./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr3.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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 02:32:52,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 02:32:52,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 02:32:52,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 02:32:52,710 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 02:32:52,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 02:32:52,749 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 02:32:52,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 02:32:52,750 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 02:32:52,750 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 02:32:52,751 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 02:32:52,751 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 02:32:52,752 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 02:32:52,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 02:32:52,758 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 02:32:52,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 02:32:52,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 02:32:52,759 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 02:32:52,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 02:32:52,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 02:32:52,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 02:32:52,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 02:32:52,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 02:32:52,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 02:32:52,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 02:32:52,760 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 02:32:52,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 02:32:52,761 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 02:32:52,762 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 02:32:52,762 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 02:32:52,762 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 02:32:52,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 02:32:52,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:32:52,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 02:32:52,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 02:32:52,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 02:32:52,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 02:32:52,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 02:32:52,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 02:32:52,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 02:32:52,767 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 02:32:52,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 02:32:52,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2024-11-16 02:32:53,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 02:32:53,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 02:32:53,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 02:32:53,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 02:32:53,139 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 02:32:53,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2024-11-16 02:32:54,531 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 02:32:54,700 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 02:32:54,700 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2024-11-16 02:32:54,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040cd0b87/70e5170efcf443dbbd416f2ea9ad2552/FLAG75e0980eb [2024-11-16 02:32:54,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/040cd0b87/70e5170efcf443dbbd416f2ea9ad2552 [2024-11-16 02:32:54,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 02:32:54,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 02:32:54,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 02:32:54,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 02:32:54,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 02:32:54,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b6d3a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54, skipping insertion in model container [2024-11-16 02:32:54,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,749 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 02:32:54,886 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/pnr3.c[395,408] [2024-11-16 02:32:54,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:32:54,908 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 02:32:54,916 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/pnr3.c[395,408] [2024-11-16 02:32:54,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 02:32:54,935 INFO L204 MainTranslator]: Completed translation [2024-11-16 02:32:54,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54 WrapperNode [2024-11-16 02:32:54,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 02:32:54,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 02:32:54,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 02:32:54,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 02:32:54,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,946 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,959 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2024-11-16 02:32:54,960 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 02:32:54,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 02:32:54,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 02:32:54,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 02:32:54,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,969 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,977 INFO L175 MemorySlicer]: Split 16 memory accesses to 3 slices as follows [2, 7, 7]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0]. The 6 writes are split as follows [0, 0, 6]. [2024-11-16 02:32:54,978 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,982 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,982 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,983 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 02:32:54,985 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 02:32:54,985 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 02:32:54,986 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 02:32:54,986 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (1/1) ... [2024-11-16 02:32:54,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 02:32:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:32:55,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 02:32:55,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 02:32:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 02:32:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 02:32:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 02:32:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 02:32:55,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 02:32:55,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 02:32:55,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 02:32:55,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 02:32:55,056 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2024-11-16 02:32:55,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2024-11-16 02:32:55,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 02:32:55,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 02:32:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 02:32:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 02:32:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 02:32:55,124 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 02:32:55,126 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 02:32:55,267 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-16 02:32:55,267 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 02:32:55,280 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 02:32:55,280 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 02:32:55,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:32:55 BoogieIcfgContainer [2024-11-16 02:32:55,280 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 02:32:55,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 02:32:55,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 02:32:55,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 02:32:55,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 02:32:54" (1/3) ... [2024-11-16 02:32:55,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d48fdd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:32:55, skipping insertion in model container [2024-11-16 02:32:55,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 02:32:54" (2/3) ... [2024-11-16 02:32:55,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d48fdd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 02:32:55, skipping insertion in model container [2024-11-16 02:32:55,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 02:32:55" (3/3) ... [2024-11-16 02:32:55,293 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr3.c [2024-11-16 02:32:55,306 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 02:32:55,307 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 02:32:55,364 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 02:32:55,369 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;@46730d5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 02:32:55,369 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 02:32:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 30 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:32:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-16 02:32:55,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:32:55,380 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:32:55,380 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:32:55,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:32:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1000957218, now seen corresponding path program 1 times [2024-11-16 02:32:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:32:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778264521] [2024-11-16 