./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/condn.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:51:14,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:51:14,787 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:51:14,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:51:14,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:51:14,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:51:14,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:51:14,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:51:14,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:51:14,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:51:14,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:51:14,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:51:14,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:51:14,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:51:14,821 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:51:14,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:51:14,821 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:51:14,821 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:51:14,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:51:14,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:51:14,822 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:51:14,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:51:14,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:51:14,825 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:51:14,825 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:51:14,826 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:51:14,826 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:51:14,826 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:51:14,826 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:51:14,826 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:51:14,827 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:51:14,827 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:51:14,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:51:14,827 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:51:14,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:51:14,827 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:51:14,828 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:51:14,828 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:51:14,828 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:51:14,828 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:51:14,829 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:51:14,829 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:51:14,829 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2024-11-16 02:51:15,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:51:15,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:51:15,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:51:15,076 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:51:15,077 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:51:15,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condn.c [2024-11-16 02:51:16,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:51:16,425 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:51:16,425 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condn.c [2024-11-16 02:51:16,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee304b7b9/e3d5ce14bd4f416b95b0fb4e7c8d0240/FLAG54a8d366f [2024-11-16 02:51:16,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee304b7b9/e3d5ce14bd4f416b95b0fb4e7c8d0240 [2024-11-16 02:51:16,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:51:16,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:51:16,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:51:16,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:51:16,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:51:16,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:51:16" (1/1) ... [2024-11-16 02:51:16,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e45580c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:16, skipping insertion in model container [2024-11-16 02:51:16,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:51:16" (1/1) ... [2024-11-16 02:51:16,881 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:51:17,009 WARN L250 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-fpi/condn.c[588,601] [2024-11-16 02:51:17,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:51:17,030 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:51:17,068 WARN L250 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-fpi/condn.c[588,601] [2024-11-16 02:51:17,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:51:17,099 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:51:17,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17 WrapperNode [2024-11-16 02:51:17,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:51:17,104 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:51:17,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:51:17,108 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:51:17,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,155 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-11-16 02:51:17,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:51:17,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:51:17,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:51:17,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:51:17,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,189 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,211 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 8, 6]. 50 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 3 writes are split as follows [0, 0, 3]. [2024-11-16 02:51:17,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,223 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,231 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:51:17,234 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:51:17,234 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:51:17,234 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:51:17,241 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (1/1) ... [2024-11-16 02:51:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:51:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:17,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:51:17,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:51:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:51:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:51:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:51:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:51:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:51:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:51:17,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:51:17,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:51:17,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:51:17,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:51:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:51:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:51:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:51:17,423 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:51:17,424 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:51:17,561 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 02:51:17,561 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:51:17,574 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:51:17,577 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:51:17,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:51:17 BoogieIcfgContainer [2024-11-16 02:51:17,578 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:51:17,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:51:17,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:51:17,584 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:51:17,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:51:16" (1/3) ... [2024-11-16 02:51:17,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce52e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:51:17, skipping insertion in model container [2024-11-16 02:51:17,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:51:17" (2/3) ... [2024-11-16 02:51:17,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce52e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:51:17, skipping insertion in model container [2024-11-16 02:51:17,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:51:17" (3/3) ... [2024-11-16 02:51:17,587 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2024-11-16 02:51:17,601 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:51:17,601 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:51:17,655 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:51:17,662 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;@6cad5b38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:51:17,662 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:51:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2024-11-16 02:51:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-16 02:51:17,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:17,676 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:17,676 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:17,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1859437904, now seen corresponding path program 1 times [2024-11-16 02:51:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:17,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880288120] [2024-11-16 02:51:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:17,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880288120] [2024-11-16 02:51:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880288120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:51:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:51:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:51:17,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234637834] [2024-11-16 02:51:17,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:51:17,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:51:17,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:51:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:51:17,855 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-11-16 02:51:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:17,865 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2024-11-16 02:51:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:51:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2024-11-16 02:51:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:17,872 INFO L225 Difference]: With dead ends: 45 [2024-11-16 02:51:17,872 INFO L226 Difference]: Without dead ends: 20 [2024-11-16 02:51:17,874 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:51:17,876 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:17,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:51:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-16 02:51:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-16 02:51:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2024-11-16 02:51:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-16 02:51:17,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2024-11-16 02:51:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:17,900 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-16 02:51:17,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2024-11-16 02:51:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-16 02:51:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 02:51:17,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:17,901 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:17,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:51:17,902 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:17,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1711721076, now seen corresponding path program 1 times [2024-11-16 02:51:17,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:17,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132274994] [2024-11-16 02:51:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:17,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132274994] [2024-11-16 02:51:18,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132274994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:51:18,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:51:18,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 02:51:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32248894] [2024-11-16 02:51:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:51:18,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 02:51:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 02:51:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-16 02:51:18,104 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:18,144 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-11-16 02:51:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 02:51:18,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-16 02:51:18,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:18,145 INFO L225 Difference]: With dead ends: 46 [2024-11-16 02:51:18,145 INFO L226 Difference]: Without dead ends: 33 [2024-11-16 02:51:18,145 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 [2024-11-16 02:51:18,146 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:18,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 21 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:51:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-16 02:51:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2024-11-16 02:51:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-16 02:51:18,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-11-16 02:51:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:18,151 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-16 02:51:18,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-16 02:51:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-16 02:51:18,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:18,152 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:18,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:51:18,153 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:18,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1490145611, now seen corresponding path program 1 times [2024-11-16 02:51:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984493487] [2024-11-16 02:51:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:51:18,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984493487] [2024-11-16 02:51:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984493487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336210740] [2024-11-16 02:51:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:18,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:18,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:18,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:51:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:18,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 