./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/tcpy.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 a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 20:48:17,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 20:48:17,733 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 20:48:17,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 20:48:17,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 20:48:17,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 20:48:17,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 20:48:17,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 20:48:17,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 20:48:17,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 20:48:17,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 20:48:17,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 20:48:17,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 20:48:17,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 20:48:17,767 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 20:48:17,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 20:48:17,768 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 20:48:17,768 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 20:48:17,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 20:48:17,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 20:48:17,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 20:48:17,770 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 20:48:17,771 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 20:48:17,771 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 20:48:17,771 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 20:48:17,771 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 20:48:17,771 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 20:48:17,772 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 20:48:17,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 20:48:17,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 20:48:17,772 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 20:48:17,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 20:48:17,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:48:17,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 20:48:17,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 20:48:17,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 20:48:17,773 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 20:48:17,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 20:48:17,774 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 20:48:17,774 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 20:48:17,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 20:48:17,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 20:48:17,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 [2024-11-21 20:48:18,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 20:48:18,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 20:48:18,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 20:48:18,035 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 20:48:18,036 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 20:48:18,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2024-11-21 20:48:19,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 20:48:19,526 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 20:48:19,526 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2024-11-21 20:48:19,534 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b251025c/c37acdc4f6874a73a54610fc1361db0f/FLAGd8baa1950 [2024-11-21 20:48:19,920 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b251025c/c37acdc4f6874a73a54610fc1361db0f [2024-11-21 20:48:19,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 20:48:19,925 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 20:48:19,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 20:48:19,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 20:48:19,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 20:48:19,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:48:19" (1/1) ... [2024-11-21 20:48:19,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e07b91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:19, skipping insertion in model container [2024-11-21 20:48:19,935 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:48:19" (1/1) ... [2024-11-21 20:48:19,957 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 20:48:20,119 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-tiling/tcpy.c[395,408] [2024-11-21 20:48:20,137 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:48:20,145 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 20:48:20,171 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-tiling/tcpy.c[395,408] [2024-11-21 20:48:20,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:48:20,211 INFO L204 MainTranslator]: Completed translation [2024-11-21 20:48:20,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20 WrapperNode [2024-11-21 20:48:20,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 20:48:20,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 20:48:20,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 20:48:20,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 20:48:20,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,271 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2024-11-21 20:48:20,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 20:48:20,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 20:48:20,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 20:48:20,275 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 20:48:20,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,287 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,307 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 3, 4]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 3 writes are split as follows [0, 0, 2, 1]. [2024-11-21 20:48:20,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,312 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,319 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 20:48:20,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 20:48:20,330 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 20:48:20,330 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 20:48:20,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (1/1) ... [2024-11-21 20:48:20,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:48:20,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:20,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-21 20:48:20,371 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 [2024-11-21 20:48:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 20:48:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 20:48:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 20:48:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 20:48:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-21 20:48:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 20:48:20,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 20:48:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 20:48:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 20:48:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-21 20:48:20,478 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 20:48:20,479 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 20:48:20,644 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-21 20:48:20,648 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 20:48:20,663 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 20:48:20,664 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-21 20:48:20,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:48:20 BoogieIcfgContainer [2024-11-21 20:48:20,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 20:48:20,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 20:48:20,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 20:48:20,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 20:48:20,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:48:19" (1/3) ... [2024-11-21 20:48:20,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b270ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:48:20, skipping insertion in model container [2024-11-21 20:48:20,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:48:20" (2/3) ... [2024-11-21 20:48:20,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b270ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:48:20, skipping insertion in model container [2024-11-21 20:48:20,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:48:20" (3/3) ... [2024-11-21 20:48:20,677 INFO L112 eAbstractionObserver]: Analyzing ICFG tcpy.c [2024-11-21 20:48:20,694 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 20:48:20,695 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 20:48:20,748 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 20:48:20,754 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;@51e0c316, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 20:48:20,755 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 20:48:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-21 20:48:20,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:20,764 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:20,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:20,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1608152958, now seen corresponding path program 1 times [2024-11-21 20:48:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996576065] [2024-11-21 20:48:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:20,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:20,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996576065] [2024-11-21 20:48:20,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996576065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:48:20,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:48:20,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 20:48:20,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127848057] [2024-11-21 20:48:20,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:48:20,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 20:48:20,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 20:48:21,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 20:48:21,018 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:21,032 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2024-11-21 20:48:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 20:48:21,035 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-11-21 20:48:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:21,041 INFO L225 Difference]: With dead ends: 39 [2024-11-21 20:48:21,042 INFO L226 Difference]: Without dead ends: 17 [2024-11-21 20:48:21,045 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 [2024-11-21 20:48:21,049 INFO L432 NwaCegarLoop]: 26 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, 26 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 [2024-11-21 20:48:21,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:48:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-21 20:48:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-21 20:48:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-21 20:48:21,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2024-11-21 20:48:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:21,081 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-21 