02:32:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:55,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:32:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:32:55,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:32:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778264521] [2024-11-16 02:32:55,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778264521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:32:55,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:32:55,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 02:32:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201612474] [2024-11-16 02:32:55,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:32:55,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 02:32:55,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:32:55,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 02:32:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:32:55,606 INFO L87 Difference]: Start difference. First operand has 35 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 30 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 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) [2024-11-16 02:32:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:32:55,626 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2024-11-16 02:32:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 02:32:55,629 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 [2024-11-16 02:32:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:32:55,636 INFO L225 Difference]: With dead ends: 64 [2024-11-16 02:32:55,636 INFO L226 Difference]: Without dead ends: 29 [2024-11-16 02:32:55,639 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 02:32:55,643 INFO L432 NwaCegarLoop]: 42 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, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 02:32:55,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 02:32:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-16 02:32:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-16 02:32:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:32:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-16 02:32:55,698 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2024-11-16 02:32:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:32:55,711 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-16 02:32:55,712 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) [2024-11-16 02:32:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-16 02:32:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-16 02:32:55,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:32:55,714 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:32:55,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 02:32:55,715 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:32:55,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:32:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash 989222195, now seen corresponding path program 1 times [2024-11-16 02:32:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:32:55,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976521656] [2024-11-16 02:32:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:32:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 02:32:56,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:32:56,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976521656] [2024-11-16 02:32:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976521656] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 02:32:56,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 02:32:56,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 02:32:56,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166655003] [2024-11-16 02:32:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 02:32:56,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 02:32:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:32:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 02:32:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-16 02:32:56,026 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:32:56,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:32:56,104 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-11-16 02:32:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 02:32:56,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-16 02:32:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:32:56,105 INFO L225 Difference]: With dead ends: 49 [2024-11-16 02:32:56,105 INFO L226 Difference]: Without dead ends: 41 [2024-11-16 02:32:56,105 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 [2024-11-16 02:32:56,106 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:32:56,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:32:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-16 02:32:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2024-11-16 02:32:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:32:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-11-16 02:32:56,122 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2024-11-16 02:32:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:32:56,123 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-11-16 02:32:56,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 02:32:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-11-16 02:32:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 02:32:56,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:32:56,124 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:32:56,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 02:32:56,124 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:32:56,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:32:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash 577811060, now seen corresponding path program 1 times [2024-11-16 02:32:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:32:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807184129] [2024-11-16 02:32:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:32:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:56,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:32:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:56,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:32:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:56,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:32:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:56,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:32:56,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807184129] [2024-11-16 02:32:56,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807184129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:32:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474565433] [2024-11-16 02:32:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:56,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:32:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:32:56,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:32:56,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 02:32:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:56,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 02:32:56,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:32:56,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:32:56,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-16 02:32:56,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-16 02:32:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:57,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:32:57,106 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 [2024-11-16 02:32:57,109 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 [2024-11-16 02:32:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:57,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474565433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:32:57,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:32:57,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-11-16 02:32:57,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259276605] [2024-11-16 02:32:57,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:32:57,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 02:32:57,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:32:57,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 02:32:57,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-16 02:32:57,128 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-16 02:32:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:32:57,328 INFO L93 Difference]: Finished difference Result 90 states and 117 transitions. [2024-11-16 02:32:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 02:32:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 35 [2024-11-16 02:32:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:32:57,330 INFO L225 Difference]: With dead ends: 90 [2024-11-16 02:32:57,330 INFO L226 Difference]: Without dead ends: 87 [2024-11-16 02:32:57,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:32:57,331 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 118 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 02:32:57,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 197 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 02:32:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-16 02:32:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 47. [2024-11-16 02:32:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:32:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2024-11-16 02:32:57,340 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 35 [2024-11-16 02:32:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:32:57,341 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2024-11-16 02:32:57,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-16 02:32:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2024-11-16 02:32:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-16 02:32:57,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:32:57,342 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:32:57,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 02:32:57,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:32:57,545 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:32:57,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:32:57,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1460245229, now