./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr2.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/pr2.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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-21 20:47:06,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-21 20:47:06,703 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-21 20:47:06,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-21 20:47:06,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-21 20:47:06,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-21 20:47:06,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-21 20:47:06,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-21 20:47:06,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-21 20:47:06,734 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-21 20:47:06,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-21 20:47:06,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-21 20:47:06,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-21 20:47:06,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-21 20:47:06,736 INFO L153 SettingsManager]: * Use SBE=true [2024-11-21 20:47:06,736 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-21 20:47:06,736 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-21 20:47:06,736 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-21 20:47:06,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-21 20:47:06,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-21 20:47:06,737 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-21 20:47:06,740 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-21 20:47:06,741 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-21 20:47:06,741 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-21 20:47:06,741 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-21 20:47:06,741 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-21 20:47:06,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:47:06,742 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-21 20:47:06,742 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-21 20:47:06,742 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-21 20:47:06,743 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-21 20:47:06,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-21 20:47:06,743 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-21 20:47:06,743 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-21 20:47:06,743 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-21 20:47:06,744 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-21 20:47:06,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2024-11-21 20:47:06,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-21 20:47:06,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-21 20:47:06,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-21 20:47:06,979 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-21 20:47:06,979 INFO L274 PluginConnector]: CDTParser initialized [2024-11-21 20:47:06,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2024-11-21 20:47:08,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-21 20:47:08,339 INFO L384 CDTParser]: Found 1 translation units. [2024-11-21 20:47:08,340 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2024-11-21 20:47:08,346 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3078a1ef/b06251c1e0294b58ad060a3d8d94ea05/FLAG1bf4f0316 [2024-11-21 20:47:08,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3078a1ef/b06251c1e0294b58ad060a3d8d94ea05 [2024-11-21 20:47:08,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-21 20:47:08,359 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-21 20:47:08,360 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-21 20:47:08,360 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-21 20:47:08,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-21 20:47:08,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683aa399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08, skipping insertion in model container [2024-11-21 20:47:08,366 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,382 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-21 20:47:08,502 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/pr2.c[394,407] [2024-11-21 20:47:08,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:47:08,522 INFO L200 MainTranslator]: Completed pre-run [2024-11-21 20:47:08,532 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/pr2.c[394,407] [2024-11-21 20:47:08,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-21 20:47:08,550 INFO L204 MainTranslator]: Completed translation [2024-11-21 20:47:08,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08 WrapperNode [2024-11-21 20:47:08,551 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-21 20:47:08,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-21 20:47:08,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-21 20:47:08,552 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-21 20:47:08,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,576 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-11-21 20:47:08,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-21 20:47:08,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-21 20:47:08,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-21 20:47:08,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-21 20:47:08,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,597 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 4 writes are split as follows [0, 0, 4]. [2024-11-21 20:47:08,597 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,597 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-21 20:47:08,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-21 20:47:08,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-21 20:47:08,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-21 20:47:08,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (1/1) ... [2024-11-21 20:47:08,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-21 20:47:08,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:08,634 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 20:47:08,637 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 20:47:08,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-21 20:47:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-21 20:47:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-21 20:47:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-21 20:47:08,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-21 20:47:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-21 20:47:08,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-21 20:47:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-21 20:47:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-21 20:47:08,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-21 20:47:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-21 20:47:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-21 20:47:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-21 20:47:08,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-21 20:47:08,751 INFO L238 CfgBuilder]: Building ICFG [2024-11-21 20:47:08,754 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-21 20:47:08,887 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-21 20:47:08,888 INFO L287 CfgBuilder]: Performing block encoding [2024-11-21 20:47:08,899 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-21 20:47:08,900 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-21 20:47:08,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:47:08 BoogieIcfgContainer [2024-11-21 20:47:08,901 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-21 20:47:08,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-21 20:47:08,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-21 20:47:08,904 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-21 20:47:08,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:47:08" (1/3) ... [2024-11-21 20:47:08,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d546b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:47:08, skipping insertion in model container [2024-11-21 20:47:08,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:47:08" (2/3) ... [2024-11-21 20:47:08,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d546b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:47:08, skipping insertion in model container [2024-11-21 20:47:08,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:47:08" (3/3) ... [2024-11-21 20:47:08,906 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2024-11-21 20:47:08,918 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-21 20:47:08,918 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-21 20:47:08,958 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-21 20:47:08,963 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;@2e15d6f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-21 20:47:08,963 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-21 20:47:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 20:47:08,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:08,970 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:08,971 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:08,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:08,974 INFO L85 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2024-11-21 20:47:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029040265] [2024-11-21 20:47:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:09,107 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 20:47:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029040265] [2024-11-21 20:47:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029040265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:47:09,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:47:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-21 20:47:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408146009] [2024-11-21 20:47:09,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:47:09,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-21 20:47:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-21 20:47:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-21 20:47:09,130 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 20:47:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:09,139 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2024-11-21 20:47:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-21 20:47:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-21 20:47:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:09,147 INFO L225 Difference]: With dead ends: 43 [2024-11-21 20:47:09,147 INFO L226 Difference]: Without dead ends: 19 [2024-11-21 20:47:09,149 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 20:47:09,151 INFO L432 NwaCegarLoop]: 30 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, 30 