20:48:21,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-21 20:48:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-21 20:48:21,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:21,083 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:21,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 20:48:21,084 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:21,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1873320706, now seen corresponding path program 1 times [2024-11-21 20:48:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:21,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653631843] [2024-11-21 20:48:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:21,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:21,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653631843] [2024-11-21 20:48:21,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653631843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:48:21,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:48:21,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:48:21,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205009632] [2024-11-21 20:48:21,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:48:21,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:48:21,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:48:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:48:21,285 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:21,348 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-21 20:48:21,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:48:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-11-21 20:48:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:21,350 INFO L225 Difference]: With dead ends: 31 [2024-11-21 20:48:21,350 INFO L226 Difference]: Without dead ends: 19 [2024-11-21 20:48:21,352 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:48:21,353 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:21,353 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:48:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-21 20:48:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-11-21 20:48:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-21 20:48:21,359 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2024-11-21 20:48:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:21,359 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-21 20:48:21,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-21 20:48:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-21 20:48:21,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:21,361 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:21,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 20:48:21,362 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:21,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash -270521828, now seen corresponding path program 1 times [2024-11-21 20:48:21,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:21,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846901803] [2024-11-21 20:48:21,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:21,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846901803] [2024-11-21 20:48:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846901803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358427921] [2024-11-21 20:48:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:21,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:21,536 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) [2024-11-21 20:48:21,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-21 20:48:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:21,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-21 20:48:21,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:21,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:21,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358427921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:21,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:21,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-21 20:48:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508137352] [2024-11-21 20:48:21,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:21,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-21 20:48:21,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-21 20:48:21,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:48:21,723 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:21,782 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-21 20:48:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 20:48:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2024-11-21 20:48:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:21,783 INFO L225 Difference]: With dead ends: 33 [2024-11-21 20:48:21,783 INFO L226 Difference]: Without dead ends: 21 [2024-11-21 20:48:21,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-21 20:48:21,785 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:21,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:48:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-21 20:48:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-11-21 20:48:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-21 20:48:21,793 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2024-11-21 20:48:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:21,793 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-21 20:48:21,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-21 20:48:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-21 20:48:21,794 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:21,794 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:21,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-21 20:48:21,996 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 [2024-11-21 20:48:21,997 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:21,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:21,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1874059334, now seen corresponding path program 2 times [2024-11-21 20:48:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:21,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405797917] [2024-11-21 20:48:21,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:48:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:22,020 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-21 20:48:22,024 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405797917] [2024-11-21 20:48:22,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405797917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:48:22,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:48:22,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-21 20:48:22,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358940674] [2024-11-21 20:48:22,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:48:22,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 20:48:22,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 20:48:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-21 20:48:22,214 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2024-11-21 20:48:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:22,254 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-21 20:48:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 20:48:22,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 16 [2024-11-21 20:48:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:22,256 INFO L225 Difference]: With dead ends: 35 [2024-11-21 20:48:22,256 INFO L226 Difference]: Without dead ends: 28 [2024-11-21 20:48:22,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-21 20:48:22,257 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:22,258 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:48:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-21 20:48:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2024-11-21 20:48:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2024-11-21 20:48:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-21 20:48:22,265 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2024-11-21 20:48:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:22,266 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-21 20:48:22,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2024-11-21 20:48:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-21 20:48:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-21 20:48:22,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:22,268 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:22,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-21 20:48:22,269 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:22,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:22,271 INFO L85 PathProgramCache]: Analyzing trace with hash 265660728, now seen corresponding path program 1 times [2024-11-21 20:48:22,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:22,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520039899] [2024-11-21 20:48:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:22,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520039899] [2024-11-21 20:48:22,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520039899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884767058] [2024-11-21 20:48:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:22,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:22,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:22,704 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) [2024-11-21 20:48:22,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-21 20:48:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:22,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-21 20:48:22,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:23,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-21 20:48:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:23,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:23,262 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2024-11-21 20:48:23,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2024-11-21 20:48:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884767058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:23,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:23,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 17 [2024-11-21 20:48:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128574153] [2024-11-21 20:48:23,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:23,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-21 20:48:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-21 20:48:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-21 20:48:23,294 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2024-11-21 20:48:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:23,554 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-21 20:48:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 20:48:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) Word has length 18 [2024-11-21 20:48:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:23,558 INFO L225 Difference]: With dead ends: 28 [2024-11-21 20:48:23,558 INFO L226 Difference]: Without dead ends: 26 [2024-11-21 20:48:23,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2024-11-21 20:48:23,559 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:23,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:48:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-21 