seen corresponding path program 1 times [2024-11-16 02:32:57,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:32:57,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579464090] [2024-11-16 02:32:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:57,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:32:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:57,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:32:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:57,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:32:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:57,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:32:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:32:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579464090] [2024-11-16 02:32:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579464090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:32:57,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517293052] [2024-11-16 02:32:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:32:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:32:57,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:32:57,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 02:32:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:57,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-16 02:32:57,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:32:58,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:32:58,079 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 [2024-11-16 02:32:58,137 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 [2024-11-16 02:32:58,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:32:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 02:32:58,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:32:58,330 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 [2024-11-16 02:32:58,332 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 16 [2024-11-16 02:32:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:58,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517293052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:32:58,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:32:58,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2024-11-16 02:32:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297776845] [2024-11-16 02:32:58,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:32:58,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 02:32:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:32:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 02:32:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:32:58,437 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-16 02:32:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:32:58,911 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2024-11-16 02:32:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 02:32:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2024-11-16 02:32:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:32:58,913 INFO L225 Difference]: With dead ends: 120 [2024-11-16 02:32:58,913 INFO L226 Difference]: Without dead ends: 117 [2024-11-16 02:32:58,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 02:32:58,914 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 344 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:32:58,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 238 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:32:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-16 02:32:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 34. [2024-11-16 02:32:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:32:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-11-16 02:32:58,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 35 [2024-11-16 02:32:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:32:58,922 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-11-16 02:32:58,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-16 02:32:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-11-16 02:32:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 02:32:58,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:32:58,923 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:32:58,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 02:32:59,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 02:32:59,128 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:32:59,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:32:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1807048123, now seen corresponding path program 1 times [2024-11-16 02:32:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:32:59,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766074014] [2024-11-16 02:32:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:59,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:32:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:59,422 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:32:59,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:59,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:32:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:59,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:32:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:32:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766074014] [2024-11-16 02:32:59,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766074014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:32:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587522250] [2024-11-16 02:32:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:32:59,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:32:59,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:32:59,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:32:59,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 02:32:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:32:59,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-16 02:32:59,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:32:59,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:32:59,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-16 02:32:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:59,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:32:59,698 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 [2024-11-16 02:32:59,700 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 [2024-11-16 02:32:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:32:59,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587522250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:32:59,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:32:59,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2024-11-16 02:32:59,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317804932] [2024-11-16 02:32:59,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:32:59,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 02:32:59,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:32:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 02:32:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-16 02:32:59,724 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-16 02:32:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:32:59,993 INFO L93 Difference]: Finished difference Result 105 states and 140 transitions. [2024-11-16 02:32:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 02:32:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 39 [2024-11-16 02:32:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:32:59,994 INFO L225 Difference]: With dead ends: 105 [2024-11-16 02:32:59,994 INFO L226 Difference]: Without dead ends: 102 [2024-11-16 02:32:59,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:32:59,995 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 83 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:32:59,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 265 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:32:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-16 02:33:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2024-11-16 02:33:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:33:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-11-16 02:33:00,012 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 39 [2024-11-16 02:33:00,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:33:00,013 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-11-16 02:33:00,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-16 02:33:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-11-16 02:33:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 02:33:00,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:33:00,015 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:33:00,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 02:33:00,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:00,216 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:33:00,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:33:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1398223898, now seen corresponding path program 1 times [2024-11-16 02:33:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:33:00,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887765471] [2024-11-16 02:33:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:33:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:00,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:33:00,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:00,424 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:33:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:00,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:33:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:00,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:33:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887765471] [2024-11-16 02:33:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887765471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:33:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088735788] [2024-11-16 02:33:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:33:00,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:33:00,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 