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 20:47:09,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:47:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-21 20:47:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-21 20:47:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 20:47:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-11-21 20:47:09,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2024-11-21 20:47:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:09,174 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-11-21 20:47:09,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 20:47:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-11-21 20:47:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 20:47:09,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:09,175 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:09,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-21 20:47:09,175 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:09,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2024-11-21 20:47:09,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:09,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472474656] [2024-11-21 20:47:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:09,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:09,342 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 20:47:09,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:09,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472474656] [2024-11-21 20:47:09,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472474656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:47:09,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:47:09,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-21 20:47:09,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402215890] [2024-11-21 20:47:09,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:47:09,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 20:47:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:09,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 20:47:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-21 20:47:09,350 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 20:47:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:09,367 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-21 20:47:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 20:47:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-21 20:47:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:09,369 INFO L225 Difference]: With dead ends: 23 [2024-11-21 20:47:09,369 INFO L226 Difference]: Without dead ends: 21 [2024-11-21 20:47:09,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-21 20:47:09,370 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:09,371 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:47:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-21 20:47:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-21 20:47:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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 20:47:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-21 20:47:09,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2024-11-21 20:47:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:09,375 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-21 20:47:09,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 20:47:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-21 20:47:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-21 20:47:09,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:09,376 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:09,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-21 20:47:09,376 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:09,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2024-11-21 20:47:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:09,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835435147] [2024-11-21 20:47:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:09,576 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 20:47:09,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:09,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835435147] [2024-11-21 20:47:09,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835435147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:47:09,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:47:09,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-21 20:47:09,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191453296] [2024-11-21 20:47:09,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:47:09,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-21 20:47:09,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:09,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-21 20:47:09,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-21 20:47:09,578 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 20:47:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:09,622 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-11-21 20:47:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-21 20:47:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-21 20:47:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:09,624 INFO L225 Difference]: With dead ends: 36 [2024-11-21 20:47:09,624 INFO L226 Difference]: Without dead ends: 25 [2024-11-21 20:47:09,624 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 20:47:09,626 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:09,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:47:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-21 20:47:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2024-11-21 20:47:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 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 20:47:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-21 20:47:09,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2024-11-21 20:47:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:09,633 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-21 20:47:09,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 20:47:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-21 20:47:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-21 20:47:09,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:09,634 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:09,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-21 20:47:09,634 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:09,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2024-11-21 20:47:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:09,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307840811] [2024-11-21 20:47:09,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:09,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:10,024 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 20:47:10,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307840811] [2024-11-21 20:47:10,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307840811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:10,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955087176] [2024-11-21 20:47:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:10,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:10,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:10,027 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 20:47:10,028 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 20:47:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:10,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-21 20:47:10,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:10,162 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 20:47:10,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 20:47:10,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-21 20:47:10,266 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 20:47:10,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:10,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-21 20:47:10,325 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 16 treesize of output 14 [2024-11-21 20:47:10,339 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 20:47:10,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955087176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:10,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:10,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2024-11-21 20:47:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771312189] [2024-11-21 20:47:10,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:10,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-21 20:47:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-21 20:47:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-21 20:47:10,343 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:10,759 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2024-11-21 20:47:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-21 20:47:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-21 20:47:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:10,762 INFO L225 Difference]: With dead ends: 106 [2024-11-21 20:47:10,762 INFO L226 Difference]: Without dead ends: 91 [2024-11-21 20:47:10,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2024-11-21 20:47:10,764 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 235 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:10,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 111 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:47:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-21 20:47:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 35. [2024-11-21 20:47:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 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 20:47:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2024-11-21 20:47:10,770 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 17 [2024-11-21 20:47:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:10,770 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2024-11-21 20:47:10,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2024-11-21 20:47:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-21 20:47:10,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:10,772 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:10,781 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 20:47:10,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:10,973 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:10,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2024-11-21 20:47:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326096109] [2024-11-21 20:47:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:10,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:11,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:11,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326096109] [2024-11-21 