20:48:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-11-21 20:48:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-21 20:48:23,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2024-11-21 20:48:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:23,566 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-21 20:48:23,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2024-11-21 20:48:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-21 20:48:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-21 20:48:23,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:23,567 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:23,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-21 20:48:23,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:23,773 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:23,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1994055598, now seen corresponding path program 1 times [2024-11-21 20:48:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:23,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178805145] [2024-11-21 20:48:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:23,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178805145] [2024-11-21 20:48:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178805145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629210624] [2024-11-21 20:48:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:48:24,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:24,343 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) [2024-11-21 20:48:24,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-21 20:48:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:24,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-21 20:48:24,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:24,476 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 [2024-11-21 20:48:24,574 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 24 treesize of output 25 [2024-11-21 20:48:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:24,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:24,836 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 53 treesize of output 51 [2024-11-21 20:48:24,843 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 102 treesize of output 98 [2024-11-21 20:48:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629210624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:25,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:25,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2024-11-21 20:48:25,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733101085] [2024-11-21 20:48:25,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:25,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-21 20:48:25,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:25,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-21 20:48:25,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-11-21 20:48:25,124 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 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) [2024-11-21 20:48:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:25,707 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2024-11-21 20:48:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-21 20:48:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-21 20:48:25,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:25,709 INFO L225 Difference]: With dead ends: 82 [2024-11-21 20:48:25,709 INFO L226 Difference]: Without dead ends: 71 [2024-11-21 20:48:25,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1701, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 20:48:25,710 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:25,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 127 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:48:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-21 20:48:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2024-11-21 20:48:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-21 20:48:25,720 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 22 [2024-11-21 20:48:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:25,720 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-21 20:48:25,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 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) [2024-11-21 20:48:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-21 20:48:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-21 20:48:25,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:25,721 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:25,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-21 20:48:25,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:25,922 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:25,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash -757863644, now seen corresponding path program 2 times [2024-11-21 20:48:25,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217999476] [2024-11-21 20:48:25,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:48:25,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:25,950 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:48:25,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:48:26,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:26,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217999476] [2024-11-21 20:48:26,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217999476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:26,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171713943] [2024-11-21 20:48:26,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:48:26,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:26,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:26,073 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) [2024-11-21 20:48:26,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-21 20:48:26,145 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:48:26,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:26,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-21 20:48:26,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:48:26,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:48:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171713943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:26,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:26,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-21 20:48:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513834341] [2024-11-21 20:48:26,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:26,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 20:48:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:26,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 20:48:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-21 20:48:26,299 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:26,415 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-11-21 20:48:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 20:48:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-21 20:48:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:26,416 INFO L225 Difference]: With dead ends: 86 [2024-11-21 20:48:26,416 INFO L226 Difference]: Without dead ends: 64 [2024-11-21 20:48:26,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-21 20:48:26,417 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:26,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 65 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:48:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-21 20:48:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 38. [2024-11-21 20:48:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-21 20:48:26,425 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2024-11-21 20:48:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:26,425 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-21 20:48:26,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-21 20:48:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-21 20:48:26,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:26,426 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:26,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-21 20:48:26,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:26,631 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:26,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1750966422, now seen corresponding path program 3 times [2024-11-21 20:48:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:26,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535014513] [2024-11-21 20:48:26,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:48:26,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:26,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-21 20:48:26,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 20:48:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535014513] [2024-11-21 20:48:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535014513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432641926] [2024-11-21 20:48:27,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:48:27,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:27,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:27,226 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) [2024-11-21 20:48:27,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-21 20:48:27,296 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-21 20:48:27,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:27,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-21 20:48:27,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:27,443 INFO L349 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2024-11-21 20:48:27,444 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 1 case distinctions, treesize of input 43 treesize of output 44 [2024-11-21 20:48:27,872 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-11-21 20:48:27,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 51 [2024-11-21 20:48:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-21 20:48:27,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:48:27,884 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 46 treesize of output 20 [2024-11-21 20:48:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 20:48:27,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:28,155 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2024-11-21 20:48:28,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2024-11-21 20:48:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-21 20:48:28,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432641926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:28,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:28,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2024-11-21 20:48:28,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402819379] [2024-11-21 20:48:28,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:28,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-21 20:48:28,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:28,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-21 20:48:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-11-21 20:48:28,382 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:29,279 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2024-11-21 20:48:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-21 20:48:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2024-11-21 