02:51:18,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:18,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:51:18,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:51:18,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:51:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:18,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:51:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336210740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:18,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2024-11-16 02:51:18,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568922287] [2024-11-16 02:51:18,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:18,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:51:18,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:51:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:51:18,802 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:18,935 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2024-11-16 02:51:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 02:51:18,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-16 02:51:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:18,937 INFO L225 Difference]: With dead ends: 51 [2024-11-16 02:51:18,937 INFO L226 Difference]: Without dead ends: 48 [2024-11-16 02:51:18,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:51:18,938 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:18,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 74 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-16 02:51:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 27. [2024-11-16 02:51:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-16 02:51:18,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2024-11-16 02:51:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:18,943 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-16 02:51:18,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-16 02:51:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-16 02:51:18,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:18,944 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:18,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 02:51:19,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:19,145 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:19,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:19,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1009504338, now seen corresponding path program 1 times [2024-11-16 02:51:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:19,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048999168] [2024-11-16 02:51:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:51:19,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048999168] [2024-11-16 02:51:19,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048999168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:19,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978503743] [2024-11-16 02:51:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:19,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:19,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:19,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:51:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:19,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 02:51:19,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:51:19,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 02:51:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978503743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:19,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:19,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-16 02:51:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115828436] [2024-11-16 02:51:19,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:19,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 02:51:19,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 02:51:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-16 02:51:19,385 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2024-11-16 02:51:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:19,457 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2024-11-16 02:51:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 02:51:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 26 [2024-11-16 02:51:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:19,458 INFO L225 Difference]: With dead ends: 72 [2024-11-16 02:51:19,458 INFO L226 Difference]: Without dead ends: 43 [2024-11-16 02:51:19,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-16 02:51:19,459 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:19,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 62 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-16 02:51:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-11-16 02:51:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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) [2024-11-16 02:51:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-16 02:51:19,463 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2024-11-16 02:51:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:19,463 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-16 02:51:19,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2024-11-16 02:51:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-16 02:51:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 02:51:19,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:19,464 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:19,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:51:19,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:51:19,665 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:19,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1866664017, now seen corresponding path program 2 times [2024-11-16 02:51:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:19,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95860714] [2024-11-16 02:51:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:19,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:20,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:20,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95860714] [2024-11-16 02:51:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95860714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983611239] [2024-11-16 02:51:20,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:51:20,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:20,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:20,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:51:20,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:51:20,173 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:20,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 02:51:20,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:20,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:51:20,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:20,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:51:20,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:51:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:20,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:51:20,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983611239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:20,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:20,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2024-11-16 02:51:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935105108] [2024-11-16 02:51:20,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:20,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 02:51:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:20,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 02:51:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:51:20,439 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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) [2024-11-16 02:51:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:20,639 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-11-16 02:51:20,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 02:51:20,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 32 [2024-11-16 02:51:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:20,641 INFO L225 Difference]: With dead ends: 66 [2024-11-16 02:51:20,641 INFO L226 Difference]: Without dead ends: 63 [2024-11-16 02:51:20,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-16 02:51:20,642 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:20,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 145 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-16 02:51:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2024-11-16 02:51:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-16 02:51:20,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 32 [2024-11-16 02:51:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:20,647 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-16 02:51:20,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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) [2024-11-16 02:51:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-16 02:51:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 02:51:20,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:20,648 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:20,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:51:20,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:20,853 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:20,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1182919592, now seen corresponding path program 3 times [2024-11-16 02:51:20,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:20,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282759193] [2024-11-16 02:51:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:20,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:51:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282759193] [2024-11-16 02:51:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282759193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443719648] [2024-11-16 02:51:20,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:51:20,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:20,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:20,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:51:20,994 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 02:51:20,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:20,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 02:51:20,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:51:21,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 02:51:21,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443719648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:21,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:21,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-16 02:51:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452702793] [2024-11-16 02:51:21,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:21,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:51:21,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:51:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:51:21,142 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2024-11-16 02:51:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:21,236 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2024-11-16 02:51:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 02:51:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-16 02:51:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:21,239 INFO L225 Difference]: With dead ends: 94 [2024-11-16 02:51:21,239 INFO L226 Difference]: Without dead ends: 53 [2024-11-16 02:51:21,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-16 02:51:21,242 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:21,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 78 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-16 02:51:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2024-11-16 02:51:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2024-11-16 02:51:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-11-16 02:51:21,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2024-11-16 02:51:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:21,252 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-11-16 02:51:21,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2024-11-16 02:51:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-11-16 02:51:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-16 02:51:21,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:21,253 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:21,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 02:51:21,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:21,453 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:21,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -369190761, now seen corresponding path program 4 times [2024-11-16 02:51:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522927214] [2024-11-16 02:51:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:21,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:21,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522927214] [2024-11-16 02:51:21,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522927214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:21,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49317429] [2024-11-16 02:51:21,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:51:21,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:21,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:21,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:21,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:51:21,926 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:51:21,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:21,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 02:51:21,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:21,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-16 02:51:22,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-16 02:51:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:51:22,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:22,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-16 02:51:22,173 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:51:22,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2024-11-16 02:51:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 02:51:22,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49317429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:22,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:22,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2024-11-16 02:51:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404417230] [2024-11-16 02:51:22,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:22,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 