20:47:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326096109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:47:11,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:47:11,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-21 20:47:11,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8243074] [2024-11-21 20:47:11,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:47:11,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-21 20:47:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-21 20:47:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-21 20:47:11,018 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 20:47:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:11,040 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-11-21 20:47:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-21 20:47:11,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-11-21 20:47:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:11,041 INFO L225 Difference]: With dead ends: 60 [2024-11-21 20:47:11,041 INFO L226 Difference]: Without dead ends: 45 [2024-11-21 20:47:11,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-21 20:47:11,042 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:11,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:47:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-21 20:47:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2024-11-21 20:47:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-21 20:47:11,048 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 17 [2024-11-21 20:47:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:11,048 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-21 20:47:11,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 20:47:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-21 20:47:11,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-21 20:47:11,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:11,048 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:11,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-21 20:47:11,048 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:11,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2024-11-21 20:47:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:11,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130785342] [2024-11-21 20:47:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:11,260 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 20:47:11,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130785342] [2024-11-21 20:47:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130785342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:11,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522099850] [2024-11-21 20:47:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:11,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:11,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:11,264 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 20:47:11,265 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 20:47:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:11,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-21 20:47:11,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:11,364 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 11 treesize of output 7 [2024-11-21 20:47:11,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 20:47:11,408 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 20:47:11,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:11,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-21 20:47:11,456 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 14 treesize of output 12 [2024-11-21 20:47:11,470 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 20:47:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522099850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:11,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:11,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 15 [2024-11-21 20:47:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855650964] [2024-11-21 20:47:11,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:11,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-21 20:47:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-21 20:47:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-21 20:47:11,474 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 20:47:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:11,776 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-11-21 20:47:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-21 20:47:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 17 [2024-11-21 20:47:11,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:11,778 INFO L225 Difference]: With dead ends: 74 [2024-11-21 20:47:11,778 INFO L226 Difference]: Without dead ends: 72 [2024-11-21 20:47:11,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2024-11-21 20:47:11,779 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:11,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 110 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:47:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-21 20:47:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2024-11-21 20:47:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-21 20:47:11,787 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 17 [2024-11-21 20:47:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:11,787 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-21 20:47:11,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 20:47:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-21 20:47:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-21 20:47:11,787 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:11,788 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:11,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-21 20:47:11,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-21 20:47:11,988 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:11,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1629557997, now seen corresponding path program 1 times [2024-11-21 20:47:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:11,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33540267] [2024-11-21 20:47:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:12,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:12,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33540267] [2024-11-21 20:47:12,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33540267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:47:12,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:47:12,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:47:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575140887] [2024-11-21 20:47:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:47:12,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:47:12,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:47:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:47:12,014 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 20:47:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:12,024 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-11-21 20:47:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:47:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 21 [2024-11-21 20:47:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:12,025 INFO L225 Difference]: With dead ends: 62 [2024-11-21 20:47:12,025 INFO L226 Difference]: Without dead ends: 47 [2024-11-21 20:47:12,025 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 20:47:12,025 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:12,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:47:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-21 20:47:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2024-11-21 20:47:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 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 20:47:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-11-21 20:47:12,029 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2024-11-21 20:47:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:12,029 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-11-21 20:47:12,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 20:47:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-11-21 20:47:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-21 20:47:12,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:12,030 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:12,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-21 20:47:12,030 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:12,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2024-11-21 20:47:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546841502] [2024-11-21 20:47:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:12,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:12,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546841502] [2024-11-21 20:47:12,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546841502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:12,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873085908] [2024-11-21 20:47:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:12,226 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 20:47:12,227 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 20:47:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:12,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-21 20:47:12,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:12,296 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 20:47:12,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-21 20:47:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:12,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:12,421 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 19 treesize of output 17 [2024-11-21 20:47:12,426 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 18 treesize of output 14 [2024-11-21 20:47:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873085908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:12,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:12,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-21 20:47:12,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670177132] [2024-11-21 20:47:12,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:12,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-21 20:47:12,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:12,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-21 20:47:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-21 20:47:12,440 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:12,604 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2024-11-21 20:47:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-21 20:47:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-21 