20:48:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:29,280 INFO L225 Difference]: With dead ends: 97 [2024-11-21 20:48:29,280 INFO L226 Difference]: Without dead ends: 78 [2024-11-21 20:48:29,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=1801, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 20:48:29,282 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:29,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 112 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:48:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-21 20:48:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2024-11-21 20:48:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-21 20:48:29,292 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 26 [2024-11-21 20:48:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:29,292 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-21 20:48:29,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-21 20:48:29,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-21 20:48:29,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:29,294 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:29,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-21 20:48:29,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:29,495 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:29,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1654454336, now seen corresponding path program 4 times [2024-11-21 20:48:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066692621] [2024-11-21 20:48:29,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:48:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:29,515 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:48:29,515 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 20:48:29,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066692621] [2024-11-21 20:48:29,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066692621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353277937] [2024-11-21 20:48:29,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:48:29,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:29,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:29,948 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) [2024-11-21 20:48:29,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-21 20:48:30,011 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:48:30,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:30,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-21 20:48:30,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:30,100 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2024-11-21 20:48:30,100 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 1 case distinctions, treesize of input 36 treesize of output 37 [2024-11-21 20:48:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 20:48:30,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:30,697 INFO L349 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2024-11-21 20:48:30,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2024-11-21 20:48:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-21 20:48:30,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353277937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:30,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:30,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2024-11-21 20:48:30,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370320541] [2024-11-21 20:48:30,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:30,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-21 20:48:30,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-21 20:48:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2024-11-21 20:48:30,822 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:31,827 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2024-11-21 20:48:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-21 20:48:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-21 20:48:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:31,829 INFO L225 Difference]: With dead ends: 133 [2024-11-21 20:48:31,829 INFO L226 Difference]: Without dead ends: 131 [2024-11-21 20:48:31,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=810, Invalid=2850, Unknown=0, NotChecked=0, Total=3660 [2024-11-21 20:48:31,831 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 360 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:31,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 191 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:48:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-21 20:48:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2024-11-21 20:48:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 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) [2024-11-21 20:48:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2024-11-21 20:48:31,849 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 30 [2024-11-21 20:48:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:31,849 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2024-11-21 20:48:31,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2024-11-21 20:48:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-21 20:48:31,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:31,850 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:31,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-21 20:48:32,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:32,055 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:32,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1751957530, now seen corresponding path program 5 times [2024-11-21 20:48:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952535912] [2024-11-21 20:48:32,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:48:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:32,090 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-21 20:48:32,090 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 20:48:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952535912] [2024-11-21 20:48:32,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952535912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280848775] [2024-11-21 20:48:32,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:48:32,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:32,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:32,330 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) [2024-11-21 20:48:32,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-21 20:48:32,444 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-21 20:48:32,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:32,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-21 20:48:32,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 20:48:32,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 20:48:32,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280848775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:32,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:32,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2024-11-21 20:48:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034275715] [2024-11-21 20:48:32,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:32,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-21 20:48:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-21 20:48:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2024-11-21 20:48:32,770 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:33,031 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2024-11-21 20:48:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-21 20:48:33,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2024-11-21 20:48:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:33,032 INFO L225 Difference]: With dead ends: 220 [2024-11-21 20:48:33,032 INFO L226 Difference]: Without dead ends: 186 [2024-11-21 20:48:33,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2024-11-21 20:48:33,033 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 173 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:33,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 113 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:48:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-21 20:48:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 77. [2024-11-21 20:48:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2024-11-21 20:48:33,058 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 30 [2024-11-21 20:48:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:33,058 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2024-11-21 20:48:33,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2024-11-21 20:48:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-21 20:48:33,059 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:33,059 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:33,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-21 20:48:33,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:33,260 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:33,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1741908662, now seen corresponding path program 6 times [2024-11-21 20:48:33,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647603103] [2024-11-21 20:48:33,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 20:48:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:33,285 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-21 20:48:33,286 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:33,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:33,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647603103] [2024-11-21 20:48:33,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647603103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:33,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601077097] [2024-11-21 20:48:33,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 20:48:33,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:33,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:33,422 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) [2024-11-21 20:48:33,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-21 20:48:33,503 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-21 20:48:33,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:33,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-21 20:48:33,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:33,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:48:33,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601077097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:33,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:33,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-21 20:48:33,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656157101] [2024-11-21 20:48:33,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:33,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-21 20:48:33,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:33,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-21 20:48:33,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-21 20:48:33,703 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:33,806 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2024-11-21 20:48:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-21 20:48:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-21 20:48:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:33,808 INFO L225 Difference]: With dead ends: 145 [2024-11-21 20:48:33,808 