02:51:22,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 02:51:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-11-16 02:51:22,185 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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) [2024-11-16 02:51:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:22,511 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2024-11-16 02:51:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-16 02:51:22,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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 42 [2024-11-16 02:51:22,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:22,512 INFO L225 Difference]: With dead ends: 81 [2024-11-16 02:51:22,512 INFO L226 Difference]: Without dead ends: 78 [2024-11-16 02:51:22,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 02:51:22,513 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:22,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 228 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:51:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-16 02:51:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2024-11-16 02:51:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 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) [2024-11-16 02:51:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-16 02:51:22,521 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 42 [2024-11-16 02:51:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:22,521 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-16 02:51:22,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 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) [2024-11-16 02:51:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-16 02:51:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-16 02:51:22,522 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:22,522 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:22,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 02:51:22,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:22,728 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:22,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1338773918, now seen corresponding path program 5 times [2024-11-16 02:51:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873275709] [2024-11-16 02:51:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:22,863 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:51:22,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873275709] [2024-11-16 02:51:22,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873275709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182112697] [2024-11-16 02:51:22,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:51:22,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:22,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:22,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:51:22,932 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-16 02:51:22,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:22,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:51:22,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:51:23,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 02:51:23,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182112697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:23,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:23,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-16 02:51:23,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454097406] [2024-11-16 02:51:23,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:23,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 02:51:23,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 02:51:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-16 02:51:23,184 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 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) [2024-11-16 02:51:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:23,330 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2024-11-16 02:51:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 02:51:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 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 46 [2024-11-16 02:51:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:23,331 INFO L225 Difference]: With dead ends: 116 [2024-11-16 02:51:23,333 INFO L226 Difference]: Without dead ends: 63 [2024-11-16 02:51:23,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:51:23,334 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:23,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 105 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-16 02:51:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2024-11-16 02:51:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-11-16 02:51:23,342 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2024-11-16 02:51:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:23,342 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-11-16 02:51:23,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 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) [2024-11-16 02:51:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-11-16 02:51:23,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-16 02:51:23,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:23,346 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:23,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 02:51:23,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:23,547 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:23,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 876909085, now seen corresponding path program 6 times [2024-11-16 02:51:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:23,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058451488] [2024-11-16 02:51:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:23,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058451488] [2024-11-16 02:51:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058451488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39493460] [2024-11-16 02:51:24,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:51:24,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:24,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:24,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:51:24,161 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-16 02:51:24,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:24,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 02:51:24,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:24,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:51:24,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2024-11-16 02:51:24,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2024-11-16 02:51:24,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2024-11-16 02:51:24,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-16 02:51:25,010 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-16 02:51:25,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:51:25,013 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 19 treesize of output 12 [2024-11-16 02:51:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:25,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:26,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2024-11-16 02:51:26,075 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:51:26,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 195 [2024-11-16 02:51:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:26,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39493460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:26,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:26,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 21] total 47 [2024-11-16 02:51:26,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274899831] [2024-11-16 02:51:26,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:26,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-16 02:51:26,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-16 02:51:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2024-11-16 02:51:26,253 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 47 states, 47 states have (on average 2.872340425531915) internal successors, (135), 47 states have internal predecessors, (135), 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) [2024-11-16 02:51:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:27,425 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2024-11-16 02:51:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-16 02:51:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.872340425531915) internal successors, (135), 47 states have internal predecessors, (135), 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 52 [2024-11-16 02:51:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:27,427 INFO L225 Difference]: With dead ends: 135 [2024-11-16 02:51:27,427 INFO L226 Difference]: Without dead ends: 113 [2024-11-16 02:51:27,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1287, Invalid=6023, Unknown=0, NotChecked=0, Total=7310 [2024-11-16 02:51:27,429 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 355 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:27,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 404 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:51:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-16 02:51:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2024-11-16 02:51:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 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) [2024-11-16 02:51:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-11-16 02:51:27,435 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 52 [2024-11-16 02:51:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:27,436 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-11-16 02:51:27,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.872340425531915) internal successors, (135), 47 states have internal predecessors, (135), 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) [2024-11-16 02:51:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-11-16 02:51:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-16 02:51:27,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:27,437 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:27,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 02:51:27,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:27,641 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:27,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1381553341, now seen corresponding path program 1 times [2024-11-16 02:51:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016185468] [2024-11-16 02:51:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:51:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016185468] [2024-11-16 02:51:27,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016185468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:27,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503086184] [2024-11-16 02:51:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:27,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:27,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:27,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:27,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:51:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:27,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 02:51:27,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:51:27,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-16 02:51:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503086184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:28,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:28,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-16 02:51:28,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256870986] [2024-11-16 02:51:28,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:28,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 02:51:28,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 02:51:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:51:28,057 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2024-11-16 02:51:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:28,187 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2024-11-16 02:51:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 02:51:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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 56 [2024-11-16 02:51:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:28,188 INFO L225 Difference]: With dead ends: 144 [2024-11-16 02:51:28,188 INFO L226 Difference]: Without dead ends: 76 [2024-11-16 02:51:28,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-16 02:51:28,190 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 125 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:28,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 137 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-16 02:51:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2024-11-16 02:51:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 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) [2024-11-16 02:51:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-16 02:51:28,201 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 56 [2024-11-16 02:51:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:28,202 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-16 02:51:28,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2024-11-16 02:51:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-16 02:51:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-16 02:51:28,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:28,203 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:28,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 02:51:28,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 02:51:28,404 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:28,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1154415389, now seen corresponding path program 7 times [2024-11-16 02:51:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:28,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318707822] [2024-11-16 02:51:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:28,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318707822] [2024-11-16 02:51:28,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318707822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:28,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259002622] [2024-11-16 02:51:28,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:51:28,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:28,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:28,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:28,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:51:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:28,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-16 