02:33:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:00,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-16 02:33:00,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:33:00,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:33:00,648 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 [2024-11-16 02:33:00,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:33:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 02:33:00,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:33:00,807 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 [2024-11-16 02:33:00,809 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 20 treesize of output 16 [2024-11-16 02:33:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088735788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:33:00,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:33:00,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2024-11-16 02:33:00,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124805477] [2024-11-16 02:33:00,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:33:00,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 02:33:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:33:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 02:33:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-16 02:33:00,859 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-16 02:33:05,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:09,333 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] [2024-11-16 02:33:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:33:09,414 INFO L93 Difference]: Finished difference Result 133 states and 175 transitions. [2024-11-16 02:33:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 02:33:09,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 39 [2024-11-16 02:33:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:33:09,415 INFO L225 Difference]: With dead ends: 133 [2024-11-16 02:33:09,415 INFO L226 Difference]: Without dead ends: 130 [2024-11-16 02:33:09,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2024-11-16 02:33:09,416 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 242 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 85 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-16 02:33:09,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 356 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 417 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2024-11-16 02:33:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-16 02:33:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 38. [2024-11-16 02:33:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:33:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-16 02:33:09,435 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 39 [2024-11-16 02:33:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:33:09,436 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-16 02:33:09,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-16 02:33:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-16 02:33:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-16 02:33:09,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:33:09,441 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:33:09,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 02:33:09,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:09,642 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:33:09,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:33:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash -527102590, now seen corresponding path program 2 times [2024-11-16 02:33:09,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:33:09,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295282931] [2024-11-16 02:33:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:09,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:33:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:09,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:33:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:09,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:33:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:09,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:33:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:09,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:33:09,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295282931] [2024-11-16 02:33:09,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295282931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:33:09,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437396556] [2024-11-16 02:33:09,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 02:33:09,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:33:09,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:33:09,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 02:33:09,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 02:33:09,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:33:09,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-16 02:33:09,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:33:09,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:33:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:10,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:33:10,108 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 18 treesize of output 16 [2024-11-16 02:33:10,110 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 22 treesize of output 18 [2024-11-16 02:33:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437396556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:33:10,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:33:10,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2024-11-16 02:33:10,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998066817] [2024-11-16 02:33:10,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:33:10,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 02:33:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:33:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 02:33:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-16 02:33:10,159 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 02:33:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:33:10,639 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-11-16 02:33:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 02:33:10,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2024-11-16 02:33:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:33:10,640 INFO L225 Difference]: With dead ends: 153 [2024-11-16 02:33:10,640 INFO L226 Difference]: Without dead ends: 150 [2024-11-16 02:33:10,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2024-11-16 02:33:10,641 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 116 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:33:10,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 359 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 02:33:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-16 02:33:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 76. [2024-11-16 02:33:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-16 02:33:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2024-11-16 02:33:10,661 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 43 [2024-11-16 02:33:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:33:10,661 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2024-11-16 02:33:10,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 02:33:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2024-11-16 02:33:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-16 02:33:10,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:33:10,662 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:33:10,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 02:33:10,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:10,865 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:33:10,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:33:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1524174943, now seen corresponding path program 1 times [2024-11-16 02:33:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:33:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795976114] [2024-11-16 02:33:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:33:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:11,053 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:33:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:11,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:33:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:11,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:33:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:11,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:33:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795976114] [2024-11-16 02:33:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795976114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:33:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331926437] [2024-11-16 02:33:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:11,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:11,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:33:11,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:33:11,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 02:33:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:11,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 02:33:11,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:33:11,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:33:11,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:33:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:11,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:33:11,480 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 [2024-11-16 02:33:11,482 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 20 treesize of output 16 [2024-11-16 02:33:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:11,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331926437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:33:11,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:33:11,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-11-16 