20:47:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:12,606 INFO L225 Difference]: With dead ends: 75 [2024-11-21 20:47:12,606 INFO L226 Difference]: Without dead ends: 65 [2024-11-21 20:47:12,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2024-11-21 20:47:12,606 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 110 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:12,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 90 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:47:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-21 20:47:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2024-11-21 20:47:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-11-21 20:47:12,611 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2024-11-21 20:47:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:12,611 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-11-21 20:47:12,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:12,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-11-21 20:47:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-21 20:47:12,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:12,612 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:12,619 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 20:47:12,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:12,817 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:12,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2024-11-21 20:47:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:12,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096081019] [2024-11-21 20:47:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:13,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:13,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096081019] [2024-11-21 20:47:13,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096081019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:13,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293599028] [2024-11-21 20:47:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:13,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:13,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:13,011 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 20:47:13,012 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 20:47:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:13,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-21 20:47:13,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:13,089 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 11 treesize of output 7 [2024-11-21 20:47:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:13,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:13,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-21 20:47:13,203 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 16 treesize of output 12 [2024-11-21 20:47:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:13,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293599028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:13,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:13,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2024-11-21 20:47:13,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395731056] [2024-11-21 20:47:13,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:13,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-21 20:47:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-21 20:47:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-21 20:47:13,218 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 20:47:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:13,404 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2024-11-21 20:47:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-21 20:47:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 23 [2024-11-21 20:47:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:13,405 INFO L225 Difference]: With dead ends: 81 [2024-11-21 20:47:13,405 INFO L226 Difference]: Without dead ends: 79 [2024-11-21 20:47:13,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-11-21 20:47:13,406 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:13,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:47:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-21 20:47:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2024-11-21 20:47:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-11-21 20:47:13,411 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2024-11-21 20:47:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:13,411 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-11-21 20:47:13,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 20:47:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-11-21 20:47:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-21 20:47:13,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:13,412 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:13,420 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 20:47:13,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:13,618 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:13,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2024-11-21 20:47:13,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:13,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507064389] [2024-11-21 20:47:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:13,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-21 20:47:13,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:13,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507064389] [2024-11-21 20:47:13,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507064389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-21 20:47:13,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-21 20:47:13,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-21 20:47:13,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075436912] [2024-11-21 20:47:13,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-21 20:47:13,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-21 20:47:13,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-21 20:47:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-21 20:47:13,643 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 20:47:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:13,655 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-11-21 20:47:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-21 20:47:13,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 27 [2024-11-21 20:47:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:13,656 INFO L225 Difference]: With dead ends: 80 [2024-11-21 20:47:13,656 INFO L226 Difference]: Without dead ends: 63 [2024-11-21 20:47:13,656 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 20:47:13,657 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:13,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-21 20:47:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-21 20:47:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2024-11-21 20:47:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-21 20:47:13,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2024-11-21 20:47:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:13,664 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-21 20:47:13,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 20:47:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-21 20:47:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-21 20:47:13,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:13,665 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:13,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-21 20:47:13,665 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:13,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2024-11-21 20:47:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363665528] [2024-11-21 20:47:13,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:47:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:13,681 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:47:13,681 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363665528] [2024-11-21 20:47:13,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363665528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989055258] [2024-11-21 20:47:13,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:47:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:13,803 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 20:47:13,804 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 20:47:13,857 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:47:13,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:13,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-21 20:47:13,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:14,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989055258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:14,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:14,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-11-21 20:47:14,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715616450] [2024-11-21 20:47:14,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:14,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-21 20:47:14,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-21 20:47:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2024-11-21 20:47:14,153 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:14,296 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2024-11-21 20:47:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 20:47:14,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-21 20:47:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:14,297 INFO L225 Difference]: With dead ends: 108 [2024-11-21 20:47:14,297 INFO L226 Difference]: Without dead ends: 72 [2024-11-21 20:47:14,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2024-11-21 20:47:14,298 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:14,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 90 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:47:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-21 20:47:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2024-11-21 20:47:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 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 20:47:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2024-11-21 20:47:14,303 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2024-11-21 20:47:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:14,303 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2024-11-21 20:47:14,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2024-11-21 20:47:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-21 20:47:14,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:14,304 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:14,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-21 20:47:14,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-21 