02:51:28,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:29,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:51:29,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:29,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:29,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:29,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:29,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:51:29,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:51:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:29,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 02:51:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259002622] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:29,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2024-11-16 02:51:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208799507] [2024-11-16 02:51:29,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:29,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-16 02:51:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-16 02:51:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2024-11-16 02:51:29,769 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 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) [2024-11-16 02:51:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:30,414 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2024-11-16 02:51:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 02:51:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 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 62 [2024-11-16 02:51:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:30,415 INFO L225 Difference]: With dead ends: 111 [2024-11-16 02:51:30,416 INFO L226 Difference]: Without dead ends: 108 [2024-11-16 02:51:30,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2024-11-16 02:51:30,417 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 152 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:30,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 551 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 02:51:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-16 02:51:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2024-11-16 02:51:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 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) [2024-11-16 02:51:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-16 02:51:30,422 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 62 [2024-11-16 02:51:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:30,423 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-16 02:51:30,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 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) [2024-11-16 02:51:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-16 02:51:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-16 02:51:30,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:30,424 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:30,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 02:51:30,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:30,628 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:30,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash 773289962, now seen corresponding path program 8 times [2024-11-16 02:51:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:30,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888360499] [2024-11-16 02:51:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:30,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 37 proven. 48 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:51:30,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:30,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888360499] [2024-11-16 02:51:30,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888360499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:30,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803540431] [2024-11-16 02:51:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:51:30,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:30,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:30,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:51:30,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:51:30,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:30,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 02:51:30,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:51:31,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:51:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803540431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:31,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:31,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-16 02:51:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461325761] [2024-11-16 02:51:31,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:31,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 02:51:31,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 02:51:31,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:51:31,318 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:31,476 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2024-11-16 02:51:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 02:51:31,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-16 02:51:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:31,476 INFO L225 Difference]: With dead ends: 160 [2024-11-16 02:51:31,477 INFO L226 Difference]: Without dead ends: 83 [2024-11-16 02:51:31,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2024-11-16 02:51:31,477 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:31,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 172 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:51:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-16 02:51:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2024-11-16 02:51:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.125) internal successors, (81), 72 states have internal predecessors, (81), 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) [2024-11-16 02:51:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2024-11-16 02:51:31,483 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 66 [2024-11-16 02:51:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:31,483 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2024-11-16 02:51:31,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:51:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2024-11-16 02:51:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-16 02:51:31,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:31,487 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:31,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 02:51:31,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:51:31,688 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:31,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1924923625, now seen corresponding path program 9 times [2024-11-16 02:51:31,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:31,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109705445] [2024-11-16 02:51:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:31,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:32,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109705445] [2024-11-16 02:51:32,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109705445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:32,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954742684] [2024-11-16 02:51:32,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:51:32,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:32,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:32,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:32,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 02:51:32,583 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-16 02:51:32,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:32,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-16 02:51:32,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:32,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-11-16 02:51:33,132 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-16 02:51:33,132 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 12 [2024-11-16 02:51:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:51:33,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:33,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-16 02:51:33,878 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-16 02:51:33,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 29 [2024-11-16 02:51:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 40 proven. 79 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-16 02:51:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954742684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:34,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:34,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 52 [2024-11-16 02:51:34,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297624641] [2024-11-16 02:51:34,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:34,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-16 02:51:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-16 02:51:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2331, Unknown=0, NotChecked=0, Total=2652 [2024-11-16 02:51:34,075 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 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) [2024-11-16 02:51:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:38,674 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2024-11-16 02:51:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-11-16 02:51:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 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 72 [2024-11-16 02:51:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:38,675 INFO L225 Difference]: With dead ends: 299 [2024-11-16 02:51:38,675 INFO L226 Difference]: Without dead ends: 137 [2024-11-16 02:51:38,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 119 SyntacticMatches, 8 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8868 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3163, Invalid=26593, Unknown=0, NotChecked=0, Total=29756 [2024-11-16 02:51:38,681 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 689 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:38,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 994 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 02:51:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-16 02:51:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 91. [2024-11-16 02:51:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 90 states have internal predecessors, (102), 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) [2024-11-16 02:51:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2024-11-16 02:51:38,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 72 [2024-11-16 02:51:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:38,689 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2024-11-16 02:51:38,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 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) [2024-11-16 02:51:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2024-11-16 02:51:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-16 02:51:38,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:38,690 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:38,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 02:51:38,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 02:51:38,920 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:38,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -471090873, now seen corresponding path program 2 times [2024-11-16 02:51:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:38,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373962690] [2024-11-16 02:51:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:38,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373962690] [2024-11-16 02:51:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373962690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601279419] [2024-11-16 02:51:39,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:51:39,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:39,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:39,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 02:51:40,028 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:51:40,028 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:40,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-16 02:51:40,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:40,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:51:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:51:40,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-16 02:51:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 02:51:40,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 02:51:40,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 26 [2024-11-16 02:51:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 02:51:40,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:41,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2024-11-16 02:51:41,539 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:51:41,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2024-11-16 02:51:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 3 proven. 