INFO L226 Difference]: Without dead ends: 104 [2024-11-21 20:48:33,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-21 20:48:33,808 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:33,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 51 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:48:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-21 20:48:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2024-11-21 20:48:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-11-21 20:48:33,829 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 34 [2024-11-21 20:48:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:33,829 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-11-21 20:48:33,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-11-21 20:48:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-21 20:48:33,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:33,830 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:33,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-21 20:48:34,030 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,SelfDestructingSolverStorable10 [2024-11-21 20:48:34,031 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:34,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash -693288030, now seen corresponding path program 7 times [2024-11-21 20:48:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139544897] [2024-11-21 20:48:34,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 20:48:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139544897] [2024-11-21 20:48:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139544897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846089855] [2024-11-21 20:48:35,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 20:48:35,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:35,020 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) [2024-11-21 20:48:35,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-21 20:48:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:48:35,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-21 20:48:35,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:35,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-21 20:48:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:35,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:35,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:48:35,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-21 20:48:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:35,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:36,002 INFO L349 Elim1Store]: treesize reduction 20, result has 76.5 percent of original size [2024-11-21 20:48:36,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 111 [2024-11-21 20:48:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:36,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846089855] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:36,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:36,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 44 [2024-11-21 20:48:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519281772] [2024-11-21 20:48:36,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:36,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-21 20:48:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-21 20:48:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2024-11-21 20:48:36,103 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:38,726 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2024-11-21 20:48:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-21 20:48:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-21 20:48:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:38,729 INFO L225 Difference]: With dead ends: 202 [2024-11-21 20:48:38,729 INFO L226 Difference]: Without dead ends: 166 [2024-11-21 20:48:38,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1602, Invalid=9110, Unknown=0, NotChecked=0, Total=10712 [2024-11-21 20:48:38,733 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 657 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:38,734 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 497 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-21 20:48:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-21 20:48:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 80. [2024-11-21 20:48:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2024-11-21 20:48:38,764 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 34 [2024-11-21 20:48:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:38,764 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2024-11-21 20:48:38,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2024-11-21 20:48:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-21 20:48:38,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:38,767 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:38,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-21 20:48:38,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:38,967 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:38,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -837130924, now seen corresponding path program 8 times [2024-11-21 20:48:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:38,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6112712] [2024-11-21 20:48:38,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:48:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:38,986 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:48:38,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:39,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6112712] [2024-11-21 20:48:39,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6112712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50245683] [2024-11-21 20:48:39,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:48:39,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:39,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:39,839 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) [2024-11-21 20:48:39,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-21 20:48:39,922 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:48:39,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:39,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-21 20:48:39,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:40,027 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 [2024-11-21 20:48:40,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2024-11-21 20:48:40,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:48:40,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2024-11-21 20:48:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:40,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:40,906 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 93 treesize of output 91 [2024-11-21 20:48:40,910 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 15170 treesize of output 15042 [2024-11-21 20:48:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:41,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50245683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:41,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:41,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 20] total 50 [2024-11-21 20:48:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849419163] [2024-11-21 20:48:41,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:41,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-21 20:48:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-21 20:48:41,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2113, Unknown=0, NotChecked=0, Total=2450 [2024-11-21 20:48:41,276 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:42,677 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2024-11-21 20:48:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-21 20:48:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2024-11-21 20:48:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:42,678 INFO L225 Difference]: With dead ends: 178 [2024-11-21 20:48:42,678 INFO L226 Difference]: Without dead ends: 137 [2024-11-21 20:48:42,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1250, Invalid=5556, Unknown=0, NotChecked=0, Total=6806 [2024-11-21 20:48:42,680 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 383 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:42,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 265 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 20:48:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-21 20:48:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2024-11-21 20:48:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2024-11-21 20:48:42,700 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 36 [2024-11-21 20:48:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:42,701 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2024-11-21 20:48:42,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2024-11-21 20:48:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-21 20:48:42,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:42,702 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:42,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-21 20:48:42,902 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,SelfDestructingSolverStorable12 [2024-11-21 20:48:42,902 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:42,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1640463246, now seen corresponding path program 9 times [2024-11-21 20:48:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:42,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785875541] [2024-11-21 20:48:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:48:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:42,946 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 20:48:42,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785875541] [2024-11-21 20:48:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785875541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293263133] [2024-11-21 20:48:43,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:48:43,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:43,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:43,731 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) [2024-11-21 20:48:43,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-21 20:48:43,857 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-21 20:48:43,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:43,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-21 20:48:43,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:44,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:44,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-21 20:48:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:44,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:44,765 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2024-11-21 20:48:44,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2024-11-21 20:48:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:45,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293263133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:45,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:45,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2024-11-21 20:48:45,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606719845] [2024-11-21 20:48:45,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:45,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-21 