20:47:14,505 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:14,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2024-11-21 20:47:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873904129] [2024-11-21 20:47:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:47:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:14,524 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-21 20:47:14,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:14,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873904129] [2024-11-21 20:47:14,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873904129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65425616] [2024-11-21 20:47:14,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:47:14,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:14,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:14,799 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 20:47:14,800 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 20:47:14,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-21 20:47:14,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:14,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-21 20:47:14,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:14,887 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 19 treesize of output 1 [2024-11-21 20:47:14,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-21 20:47:15,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:15,051 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 28 treesize of output 10 [2024-11-21 20:47:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:15,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:15,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-21 20:47:15,195 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 18 treesize of output 14 [2024-11-21 20:47:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65425616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:15,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 23 [2024-11-21 20:47:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360700836] [2024-11-21 20:47:15,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:15,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-21 20:47:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-21 20:47:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-21 20:47:15,203 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:15,782 INFO L93 Difference]: Finished difference Result 137 states and 153 transitions. [2024-11-21 20:47:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-21 20:47:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-21 20:47:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:15,783 INFO L225 Difference]: With dead ends: 137 [2024-11-21 20:47:15,783 INFO L226 Difference]: Without dead ends: 127 [2024-11-21 20:47:15,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-11-21 20:47:15,784 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:15,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 275 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-21 20:47:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-21 20:47:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2024-11-21 20:47:15,790 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 20:47:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2024-11-21 20:47:15,791 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 33 [2024-11-21 20:47:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:15,791 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2024-11-21 20:47:15,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2024-11-21 20:47:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-21 20:47:15,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:15,792 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:15,798 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 20:47:15,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:15,996 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:15,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2065206767, now seen corresponding path program 1 times [2024-11-21 20:47:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:15,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966164201] [2024-11-21 20:47:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:16,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:16,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966164201] [2024-11-21 20:47:16,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966164201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:16,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050711472] [2024-11-21 20:47:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-21 20:47:16,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:16,168 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 20:47:16,169 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 20:47:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:16,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-21 20:47:16,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:16,268 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 20:47:16,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-21 20:47:16,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:16,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:16,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2024-11-21 20:47:16,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:16,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-21 20:47:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 20:47:16,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:16,857 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 25 treesize of output 23 [2024-11-21 20:47:16,860 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 46 treesize of output 42 [2024-11-21 20:47:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-21 20:47:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050711472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:16,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:16,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2024-11-21 20:47:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892853383] [2024-11-21 20:47:16,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:16,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-21 20:47:16,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-21 20:47:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-11-21 20:47:16,945 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 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 20:47:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:17,642 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2024-11-21 20:47:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-21 20:47:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 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 33 [2024-11-21 20:47:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:17,643 INFO L225 Difference]: With dead ends: 126 [2024-11-21 20:47:17,643 INFO L226 Difference]: Without dead ends: 116 [2024-11-21 20:47:17,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2024-11-21 20:47:17,645 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 179 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:17,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 262 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 20:47:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-21 20:47:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 83. [2024-11-21 20:47:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 0 states have call successors, (0), 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 20:47:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2024-11-21 20:47:17,659 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 33 [2024-11-21 20:47:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:17,659 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2024-11-21 20:47:17,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 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 20:47:17,660 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2024-11-21 20:47:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-21 20:47:17,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:17,663 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:17,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-21 20:47:17,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:17,864 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:17,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 2 times [2024-11-21 20:47:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:17,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170298421] [2024-11-21 20:47:17,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:47:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:17,877 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:47:17,878 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:18,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:18,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170298421] [2024-11-21 20:47:18,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170298421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:18,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9070415] [2024-11-21 20:47:18,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:47:18,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:18,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:18,275 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 20:47:18,276 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 20:47:18,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:47:18,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:18,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-21 20:47:18,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:18,378 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 11 treesize of output 7 [2024-11-21 20:47:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:18,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:18,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-21 20:47:18,671 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 16 treesize of output 12 [2024-11-21 20:47:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9070415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:18,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 35 [2024-11-21 20:47:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248337381] [2024-11-21 20:47:18,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:18,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-21 20:47:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-21 20:47:18,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2024-11-21 20:47:18,699 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 35 states have