150 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-16 02:51:41,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601279419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:41,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:41,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 19] total 57 [2024-11-16 02:51:41,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369571072] [2024-11-16 02:51:41,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:41,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-16 02:51:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-16 02:51:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2878, Unknown=1, NotChecked=0, Total=3192 [2024-11-16 02:51:41,565 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 57 states, 57 states have (on average 3.5964912280701755) internal successors, (205), 57 states have internal predecessors, (205), 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) [2024-11-16 02:51:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:43,439 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2024-11-16 02:51:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-16 02:51:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.5964912280701755) internal successors, (205), 57 states have internal predecessors, (205), 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 78 [2024-11-16 02:51:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:43,441 INFO L225 Difference]: With dead ends: 171 [2024-11-16 02:51:43,441 INFO L226 Difference]: Without dead ends: 168 [2024-11-16 02:51:43,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1217, Invalid=9084, Unknown=1, NotChecked=0, Total=10302 [2024-11-16 02:51:43,444 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 470 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:43,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1214 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-16 02:51:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-16 02:51:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 83. [2024-11-16 02:51:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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) [2024-11-16 02:51:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2024-11-16 02:51:43,463 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 78 [2024-11-16 02:51:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:43,463 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2024-11-16 02:51:43,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.5964912280701755) internal successors, (205), 57 states have internal predecessors, (205), 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) [2024-11-16 02:51:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2024-11-16 02:51:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-16 02:51:43,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:43,464 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:43,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 02:51:43,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 02:51:43,665 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:43,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash 448370223, now seen corresponding path program 10 times [2024-11-16 02:51:43,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:43,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069729827] [2024-11-16 02:51:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:44,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:44,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069729827] [2024-11-16 02:51:44,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069729827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47964128] [2024-11-16 02:51:44,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:51:44,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:44,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:44,513 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:44,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 02:51:44,612 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:51:44,612 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:44,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-16 02:51:44,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:44,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-16 02:51:44,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-16 02:51:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-16 02:51:44,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:45,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-16 02:51:45,168 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:51:45,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2024-11-16 02:51:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-16 02:51:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47964128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:45,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 42 [2024-11-16 02:51:45,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459885154] [2024-11-16 02:51:45,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:45,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-16 02:51:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-16 02:51:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2024-11-16 02:51:45,198 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 42 states have internal predecessors, (164), 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) [2024-11-16 02:51:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:46,109 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2024-11-16 02:51:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-16 02:51:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 42 states have internal predecessors, (164), 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 82 [2024-11-16 02:51:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:46,110 INFO L225 Difference]: With dead ends: 141 [2024-11-16 02:51:46,111 INFO L226 Difference]: Without dead ends: 138 [2024-11-16 02:51:46,111 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2024-11-16 02:51:46,112 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 97 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:46,112 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 805 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 02:51:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-16 02:51:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 87. [2024-11-16 02:51:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 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) [2024-11-16 02:51:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-16 02:51:46,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2024-11-16 02:51:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:46,121 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-16 02:51:46,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 42 states have internal predecessors, (164), 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) [2024-11-16 02:51:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-16 02:51:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-16 02:51:46,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:46,121 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:46,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-16 02:51:46,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 02:51:46,326 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:46,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1994489034, now seen corresponding path program 11 times [2024-11-16 02:51:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:46,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152724115] [2024-11-16 02:51:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 79 proven. 82 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-16 02:51:46,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152724115] [2024-11-16 02:51:46,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152724115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:46,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437744197] [2024-11-16 02:51:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:51:46,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:46,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:46,526 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 02:51:46,703 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-16 02:51:46,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:46,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 02:51:46,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 105 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-16 02:51:46,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 105 proven. 98 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-16 02:51:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437744197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:47,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:47,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-16 02:51:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183519446] [2024-11-16 02:51:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:47,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-16 02:51:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-16 02:51:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2024-11-16 02:51:47,045 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 29 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) [2024-11-16 02:51:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:47,256 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2024-11-16 02:51:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 02:51:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 29 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) Word has length 86 [2024-11-16 02:51:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:47,257 INFO L225 Difference]: With dead ends: 204 [2024-11-16 02:51:47,257 INFO L226 Difference]: Without dead ends: 103 [2024-11-16 02:51:47,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 02:51:47,258 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 237 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:47,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 216 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:51:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-16 02:51:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2024-11-16 02:51:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 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) [2024-11-16 02:51:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-11-16 02:51:47,267 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 86 [2024-11-16 02:51:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:47,267 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-11-16 02:51:47,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.551724137931035) internal successors, (132), 29 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) [2024-11-16 02:51:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-11-16 02:51:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-16 02:51:47,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:47,268 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:47,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-16 02:51:47,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:47,468 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:47,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1138349237, now seen corresponding path program 12 times [2024-11-16 02:51:47,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:47,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430009400] [2024-11-16 02:51:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:47,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:48,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430009400] [2024-11-16 02:51:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430009400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361930998] [2024-11-16 02:51:48,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:51:48,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:48,473 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:48,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-16 02:51:48,685 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-16 02:51:48,685 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:48,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-16 02:51:48,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:49,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-16 02:51:49,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 30 proven. 177 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-16 02:51:49,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:50,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2024-11-16 02:51:50,061 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:51:50,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2024-11-16 02:51:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-11-16 02:51:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361930998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:50,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 65 [2024-11-16 02:51:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800726359] [2024-11-16 02:51:50,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:50,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-16 02:51:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-16 02:51:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3825, Unknown=0, NotChecked=0, Total=4160 [2024-11-16 02:51:50,165 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 65 states, 65 states have (on average 3.0307692307692307) internal successors, (197), 65 states have internal predecessors, (197), 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) [2024-11-16 02:51:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:54,858 INFO L93 Difference]: Finished difference Result 406 states and 449 transitions. [2024-11-16 02:51:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2024-11-16 02:51:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0307692307692307) internal successors, (197), 65 states have internal predecessors, (197), 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 92 [2024-11-16 02:51:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:54,859 INFO L225 Difference]: With dead ends: 406 [2024-11-16 02:51:54,859 INFO L226 Difference]: Without dead ends: 403 [2024-11-16 02:51:54,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12772 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2574, Invalid=37226, Unknown=0, NotChecked=0, Total=39800 [2024-11-16 02:51:54,863 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 1025 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:54,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 1460 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-16 02:51:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-16 02:51:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 97. [2024-11-16 02:51:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 96 states have internal predecessors, (107), 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) [2024-11-16 02:51:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2024-11-16 02:51:54,874 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 92 [2024-11-16 02:51:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:54,875 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2024-11-16 02:51:54,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0307692307692307) internal successors, (197), 65 states have internal predecessors, (197), 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) [2024-11-16 02:51:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2024-11-16 02:51:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-16 02:51:54,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:54,876 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:54,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-16 02:51:55,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-16 02:51:55,076 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:55,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1823469892, now seen corresponding path program 13 times [2024-11-16 02:51:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573450158] [2024-11-16 02:51:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 106 proven. 