20:48:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-21 20:48:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2024-11-21 20:48:45,088 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 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) [2024-11-21 20:48:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:45,947 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2024-11-21 20:48:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-21 20:48:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 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 [2024-11-21 20:48:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:45,949 INFO L225 Difference]: With dead ends: 211 [2024-11-21 20:48:45,949 INFO L226 Difference]: Without dead ends: 209 [2024-11-21 20:48:45,950 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=694, Invalid=3212, Unknown=0, NotChecked=0, Total=3906 [2024-11-21 20:48:45,951 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:45,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 260 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 20:48:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-21 20:48:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 97. [2024-11-21 20:48:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2024-11-21 20:48:45,977 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 42 [2024-11-21 20:48:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:45,978 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2024-11-21 20:48:45,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 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) [2024-11-21 20:48:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2024-11-21 20:48:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-21 20:48:45,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:45,979 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:45,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-21 20:48:46,179 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,SelfDestructingSolverStorable13 [2024-11-21 20:48:46,179 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:46,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:46,180 INFO L85 PathProgramCache]: Analyzing trace with hash -61892860, now seen corresponding path program 10 times [2024-11-21 20:48:46,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:46,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592727584] [2024-11-21 20:48:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:48:46,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:46,201 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:48:46,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:46,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592727584] [2024-11-21 20:48:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592727584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222907506] [2024-11-21 20:48:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:48:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:46,855 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) [2024-11-21 20:48:46,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-21 20:48:46,945 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:48:46,945 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:46,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-21 20:48:46,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:47,055 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2024-11-21 20:48:47,056 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 1 case distinctions, treesize of input 36 treesize of output 37 [2024-11-21 20:48:47,145 INFO L349 Elim1Store]: treesize reduction 89, result has 32.6 percent of original size [2024-11-21 20:48:47,146 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 4 case distinctions, treesize of input 73 treesize of output 79 [2024-11-21 20:48:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:47,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:48,259 INFO L349 Elim1Store]: treesize reduction 94, result has 18.3 percent of original size [2024-11-21 20:48:48,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 99 treesize of output 70 [2024-11-21 20:48:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-21 20:48:48,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222907506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:48,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 44 [2024-11-21 20:48:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148797008] [2024-11-21 20:48:48,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:48,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-21 20:48:48,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:48,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-21 20:48:48,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2024-11-21 20:48:48,392 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:51,134 INFO L93 Difference]: Finished difference Result 267 states and 288 transitions. [2024-11-21 20:48:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-21 20:48:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-21 20:48:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:51,135 INFO L225 Difference]: With dead ends: 267 [2024-11-21 20:48:51,135 INFO L226 Difference]: Without dead ends: 265 [2024-11-21 20:48:51,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1846, Invalid=7660, Unknown=0, NotChecked=0, Total=9506 [2024-11-21 20:48:51,138 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 365 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:51,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 411 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-21 20:48:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-21 20:48:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 148. [2024-11-21 20:48:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1156462585034013) internal successors, (164), 147 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) [2024-11-21 20:48:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 164 transitions. [2024-11-21 20:48:51,182 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 164 transitions. Word has length 46 [2024-11-21 20:48:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:51,182 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 164 transitions. [2024-11-21 20:48:51,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 164 transitions. [2024-11-21 20:48:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 20:48:51,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:51,183 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:51,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-21 20:48:51,383 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,SelfDestructingSolverStorable14 [2024-11-21 20:48:51,383 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:51,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1781463174, now seen corresponding path program 11 times [2024-11-21 20:48:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:51,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354113615] [2024-11-21 20:48:51,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:48:51,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:51,440 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-21 20:48:51,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:52,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354113615] [2024-11-21 20:48:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354113615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469345512] [2024-11-21 20:48:52,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:48:52,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:52,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:52,754 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) [2024-11-21 20:48:52,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-21 20:48:53,004 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-21 20:48:53,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:53,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-21 20:48:53,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:53,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-21 20:48:53,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:48:53,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-21 20:48:53,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:48:53,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:48:53,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2024-11-21 20:48:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:54,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:55,532 INFO L349 Elim1Store]: treesize reduction 30, result has 81.6 percent of original size [2024-11-21 20:48:55,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 198 [2024-11-21 20:48:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:48:56,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469345512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:56,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:56,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 73 [2024-11-21 20:48:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585901879] [2024-11-21 20:48:56,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:56,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-21 20:48:56,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-21 20:48:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2024-11-21 20:48:56,119 INFO L87 Difference]: Start difference. First operand 148 states and 164 transitions. Second operand has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 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) [2024-11-21 20:48:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:48:58,386 INFO L93 Difference]: Finished difference Result 240 states and 257 transitions. [2024-11-21 20:48:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-21 20:48:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 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) Word has length 50 [2024-11-21 20:48:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:48:58,387 INFO L225 Difference]: With dead ends: 240 [2024-11-21 20:48:58,387 INFO L226 Difference]: Without dead ends: 199 [2024-11-21 20:48:58,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1725, Invalid=9195, Unknown=0, NotChecked=0, Total=10920 [2024-11-21 20:48:58,389 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 276 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-21 20:48:58,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 428 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-21 20:48:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-21 20:48:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 165. [2024-11-21 20:48:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.103658536585366) internal successors, (181), 164 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:48:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2024-11-21 20:48:58,464 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 50 [2024-11-21 20:48:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:48:58,464 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2024-11-21 20:48:58,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 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) [2024-11-21 20:48:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2024-11-21 