internal predecessors, (108), 0 states have call successors, (0), 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 20:47:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:19,840 INFO L93 Difference]: Finished difference Result 195 states and 214 transitions. [2024-11-21 20:47:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-21 20:47:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 35 states have internal predecessors, (108), 0 states have call successors, (0), 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 39 [2024-11-21 20:47:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:19,844 INFO L225 Difference]: With dead ends: 195 [2024-11-21 20:47:19,844 INFO L226 Difference]: Without dead ends: 144 [2024-11-21 20:47:19,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=5101, Unknown=0, NotChecked=0, Total=6006 [2024-11-21 20:47:19,846 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 265 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:19,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 265 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 20:47:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-21 20:47:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 103. [2024-11-21 20:47:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 102 states have internal predecessors, (112), 0 states have call successors, (0), 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 20:47:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2024-11-21 20:47:19,858 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 39 [2024-11-21 20:47:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:19,858 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2024-11-21 20:47:19,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 35 states have internal predecessors, (108), 0 states have call successors, (0), 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 20:47:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2024-11-21 20:47:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-21 20:47:19,859 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:19,859 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:19,865 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 20:47:20,062 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,SelfDestructingSolverStorable13 [2024-11-21 20:47:20,062 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:20,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:20,063 INFO L85 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 4 times [2024-11-21 20:47:20,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:20,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837220859] [2024-11-21 20:47:20,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:47:20,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:20,071 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:47:20,071 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837220859] [2024-11-21 20:47:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837220859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108017005] [2024-11-21 20:47:20,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:47:20,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:20,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:20,251 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 20:47:20,252 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 20:47:20,305 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:47:20,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:20,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-21 20:47:20,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:20,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:20,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108017005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:20,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:20,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2024-11-21 20:47:20,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089175796] [2024-11-21 20:47:20,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:20,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-21 20:47:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-21 20:47:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2024-11-21 20:47:20,777 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:20,950 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2024-11-21 20:47:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-21 20:47:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-21 20:47:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:20,953 INFO L225 Difference]: With dead ends: 152 [2024-11-21 20:47:20,953 INFO L226 Difference]: Without dead ends: 116 [2024-11-21 20:47:20,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2024-11-21 20:47:20,954 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:20,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 147 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:47:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-21 20:47:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2024-11-21 20:47:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 106 states have internal predecessors, (116), 0 states have call successors, (0), 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 20:47:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2024-11-21 20:47:20,971 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 45 [2024-11-21 20:47:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:20,972 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2024-11-21 20:47:20,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2024-11-21 20:47:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 20:47:20,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:20,974 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:20,983 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 20:47:21,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-21 20:47:21,174 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:21,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 5 times [2024-11-21 20:47:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628019435] [2024-11-21 20:47:21,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:47:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:21,196 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-21 20:47:21,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:21,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:21,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628019435] [2024-11-21 20:47:21,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628019435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:21,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537162492] [2024-11-21 20:47:21,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-21 20:47:21,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:21,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:21,505 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 20:47:21,506 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 20:47:21,571 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-21 20:47:21,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:21,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-21 20:47:21,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:21,632 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 11 treesize of output 7 [2024-11-21 20:47:21,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-21 20:47:21,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:21,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-21 20:47:21,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:21,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2024-11-21 20:47:21,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:21,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 48 [2024-11-21 20:47:22,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:22,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 22 [2024-11-21 20:47:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:22,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:22,815 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 87 treesize of output 83 [2024-11-21 20:47:22,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:22,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 550 treesize of output 502 [2024-11-21 20:47:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537162492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:22,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 47 [2024-11-21 20:47:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547348006] [2024-11-21 20:47:22,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:22,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-21 20:47:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-21 20:47:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2024-11-21 20:47:22,893 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 47 states, 47 states have (on average 2.872340425531915) internal successors, (135), 47 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:26,250 INFO L93 Difference]: Finished difference Result 274 states and 296 transitions. [2024-11-21 20:47:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-21 20:47:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.872340425531915) internal successors, (135), 47 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-21 20:47:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:26,251 INFO L225 Difference]: With dead ends: 274 [2024-11-21 20:47:26,251 INFO L226 Difference]: Without dead ends: 264 [2024-11-21 20:47:26,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1617, Invalid=10373, Unknown=0, NotChecked=0, Total=11990 [2024-11-21 20:47:26,253 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 600 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:26,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 586 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-21 20:47:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-21 20:47:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 141. [2024-11-21 20:47:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1071428571428572) internal successors, (155), 140 states have internal predecessors, (155), 0 states have call successors, (0), 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 20:47:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2024-11-21 20:47:26,266 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 49 [2024-11-21 20:47:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:26,267 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2024-11-21 20:47:26,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.872340425531915) internal successors, (135), 47 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2024-11-21 20:47:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 