102 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-16 02:51:55,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573450158] [2024-11-16 02:51:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573450158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379150260] [2024-11-16 02:51:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:51:55,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:55,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:55,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:55,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-16 02:51:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:55,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 02:51:55,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-16 02:51:55,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-11-16 02:51:56,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379150260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:56,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:56,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-11-16 02:51:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272590279] [2024-11-16 02:51:56,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:56,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-16 02:51:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-16 02:51:56,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:51:56,076 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 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) [2024-11-16 02:51:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:51:56,333 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2024-11-16 02:51:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-16 02:51:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 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 96 [2024-11-16 02:51:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:51:56,334 INFO L225 Difference]: With dead ends: 226 [2024-11-16 02:51:56,334 INFO L226 Difference]: Without dead ends: 113 [2024-11-16 02:51:56,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 164 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2024-11-16 02:51:56,334 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 309 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:51:56,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 271 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:51:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-16 02:51:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2024-11-16 02:51:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 102 states have internal predecessors, (114), 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) [2024-11-16 02:51:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2024-11-16 02:51:56,345 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 96 [2024-11-16 02:51:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:51:56,345 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2024-11-16 02:51:56,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 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) [2024-11-16 02:51:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2024-11-16 02:51:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-16 02:51:56,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:51:56,346 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:51:56,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-16 02:51:56,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-16 02:51:56,551 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:51:56,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:51:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash 346606715, now seen corresponding path program 14 times [2024-11-16 02:51:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:51:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673847989] [2024-11-16 02:51:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:51:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:51:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:51:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:57,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:51:57,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673847989] [2024-11-16 02:51:57,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673847989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:51:57,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377117913] [2024-11-16 02:51:57,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:51:57,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:51:57,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:51:57,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:51:57,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-16 02:51:57,591 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:51:57,592 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:51:57,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-16 02:51:57,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:51:57,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:51:57,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:51:57,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:51:58,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:51:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:51:58,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:51:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-16 02:51:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377117913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:51:59,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:51:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24, 23] total 77 [2024-11-16 02:51:59,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066318911] [2024-11-16 02:51:59,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:51:59,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-16 02:51:59,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:51:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-16 02:51:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=5478, Unknown=0, NotChecked=0, Total=5852 [2024-11-16 02:51:59,662 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 77 states, 77 states have (on average 3.5844155844155843) internal successors, (276), 77 states have internal predecessors, (276), 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) [2024-11-16 02:52:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:02,108 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2024-11-16 02:52:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-16 02:52:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.5844155844155843) internal successors, (276), 77 states have internal predecessors, (276), 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 102 [2024-11-16 02:52:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:02,109 INFO L225 Difference]: With dead ends: 171 [2024-11-16 02:52:02,109 INFO L226 Difference]: Without dead ends: 168 [2024-11-16 02:52:02,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 154 SyntacticMatches, 8 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1195, Invalid=13085, Unknown=0, NotChecked=0, Total=14280 [2024-11-16 02:52:02,111 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 475 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:02,111 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1513 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-16 02:52:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-16 02:52:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 107. [2024-11-16 02:52:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:52:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2024-11-16 02:52:02,123 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 102 [2024-11-16 02:52:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:02,123 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2024-11-16 02:52:02,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.5844155844155843) internal successors, (276), 77 states have internal predecessors, (276), 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) [2024-11-16 02:52:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2024-11-16 02:52:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-16 02:52:02,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:02,124 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:02,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:02,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:02,329 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:02,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash -256789630, now seen corresponding path program 15 times [2024-11-16 02:52:02,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:02,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41339770] [2024-11-16 02:52:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 137 proven. 124 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-16 02:52:02,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:02,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41339770] [2024-11-16 02:52:02,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41339770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:02,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668538213] [2024-11-16 02:52:02,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:52:02,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:02,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:02,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:02,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-16 02:52:02,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-16 02:52:02,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:02,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-16 02:52:02,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 171 proven. 162 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-16 02:52:03,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 171 proven. 162 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-16 02:52:03,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668538213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:03,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:03,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-11-16 02:52:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590775336] [2024-11-16 02:52:03,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:03,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-16 02:52:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-16 02:52:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 02:52:03,289 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 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) [2024-11-16 02:52:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:03,584 INFO L93 Difference]: Finished difference Result 248 states and 275 transitions. [2024-11-16 02:52:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 02:52:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 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 [2024-11-16 02:52:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:03,585 INFO L225 Difference]: With dead ends: 248 [2024-11-16 02:52:03,586 INFO L226 Difference]: Without dead ends: 123 [2024-11-16 02:52:03,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=471, Invalid=1421, Unknown=0, NotChecked=0, Total=1892 [2024-11-16 02:52:03,586 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 369 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:03,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 308 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:52:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-16 02:52:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2024-11-16 02:52:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 112 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) [2024-11-16 02:52:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2024-11-16 02:52:03,600 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 106 [2024-11-16 02:52:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:03,600 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2024-11-16 02:52:03,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.571428571428571) internal successors, (160), 35 states have internal predecessors, (160), 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) [2024-11-16 02:52:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2024-11-16 02:52:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-16 02:52:03,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:03,601 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:03,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-16 02:52:03,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:03,802 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:03,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash -829518463, now seen corresponding path program 16 times [2024-11-16 02:52:03,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:03,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060374353] [2024-11-16 02:52:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060374353] [2024-11-16 02:52:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060374353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040245201] [2024-11-16 02:52:05,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:52:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:05,293 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:05,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-16 02:52:05,408 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:52:05,408 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:05,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-16 02:52:05,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:05,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-16 02:52:05,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-16 02:52:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-16 02:52:05,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:06,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-16 02:52:06,197 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:52:06,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2024-11-16 02:52:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-16 02:52:06,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040245201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:06,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:06,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 25] total 61 [2024-11-16 02:52:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503830357] [2024-11-16 02:52:06,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:06,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-16 02:52:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-16 02:52:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3378, Unknown=0, NotChecked=0, Total=3660 [2024-11-16 02:52:06,225 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 61 states have internal predecessors, (239), 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) [2024-11-16 02:52:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:08,691 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2024-11-16 02:52:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-16 02:52:08,692 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 61 states have internal predecessors, (239), 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 112 [2024-11-16 02:52:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:08,693 INFO L225 Difference]: With dead ends: 186 [2024-11-16 02:52:08,693 INFO L226 Difference]: Without dead ends: 183 [2024-11-16 02:52:08,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=993, Invalid=10137, Unknown=0, NotChecked=0, Total=11130 [2024-11-16 02:52:08,694 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 493 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 3263 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 3365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:08,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1632 Invalid, 3365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3263 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-16 02:52:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-16 02:52:08,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 117. [2024-11-16 02:52:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:52:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2024-11-16 02:52:08,714 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 112 [2024-11-16 02:52:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:08,714 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2024-11-16 02:52:08,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 61 states have internal predecessors, (239), 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) [2024-11-16 02:52:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2024-11-16 02:52:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-16 02:52:08,715 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:08,715 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:08,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-16 02:52:08,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:08,919 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:08,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash -802979448, now seen corresponding path program 17 times [2024-11-16 02:52:08,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:08,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879443292] [2024-11-16 02:52:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:08,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 172 proven. 148 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-16 02:52:09,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879443292] [2024-11-16 02:52:09,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879443292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:09,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255453409] [2024-11-16 02:52:09,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:52:09,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:09,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:09,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:09,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-16 02:52:09,512 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-16 02:52:09,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:09,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 02:52:09,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 210 proven. 200 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-16 02:52:09,808 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 210 proven. 200 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-16 02:52:09,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255453409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:09,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:09,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2024-11-16 02:52:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414554313] [2024-11-16 02:52:10,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:10,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-16 02:52:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-16 02:52:10,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2024-11-16 02:52:10,008 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 38 states, 38 states have (on average 4.578947368421052) internal successors, (174), 38 states have internal predecessors, (174), 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) [2024-11-16 02:52:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:10,287 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2024-11-16 02:52:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 02:52:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.578947368421052) internal successors, (174), 38 states have internal predecessors, (174), 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 116 [2024-11-16 02:52:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:10,288 INFO L225 Difference]: With dead ends: 270 [2024-11-16 02:52:10,288 INFO L226 Difference]: Without dead ends: 133 [2024-11-16 02:52:10,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 198 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2024-11-16 02:52:10,292 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 408 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:10,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 276 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:52:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-16 02:52:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2024-11-16 02:52:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 122 states have internal predecessors, (136), 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) [2024-11-16 02:52:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2024-11-16 02:52:10,313 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 116 [2024-11-16 02:52:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:10,313 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2024-11-16 02:52:10,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.578947368421052) internal successors, (174), 38 states have internal predecessors, (174), 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) [2024-11-16 02:52:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2024-11-16 02:52:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-16 02:52:10,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:10,314 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:10,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-16 02:52:10,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-16 02:52:10,515 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:10,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash 315566023, now seen corresponding path program 18 times [2024-11-16 02:52:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:10,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932037599] [2024-11-16 02:52:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:10,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:12,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:12,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932037599] [2024-11-16 02:52:12,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932037599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:12,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102957893] [2024-11-16 02:52:12,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 02:52:12,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:12,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:12,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-16 02:52:12,417 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-16 02:52:12,417 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:12,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-16 02:52:12,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:12,705 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 23 treesize of output 1 [2024-11-16 02:52:12,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 02:52:12,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-11-16 02:52:13,741 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-16 02:52:13,741 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 12 [2024-11-16 02:52:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 242 proven. 142 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-16 02:52:13,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:16,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-16 02:52:16,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-16 02:52:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 171 proven. 213 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-11-16 02:52:16,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102957893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:16,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:16,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 32, 32] total 89 [2024-11-16 02:52:16,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855072424] [2024-11-16 02:52:16,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:16,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-16 02:52:16,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-16 02:52:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=6957, Unknown=0, NotChecked=0, Total=7832 [2024-11-16 02:52:16,703 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 89 states, 89 states have (on average 2.8876404494382024) internal successors, (257), 89 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) [2024-11-16 02:52:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:24,906 INFO L93 Difference]: Finished difference Result 357 states and 404 transitions. [2024-11-16 02:52:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2024-11-16 02:52:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.8876404494382024) internal successors, (257), 89 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) Word has length 122 [2024-11-16 02:52:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:24,908 INFO L225 Difference]: With dead ends: 357 [2024-11-16 02:52:24,908 INFO L226 Difference]: Without dead ends: 161 [2024-11-16 02:52:24,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 181 SyntacticMatches, 25 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14743 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=6038, Invalid=45718, Unknown=0, NotChecked=0, Total=51756 [2024-11-16 02:52:24,911 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1761 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 3090 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 3765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 3090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:24,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1761 Valid, 1662 Invalid, 3765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 3090 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-16 02:52:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-16 02:52:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 129. [2024-11-16 02:52:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1171875) internal successors, (143), 128 states have internal predecessors, (143), 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) [2024-11-16 02:52:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2024-11-16 02:52:24,928 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 122 [2024-11-16 02:52:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:24,928 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2024-11-16 02:52:24,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.8876404494382024) internal successors, (257), 89 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) [2024-11-16 02:52:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2024-11-16 02:52:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-16 02:52:24,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:24,929 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:24,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-16 02:52:25,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-16 02:52:25,132 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:25,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash -390897210, now seen corresponding path program 19 times [2024-11-16 02:52:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328197910] [2024-11-16 02:52:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:26,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328197910] [2024-11-16 02:52:26,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328197910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070919095] [2024-11-16 02:52:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 02:52:26,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:26,810 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:26,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-16 02:52:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:26,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-16 02:52:26,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:27,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:52:27,456 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-16 02:52:27,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 22 [2024-11-16 02:52:28,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:52:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:52:28,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:28,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-16 02:52:28,648 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:52:28,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2024-11-16 02:52:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-16 02:52:28,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070919095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:28,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:28,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 28, 27] total 82 [2024-11-16 02:52:28,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543342505] [2024-11-16 02:52:28,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:28,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-16 02:52:28,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:28,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-16 02:52:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=6201, Unknown=0, NotChecked=0, Total=6642 [2024-11-16 02:52:28,684 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 82 states, 82 states have (on average 4.158536585365853) internal successors, (341), 82 states have internal predecessors, (341), 