20:48:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-21 20:48:58,465 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:48:58,466 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:48:58,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-21 20:48:58,667 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,SelfDestructingSolverStorable15 [2024-11-21 20:48:58,667 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:48:58,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:48:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 286281670, now seen corresponding path program 12 times [2024-11-21 20:48:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:48:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631311216] [2024-11-21 20:48:58,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 20:48:58,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:48:58,715 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-21 20:48:58,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 20:48:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:48:59,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631311216] [2024-11-21 20:48:59,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631311216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:48:59,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988931222] [2024-11-21 20:48:59,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 20:48:59,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:48:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:48:59,100 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) [2024-11-21 20:48:59,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-21 20:48:59,347 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-21 20:48:59,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:48:59,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-21 20:48:59,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:48:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 20:48:59,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:48:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-21 20:48:59,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988931222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:48:59,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:48:59,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2024-11-21 20:48:59,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346036044] [2024-11-21 20:48:59,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:48:59,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-21 20:48:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:48:59,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-21 20:48:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2024-11-21 20:48:59,878 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:49:00,513 INFO L93 Difference]: Finished difference Result 454 states and 480 transitions. [2024-11-21 20:49:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-21 20:49:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 50 [2024-11-21 20:49:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:49:00,515 INFO L225 Difference]: With dead ends: 454 [2024-11-21 20:49:00,516 INFO L226 Difference]: Without dead ends: 364 [2024-11-21 20:49:00,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=849, Invalid=2013, Unknown=0, NotChecked=0, Total=2862 [2024-11-21 20:49:00,517 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 321 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 20:49:00,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 225 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 20:49:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-21 20:49:00,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 148. [2024-11-21 20:49:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 147 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) [2024-11-21 20:49:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2024-11-21 20:49:00,570 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 50 [2024-11-21 20:49:00,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:49:00,570 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2024-11-21 20:49:00,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:00,570 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2024-11-21 20:49:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-21 20:49:00,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:49:00,571 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:49:00,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-21 20:49:00,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:00,772 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:49:00,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:49:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash -899736190, now seen corresponding path program 13 times [2024-11-21 20:49:00,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:49:00,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434233470] [2024-11-21 20:49:00,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 20:49:00,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:49:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:49:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 1 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:49:02,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:49:02,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434233470] [2024-11-21 20:49:02,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434233470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:49:02,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956798796] [2024-11-21 20:49:02,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 20:49:02,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:02,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:49:02,269 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) [2024-11-21 20:49:02,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-21 20:49:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:49:02,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-21 20:49:02,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:49:03,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:03,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-21 20:49:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:03,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:49:03,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2024-11-21 20:49:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 25 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:49:03,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:49:03,972 INFO L349 Elim1Store]: treesize reduction 20, result has 76.5 percent of original size [2024-11-21 20:49:03,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 111 [2024-11-21 20:49:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-21 20:49:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956798796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:49:04,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:49:04,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 14] total 64 [2024-11-21 20:49:04,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106760188] [2024-11-21 20:49:04,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:49:04,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-21 20:49:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:49:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-21 20:49:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=3694, Unknown=0, NotChecked=0, Total=4032 [2024-11-21 20:49:04,184 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 64 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:49:08,768 INFO L93 Difference]: Finished difference Result 398 states and 427 transitions. [2024-11-21 20:49:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-21 20:49:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-21 20:49:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:49:08,770 INFO L225 Difference]: With dead ends: 398 [2024-11-21 20:49:08,770 INFO L226 Difference]: Without dead ends: 298 [2024-11-21 20:49:08,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5351 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1749, Invalid=16883, Unknown=0, NotChecked=0, Total=18632 [2024-11-21 20:49:08,773 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 954 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 3609 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 3839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 3609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-21 20:49:08,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 1396 Invalid, 3839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 3609 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-21 20:49:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-21 20:49:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 124. [2024-11-21 20:49:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2024-11-21 20:49:08,829 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 54 [2024-11-21 20:49:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:49:08,829 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2024-11-21 20:49:08,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.140625) internal successors, (137), 64 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2024-11-21 20:49:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-21 20:49:08,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:49:08,830 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:49:08,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-21 20:49:09,030 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,SelfDestructingSolverStorable17 [2024-11-21 20:49:09,030 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:49:09,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:49:09,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1578842124, now seen corresponding path program 14 times [2024-11-21 20:49:09,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:49:09,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433949991] [2024-11-21 20:49:09,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:49:09,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:49:09,049 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:49:09,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:49:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-21 20:49:09,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:49:09,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433949991] [2024-11-21 20:49:09,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433949991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:49:09,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173545211] [2024-11-21 20:49:09,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:49:09,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:09,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:49:09,442 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) [2024-11-21 20:49:09,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-21 20:49:09,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:49:09,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:49:09,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-21 20:49:09,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:49:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-21 