20:47:26,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:26,268 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:26,274 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 20:47:26,468 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,SelfDestructingSolverStorable15 [2024-11-21 20:47:26,468 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:26,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -523389962, now seen corresponding path program 3 times [2024-11-21 20:47:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:26,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032165919] [2024-11-21 20:47:26,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:47:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:26,488 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 20:47:26,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032165919] [2024-11-21 20:47:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032165919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122274170] [2024-11-21 20:47:27,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-21 20:47:27,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:27,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:27,021 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 20:47:27,022 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 20:47:27,099 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-21 20:47:27,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:27,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-21 20:47:27,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:27,176 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 20:47:27,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 20:47:27,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-21 20:47:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:27,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:27,550 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 19 treesize of output 17 [2024-11-21 20:47:27,552 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 18 treesize of output 14 [2024-11-21 20:47:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:27,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122274170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:27,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:27,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 37 [2024-11-21 20:47:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041250125] [2024-11-21 20:47:27,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:27,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-21 20:47:27,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-21 20:47:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2024-11-21 20:47:27,603 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 37 states, 37 states have (on average 3.675675675675676) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:28,597 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2024-11-21 20:47:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-21 20:47:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.675675675675676) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-21 20:47:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:28,598 INFO L225 Difference]: With dead ends: 240 [2024-11-21 20:47:28,598 INFO L226 Difference]: Without dead ends: 230 [2024-11-21 20:47:28,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=3843, Unknown=0, NotChecked=0, Total=4422 [2024-11-21 20:47:28,599 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 229 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:28,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 360 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 20:47:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-21 20:47:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 134. [2024-11-21 20:47:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0977443609022557) internal successors, (146), 133 states have internal predecessors, (146), 0 states have call successors, (0), 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 20:47:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2024-11-21 20:47:28,611 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 49 [2024-11-21 20:47:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:28,611 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2024-11-21 20:47:28,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.675675675675676) internal successors, (136), 37 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-21 20:47:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2024-11-21 20:47:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-21 20:47:28,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:28,612 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:28,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-21 20:47:28,816 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,SelfDestructingSolverStorable16 [2024-11-21 20:47:28,817 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:28,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash -55832404, now seen corresponding path program 2 times [2024-11-21 20:47:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:28,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091247722] [2024-11-21 20:47:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:47:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:28,829 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:47:28,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091247722] [2024-11-21 20:47:29,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091247722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999092639] [2024-11-21 20:47:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-21 20:47:29,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:29,069 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 20:47:29,070 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 20:47:29,130 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-21 20:47:29,130 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:29,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-21 20:47:29,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:29,205 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 11 treesize of output 7 [2024-11-21 20:47:29,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-21 20:47:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:29,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:29,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-21 20:47:29,552 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 16 treesize of output 12 [2024-11-21 20:47:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:29,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999092639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:29,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:29,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2024-11-21 20:47:29,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43608007] [2024-11-21 20:47:29,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:29,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-21 20:47:29,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:29,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-21 20:47:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-21 20:47:29,564 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 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 20:47:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:30,137 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2024-11-21 20:47:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-21 20:47:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 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) Word has length 49 [2024-11-21 20:47:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:30,138 INFO L225 Difference]: With dead ends: 190 [2024-11-21 20:47:30,138 INFO L226 Difference]: Without dead ends: 188 [2024-11-21 20:47:30,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2024-11-21 20:47:30,139 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:30,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 283 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-21 20:47:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-21 20:47:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 140. [2024-11-21 20:47:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1007194244604317) internal successors, (153), 139 states have internal predecessors, (153), 0 states have call successors, (0), 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 20:47:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2024-11-21 20:47:30,152 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 49 [2024-11-21 20:47:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:30,152 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2024-11-21 20:47:30,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 30 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 20:47:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2024-11-21 20:47:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-21 20:47:30,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:30,153 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:30,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-21 20:47:30,353 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,SelfDestructingSolverStorable17 [2024-11-21 20:47:30,353 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:30,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 4 times [2024-11-21 20:47:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:30,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759334993] [2024-11-21 20:47:30,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:47:30,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:30,366 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:47:30,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:30,609 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 20:47:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759334993] [2024-11-21 20:47:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759334993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196780287] [2024-11-21 20:47:30,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-21 20:47:30,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:30,612 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 20:47:30,613 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 20:47:30,679 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-21 20:47:30,679 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:30,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-21 20:47:30,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:30,693 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 13 treesize of output 9 [2024-11-21 20:47:30,827 