 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 101 [2024-10-10 22:03:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:33,649 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2024-10-10 22:03:33,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2024-10-10 22:03:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-10-10 22:03:33,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:33,653 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:33,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-10 22:03:33,653 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:33,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash -474033708, now seen corresponding path program 1 times [2024-10-10 22:03:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:33,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147144979] [2024-10-10 22:03:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2024-10-10 22:03:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147144979] [2024-10-10 22:03:33,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147144979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:33,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:33,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:03:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679601948] [2024-10-10 22:03:33,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:33,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:03:33,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:03:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:03:33,830 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:33,848 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2024-10-10 22:03:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:03:33,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-10-10 22:03:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:33,850 INFO L225 Difference]: With dead ends: 116 [2024-10-10 22:03:33,850 INFO L226 Difference]: Without dead ends: 109 [2024-10-10 22:03:33,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:03:33,851 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 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 [2024-10-10 22:03:33,852 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-10 22:03:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-10-10 22:03:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 106 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2024-10-10 22:03:33,861 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 104 [2024-10-10 22:03:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:33,862 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2024-10-10 22:03:33,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,862 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2024-10-10 22:03:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-10-10 22:03:33,863 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:33,863 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:33,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-10 22:03:33,863 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:33,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -363876066, now seen corresponding path program 1 times [2024-10-10 22:03:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:33,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282096798] [2024-10-10 22:03:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2024-10-10 22:03:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:34,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282096798] [2024-10-10 22:03:34,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282096798] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496394019] [2024-10-10 22:03:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:34,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:34,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:34,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:03:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:34,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:03:34,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2024-10-10 22:03:34,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2024-10-10 22:03:35,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496394019] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:35,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:35,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-10-10 22:03:35,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080171615] [2024-10-10 22:03:35,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:35,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-10 22:03:35,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:35,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-10 22:03:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 22:03:35,670 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:36,077 INFO L93 Difference]: Finished difference Result 289 states and 413 transitions. [2024-10-10 22:03:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-10 22:03:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2024-10-10 22:03:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:36,079 INFO L225 Difference]: With dead ends: 289 [2024-10-10 22:03:36,079 INFO L226 Difference]: Without dead ends: 207 [2024-10-10 22:03:36,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 22:03:36,081 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 486 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:36,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 66 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:03:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-10 22:03:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2024-10-10 22:03:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2024-10-10 22:03:36,104 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 106 [2024-10-10 22:03:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:36,105 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2024-10-10 22:03:36,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2024-10-10 22:03:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-10-10 22:03:36,111 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:36,111 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:36,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:36,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:36,312 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:36,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:36,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1831221155, now seen corresponding path program 2 times [2024-10-10 22:03:36,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:36,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761948553] [2024-10-10 22:03:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:36,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2024-10-10 22:03:38,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:38,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761948553] [2024-10-10 22:03:38,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761948553] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:38,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603027306] [2024-10-10 22:03:38,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:03:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:38,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:38,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:03:39,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:03:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:39,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 1276 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-10 22:03:39,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2024-10-10 22:03:39,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2024-10-10 22:03:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603027306] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:41,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:41,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-10-10 22:03:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911292608] [2024-10-10 22:03:41,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:41,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-10-10 22:03:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-10-10 22:03:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-10 22:03:41,945 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:43,675 INFO L93 Difference]: Finished difference Result 564 states and 813 transitions. [2024-10-10 22:03:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-10-10 22:03:43,676 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2024-10-10 22:03:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:43,677 INFO L225 Difference]: With dead ends: 564 [2024-10-10 22:03:43,678 INFO L226 Difference]: Without dead ends: 407 [2024-10-10 22:03:43,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2024-10-10 22:03:43,681 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1340 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:43,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 39 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:03:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-10-10 22:03:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2024-10-10 22:03:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.248768472906404) internal successors, (507), 406 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 507 transitions. [2024-10-10 22:03:43,699 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 507 transitions. Word has length 206 [2024-10-10 22:03:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:43,699 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 507 transitions. [2024-10-10 22:03:43,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 507 transitions. [2024-10-10 22:03:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2024-10-10 22:03:43,705 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:43,705 INFO L215 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:43,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 22:03:43,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-10 22:03:43,910 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:43,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1994097341, now seen corresponding path program 3 times [2024-10-10 22:03:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:43,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752404878] [2024-10-10 22:03:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 19211 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 14360 trivial. 0 not checked. [2024-10-10 22:03:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:51,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752404878] [2024-10-10 22:03:51,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752404878] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:51,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870389856] [2024-10-10 22:03:51,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:51,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:51,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:51,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:51,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process