20:49:09,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:49:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-21 20:49:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173545211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:49:10,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:49:10,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2024-11-21 20:49:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089981195] [2024-11-21 20:49:10,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:49:10,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-21 20:49:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:49:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-21 20:49:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2024-11-21 20:49:10,074 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 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) [2024-11-21 20:49:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:49:10,428 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2024-11-21 20:49:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-21 20:49:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 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 58 [2024-11-21 20:49:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:49:10,429 INFO L225 Difference]: With dead ends: 245 [2024-11-21 20:49:10,430 INFO L226 Difference]: Without dead ends: 214 [2024-11-21 20:49:10,430 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=1749, Unknown=0, NotChecked=0, Total=2352 [2024-11-21 20:49:10,430 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 252 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:49:10,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 153 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:49:10,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-21 20:49:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 124. [2024-11-21 20:49:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2024-11-21 20:49:10,478 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 58 [2024-11-21 20:49:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:49:10,479 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2024-11-21 20:49:10,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 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) [2024-11-21 20:49:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2024-11-21 20:49:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-21 20:49:10,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:49:10,480 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:49:10,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-21 20:49:10,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:10,681 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:49:10,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:49:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1822181206, now seen corresponding path program 15 times [2024-11-21 20:49:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:49:10,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997821949] [2024-11-21 20:49:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:49:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:49:10,723 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-21 20:49:10,724 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:49:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-21 20:49:12,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:49:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997821949] [2024-11-21 20:49:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997821949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:49:12,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191681683] [2024-11-21 20:49:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:49:12,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:12,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:49:12,083 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) [2024-11-21 20:49:12,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-21 20:49:12,393 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-21 20:49:12,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:49:12,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-21 20:49:12,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:49:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2024-11-21 20:49:12,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,700 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2024-11-21 20:49:12,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2024-11-21 20:49:12,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:49:12,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:49:12,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2024-11-21 20:49:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-21 20:49:13,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:49:14,839 INFO L349 Elim1Store]: treesize reduction 126, result has 22.7 percent of original size [2024-11-21 20:49:14,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 102 [2024-11-21 20:49:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-21 20:49:15,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191681683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:49:15,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:49:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20] total 58 [2024-11-21 20:49:15,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662820996] [2024-11-21 20:49:15,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:49:15,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-21 20:49:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:49:15,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-21 20:49:15,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2921, Unknown=0, NotChecked=0, Total=3306 [2024-11-21 20:49:15,077 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand has 58 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 58 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:49:18,630 INFO L93 Difference]: Finished difference Result 224 states and 237 transitions. [2024-11-21 20:49:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-21 20:49:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 58 states have internal predecessors, (131), 0 states have call successors, (0), 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 60 [2024-11-21 20:49:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:49:18,632 INFO L225 Difference]: With dead ends: 224 [2024-11-21 20:49:18,632 INFO L226 Difference]: Without dead ends: 222 [2024-11-21 20:49:18,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1623, Invalid=9089, Unknown=0, NotChecked=0, Total=10712 [2024-11-21 20:49:18,633 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 351 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-21 20:49:18,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 513 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-21 20:49:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-11-21 20:49:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 135. [2024-11-21 20:49:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0970149253731343) internal successors, (147), 134 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) [2024-11-21 20:49:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 147 transitions. [2024-11-21 20:49:18,705 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 147 transitions. Word has length 60 [2024-11-21 20:49:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:49:18,705 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 147 transitions. [2024-11-21 20:49:18,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2586206896551726) internal successors, (131), 58 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:49:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 147 transitions. [2024-11-21 20:49:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-21 20:49:18,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:49:18,706 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:49:18,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-21 20:49:18,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:18,907 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:49:18,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:49:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1561323040, now seen corresponding path program 16 times [2024-11-21 20:49:18,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:49:18,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812371985] [2024-11-21 20:49:18,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:49:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:49:18,926 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:49:18,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:49:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 60 proven. 54 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-21 20:49:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:49:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812371985] [2024-11-21 20:49:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812371985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:49:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366059] [2024-11-21 20:49:19,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:49:19,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:49:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:49:19,849 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) [2024-11-21 20:49:19,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-21 20:49:19,968 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:49:19,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:49:19,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-21 20:49:19,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:49:20,052 INFO L349 Elim1Store]: treesize reduction 41, result has 39.7 percent of original size [2024-11-21 20:49:20,053 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 1 case distinctions, treesize of input 46 treesize of output 47 [2024-11-21 20:49:20,138 INFO L349 Elim1Store]: treesize reduction 124, result has 30.3 percent of original size [2024-11-21 20:49:20,139 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 4 case distinctions, treesize of input 93 treesize of output 99 [2024-11-21 20:49:20,274 INFO L349 Elim1Store]: treesize reduction 241, result has 25.2 percent of original size [2024-11-21 20:49:20,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 141 treesize of output 153 [2024-11-21 20:49:20,513 INFO L349 Elim1Store]: treesize reduction 382, result has 22.0 percent of original size [2024-11-21 20:49:20,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 189 treesize of output 207 [2024-11-21 20:49:26,822 INFO L349 Elim1Store]: treesize reduction 165, result has 1.8 percent of original size [2024-11-21 20:49:26,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 237 treesize of output 142 [2024-11-21 20:49:26,835 INFO L349 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2024-11-21 20:49:26,835 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 56 treesize of output 20 [2024-11-21 20:49:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 91 proven. 23 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-21 20:49:26,868 INFO L311 TraceCheckSpWp]: Computing backward predicates...