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 20:47:30,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:30,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-21 20:47:30,894 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 16 treesize of output 12 [2024-11-21 20:47:30,903 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 20:47:30,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196780287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:30,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:30,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2024-11-21 20:47:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563420048] [2024-11-21 20:47:30,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:30,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-21 20:47:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-21 20:47:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-11-21 20:47:30,904 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 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 20:47:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:31,688 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2024-11-21 20:47:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-21 20:47:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 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 55 [2024-11-21 20:47:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:31,690 INFO L225 Difference]: With dead ends: 220 [2024-11-21 20:47:31,690 INFO L226 Difference]: Without dead ends: 218 [2024-11-21 20:47:31,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2024-11-21 20:47:31,691 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:31,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 283 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-21 20:47:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-21 20:47:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 152. [2024-11-21 20:47:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.099337748344371) internal successors, (166), 151 states have internal predecessors, (166), 0 states have call successors, (0), 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 20:47:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2024-11-21 20:47:31,729 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 55 [2024-11-21 20:47:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:31,729 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2024-11-21 20:47:31,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 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 20:47:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2024-11-21 20:47:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-21 20:47:31,730 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:31,730 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:31,746 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 20:47:31,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:31,931 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:31,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 6 times [2024-11-21 20:47:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:31,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762278838] [2024-11-21 20:47:31,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 20:47:31,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:31,953 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-21 20:47:31,953 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762278838] [2024-11-21 20:47:32,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762278838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:32,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689000168] [2024-11-21 20:47:32,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-21 20:47:32,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:32,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:32,202 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 20:47:32,203 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 20:47:32,292 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-21 20:47:32,292 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-21 20:47:32,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-21 20:47:32,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:32,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689000168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:33,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:33,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2024-11-21 20:47:33,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936283502] [2024-11-21 20:47:33,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:33,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-21 20:47:33,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-21 20:47:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2024-11-21 20:47:33,019 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 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 20:47:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-21 20:47:33,241 INFO L93 Difference]: Finished difference Result 298 states and 321 transitions. [2024-11-21 20:47:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-21 20:47:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 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 61 [2024-11-21 20:47:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-21 20:47:33,242 INFO L225 Difference]: With dead ends: 298 [2024-11-21 20:47:33,242 INFO L226 Difference]: Without dead ends: 190 [2024-11-21 20:47:33,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1838, Unknown=0, NotChecked=0, Total=2450 [2024-11-21 20:47:33,243 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 205 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-21 20:47:33,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 237 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-21 20:47:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-21 20:47:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2024-11-21 20:47:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0880503144654088) internal successors, (173), 159 states have internal predecessors, (173), 0 states have call successors, (0), 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 20:47:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2024-11-21 20:47:33,265 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 61 [2024-11-21 20:47:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-21 20:47:33,265 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2024-11-21 20:47:33,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9767441860465116) internal successors, (171), 43 states have internal predecessors, (171), 0 states have call successors, (0), 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 20:47:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2024-11-21 20:47:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-21 20:47:33,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-21 20:47:33,266 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-21 20:47:33,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-21 20:47:33,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:33,467 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-21 20:47:33,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-21 20:47:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1731139381, now seen corresponding path program 7 times [2024-11-21 20:47:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-21 20:47:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971327054] [2024-11-21 20:47:33,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 20:47:33,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-21 20:47:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 10 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-21 20:47:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971327054] [2024-11-21 20:47:33,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971327054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-21 20:47:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163597000] [2024-11-21 20:47:33,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-21 20:47:33,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-21 20:47:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-21 20:47:33,907 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 20:47:33,908 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 20:47:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-21 20:47:33,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-21 20:47:33,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-21 20:47:34,094 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 11 treesize of output 7 [2024-11-21 20:47:34,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-21 20:47:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:34,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2024-11-21 20:47:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:34,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2024-11-21 20:47:34,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-21 20:47:34,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-21 20:47:34,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2024-11-21 20:47:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-21 20:47:43,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-21 20:47:44,049 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 49 [2024-11-21 20:47:44,051 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 99 treesize of output 91 [2024-11-21 20:47:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-21 20:47:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163597000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-21 20:47:44,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-21 20:47:44,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 58 [2024-11-21 20:47:44,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72439317] [2024-11-21 20:47:44,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-21 20:47:44,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-21 20:47:44,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-21 20:47:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-21 20:47:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2969, Unknown=2, NotChecked=0, Total=3306 [2024-11-21 20:47:44,203 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 58 states, 58 states have (on average 3.1206896551724137) internal successors, (181), 58 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 20:47:56,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:48:04,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:48:16,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:48:24,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-21 20:48:28,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]