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) [2024-11-16 02:52:31,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:31,846 INFO L93 Difference]: Finished difference Result 210 states and 227 transitions. [2024-11-16 02:52:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-16 02:52:31,846 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.158536585365853) internal successors, (341), 82 states have internal predecessors, (341), 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 128 [2024-11-16 02:52:31,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:31,847 INFO L225 Difference]: With dead ends: 210 [2024-11-16 02:52:31,847 INFO L226 Difference]: Without dead ends: 207 [2024-11-16 02:52:31,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4604 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1510, Invalid=17396, Unknown=0, NotChecked=0, Total=18906 [2024-11-16 02:52:31,849 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 585 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 4341 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 4457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:31,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2230 Invalid, 4457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4341 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-16 02:52:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-16 02:52:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 133. [2024-11-16 02:52:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1136363636363635) internal successors, (147), 132 states have internal predecessors, (147), 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) [2024-11-16 02:52:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2024-11-16 02:52:31,866 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 128 [2024-11-16 02:52:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:31,866 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2024-11-16 02:52:31,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.158536585365853) internal successors, (341), 82 states have internal predecessors, (341), 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) [2024-11-16 02:52:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2024-11-16 02:52:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-16 02:52:31,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:31,867 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:31,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:32,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:32,068 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:32,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -410342579, now seen corresponding path program 20 times [2024-11-16 02:52:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:32,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387007538] [2024-11-16 02:52:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:33,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:33,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387007538] [2024-11-16 02:52:33,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387007538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:33,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944354553] [2024-11-16 02:52:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:52:33,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:33,911 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:33,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-16 02:52:34,074 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:52:34,074 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:34,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-16 02:52:34,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:34,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:52:34,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:52:34,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-16 02:52:35,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 02:52:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:35,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 541 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-11-16 02:52:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944354553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:37,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:37,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 30, 29] total 98 [2024-11-16 02:52:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001346076] [2024-11-16 02:52:37,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:37,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-16 02:52:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-16 02:52:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=8993, Unknown=0, NotChecked=0, Total=9506 [2024-11-16 02:52:37,306 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 98 states, 98 states have (on average 3.673469387755102) internal successors, (360), 98 states have internal predecessors, (360), 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) [2024-11-16 02:52:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:40,964 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2024-11-16 02:52:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-16 02:52:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.673469387755102) internal successors, (360), 98 states have internal predecessors, (360), 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 132 [2024-11-16 02:52:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:40,966 INFO L225 Difference]: With dead ends: 216 [2024-11-16 02:52:40,966 INFO L226 Difference]: Without dead ends: 213 [2024-11-16 02:52:40,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 205 SyntacticMatches, 16 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6256 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1654, Invalid=21602, Unknown=0, NotChecked=0, Total=23256 [2024-11-16 02:52:40,967 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 585 mSDsluCounter, 2731 mSDsCounter, 0 mSdLazyCounter, 5389 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 5503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 5389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:40,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2790 Invalid, 5503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 5389 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-16 02:52:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-16 02:52:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2024-11-16 02:52:40,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1102941176470589) internal successors, (151), 136 states have internal predecessors, (151), 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) [2024-11-16 02:52:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2024-11-16 02:52:40,986 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 132 [2024-11-16 02:52:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:40,986 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2024-11-16 02:52:40,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.673469387755102) internal successors, (360), 98 states have internal predecessors, (360), 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) [2024-11-16 02:52:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2024-11-16 02:52:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-16 02:52:40,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:40,991 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:41,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-16 02:52:41,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:41,191 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:41,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1358702252, now seen corresponding path program 21 times [2024-11-16 02:52:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5649618] [2024-11-16 02:52:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 254 proven. 202 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 02:52:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5649618] [2024-11-16 02:52:41,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5649618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077950144] [2024-11-16 02:52:41,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:52:41,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:41,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:41,584 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-16 02:52:41,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-16 02:52:41,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:41,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-16 02:52:41,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 02:52:42,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-16 02:52:42,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077950144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:42,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:42,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2024-11-16 02:52:42,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755412100] [2024-11-16 02:52:42,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:42,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-16 02:52:42,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-16 02:52:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2024-11-16 02:52:42,478 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 44 states, 44 states have (on average 3.409090909090909) internal successors, (150), 44 states have internal predecessors, (150), 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) [2024-11-16 02:52:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:52:42,801 INFO L93 Difference]: Finished difference Result 314 states and 347 transitions. [2024-11-16 02:52:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-16 02:52:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.409090909090909) internal successors, (150), 44 states have internal predecessors, (150), 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 136 [2024-11-16 02:52:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:52:42,802 INFO L225 Difference]: With dead ends: 314 [2024-11-16 02:52:42,802 INFO L226 Difference]: Without dead ends: 153 [2024-11-16 02:52:42,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 232 SyntacticMatches, 25 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=747, Invalid=2333, Unknown=0, NotChecked=0, Total=3080 [2024-11-16 02:52:42,803 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 482 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:52:42,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 388 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:52:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-16 02:52:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 143. [2024-11-16 02:52:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 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) [2024-11-16 02:52:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2024-11-16 02:52:42,824 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 136 [2024-11-16 02:52:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:52:42,824 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2024-11-16 02:52:42,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.409090909090909) internal successors, (150), 44 states have internal predecessors, (150), 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) [2024-11-16 02:52:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2024-11-16 02:52:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-16 02:52:42,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:52:42,825 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:52:42,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-16 02:52:43,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-16 02:52:43,029 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:52:43,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:52:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2092771347, now seen corresponding path program 22 times [2024-11-16 02:52:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:52:43,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164926994] [2024-11-16 02:52:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:52:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:52:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:52:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:52:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:52:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164926994] [2024-11-16 02:52:44,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164926994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:52:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397594595] [2024-11-16 02:52:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:52:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:52:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:52:44,854 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:52:44,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-16 02:52:45,011 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:52:45,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:52:45,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-16 02:52:45,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:52:45,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-16 02:52:45,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2024-11-16 02:52:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 638 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-16 02:52:45,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:52:46,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2024-11-16 02:52:46,495 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-16 02:52:46,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 14 [2024-11-16 02:52:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 638 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-16 02:52:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397594595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:52:46,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:52:46,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 31, 31] total 91 [2024-11-16 02:52:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463016659] [2024-11-16 02:52:46,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:52:46,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-16 02:52:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:52:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-16 02:52:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=7690, Unknown=0, NotChecked=0, Total=8190 [2024-11-16 02:52:46,537 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 91 states, 91 states have (on average 3.3956043956043955) internal successors, (309), 91 states have internal predecessors, (309), 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)