02:33:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172719329] [2024-11-16 02:33:11,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:33:11,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 02:33:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:33:11,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 02:33:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:33:11,551 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-16 02:33:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:33:12,642 INFO L93 Difference]: Finished difference Result 234 states and 328 transitions. [2024-11-16 02:33:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-16 02:33:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2024-11-16 02:33:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:33:12,644 INFO L225 Difference]: With dead ends: 234 [2024-11-16 02:33:12,647 INFO L226 Difference]: Without dead ends: 231 [2024-11-16 02:33:12,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=2251, Unknown=0, NotChecked=0, Total=2862 [2024-11-16 02:33:12,649 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 256 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 02:33:12,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 525 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 02:33:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-16 02:33:12,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 42. [2024-11-16 02:33:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-16 02:33:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-16 02:33:12,677 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 43 [2024-11-16 02:33:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:33:12,677 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-16 02:33:12,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-16 02:33:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-16 02:33:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 02:33:12,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:33:12,678 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:33:12,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 02:33:12,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:12,879 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:33:12,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:33:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2063172041, now seen corresponding path program 3 times [2024-11-16 02:33:12,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:33:12,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219322478] [2024-11-16 02:33:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:12,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:33:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:13,070 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:33:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:13,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:33:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:13,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:33:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:33:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219322478] [2024-11-16 02:33:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219322478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:33:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781574899] [2024-11-16 02:33:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 02:33:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:33:13,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:33:13,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 02:33:13,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 02:33:13,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:33:13,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-16 02:33:13,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:33:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:13,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:33:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 02:33:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781574899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:33:13,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:33:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2024-11-16 02:33:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161197357] [2024-11-16 02:33:13,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:33:13,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 02:33:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:33:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 02:33:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2024-11-16 02:33:13,624 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-16 02:33:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:33:13,860 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2024-11-16 02:33:13,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 02:33:13,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 47 [2024-11-16 02:33:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:33:13,861 INFO L225 Difference]: With dead ends: 86 [2024-11-16 02:33:13,861 INFO L226 Difference]: Without dead ends: 64 [2024-11-16 02:33:13,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2024-11-16 02:33:13,861 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:33:13,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 130 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 02:33:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-16 02:33:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2024-11-16 02:33:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-16 02:33:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-11-16 02:33:13,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 47 [2024-11-16 02:33:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:33:13,870 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-11-16 02:33:13,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-16 02:33:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-11-16 02:33:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-16 02:33:13,870 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:33:13,870 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:33:13,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 02:33:14,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:14,071 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:33:14,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:33:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -99643224, now seen corresponding path program 4 times [2024-11-16 02:33:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:33:14,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522702108] [2024-11-16 02:33:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:33:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:33:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:33:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:33:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 02:33:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,387 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 02:33:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-11-16 02:33:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:33:14,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:33:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522702108] [2024-11-16 02:33:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522702108] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:33:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987511868] [2024-11-16 02:33:14,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 02:33:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:33:14,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:33:14,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 02:33:14,459 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 02:33:14,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:33:14,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-16 02:33:14,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:33:14,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:33:14,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-16 02:33:14,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-16 02:33:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:33:14,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:33:15,143 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 [2024-11-16 02:33:15,145 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 [2024-11-16 02:33:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:33:15,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987511868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:33:15,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:33:15,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 30 [2024-11-16 02:33:15,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252584013] [2024-11-16 02:33:15,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:33:15,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-16 02:33:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:33:15,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-16 02:33:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-11-16 02:33:15,255 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 30 states, 30 states have (on average 4.233333333333333) internal successors, (127), 30 states have internal predecessors, (127), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-16 02:33:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:33:17,237 INFO L93 Difference]: Finished difference Result 386 states and 567 transitions. [2024-11-16 02:33:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-16 02:33:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.233333333333333) internal successors, (127), 30 states have internal predecessors, (127), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 68 [2024-11-16 02:33:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:33:17,241 INFO L225 Difference]: With dead ends: 386 [2024-11-16 02:33:17,242 INFO L226 Difference]: Without dead ends: 383 [2024-11-16 02:33:17,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1045, Invalid=5117, Unknown=0, NotChecked=0, Total=6162 [2024-11-16 02:33:17,244 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 406 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 02:33:17,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 666 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 02:33:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-16 02:33:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 86. [2024-11-16 02:33:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-16 02:33:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2024-11-16 02:33:17,270 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 68 [2024-11-16 02:33:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:33:17,270 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2024-11-16 02:33:17,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.233333333333333) internal successors, (127), 30 states have internal predecessors, (127), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-16 02:33:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2024-11-16 02:33:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-16 02:33:17,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:33:17,272 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:33:17,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-16 02:33:17,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 02:33:17,473 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:33:17,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:33:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash 925848775, now seen corresponding path program 1 times [2024-11-16 02:33:17,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:33:17,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506777629] [2024-11-16 02:33:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:33:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,823 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:33:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,827 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:33:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:33:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 02:33:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,837 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 02:33:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-11-16 02:33:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:33:17,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:33:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506777629] [2024-11-16 02:33:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506777629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:33:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422851476] [2024-11-16 02:33:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:33:17,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:33:17,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:33:17,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:33:17,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 02:33:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:33:17,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-16 02:33:17,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:33:18,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:33:18,146 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 [2024-11-16 02:33:18,197 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 [2024-11-16 02:33:18,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:33:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-16 02:33:18,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:33:18,496 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 [2024-11-16 02:33:18,498 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 20 treesize of output 16 [2024-11-16 02:33:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:33:18,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422851476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:33:18,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:33:18,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 33 [2024-11-16 02:33:18,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591824241] [2024-11-16 02:33:18,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:33:18,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 02:33:18,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:33:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 02:33:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 02:33:18,649 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-16 02:33:24,156 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] [2024-11-16 02:33:28,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:32,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:36,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:40,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:44,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:48,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:52,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:33:56,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:00,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:05,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:09,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:13,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:17,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:21,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 02:34:25,310 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] [2024-11-16 02:34:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:34:25,326 INFO L93 Difference]: Finished difference Result 486 states and 710 transitions. [2024-11-16 02:34:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-16 02:34:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 68 [2024-11-16 02:34:25,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:34:25,328 INFO L225 Difference]: With dead ends: 486 [2024-11-16 02:34:25,328 INFO L226 Difference]: Without dead ends: 483 [2024-11-16 02:34:25,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1474, Invalid=6898, Unknown=0, NotChecked=0, Total=8372 [2024-11-16 02:34:25,330 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 786 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 452 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.3s IncrementalHoareTripleChecker+Time [2024-11-16 02:34:25,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 882 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 1734 Invalid, 16 Unknown, 0 Unchecked, 65.3s Time] [2024-11-16 02:34:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-11-16 02:34:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 88. [2024-11-16 02:34:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-16 02:34:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2024-11-16 02:34:25,353 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 68 [2024-11-16 02:34:25,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:34:25,354 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2024-11-16 02:34:25,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-16 02:34:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2024-11-16 02:34:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-16 02:34:25,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:34:25,355 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:34:25,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 02:34:25,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:34:25,558 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:34:25,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:34:25,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2140275183, now seen corresponding path program 5 times [2024-11-16 02:34:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:34:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438438209] [2024-11-16 02:34:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:34:25,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:34:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:34:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:34:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,787 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:34:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 02:34:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 02:34:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,791 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-11-16 02:34:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:34:25,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:34:25,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438438209] [2024-11-16 02:34:25,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438438209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:34:25,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201393618] [2024-11-16 02:34:25,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 02:34:25,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:34:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:34:25,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:34:25,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 02:34:25,886 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-16 02:34:25,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 02:34:25,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-16 02:34:25,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:34:25,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:34:26,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-16 02:34:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:34:26,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:34:26,238 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 [2024-11-16 02:34:26,240 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 [2024-11-16 02:34:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:34:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201393618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:34:26,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:34:26,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 23 [2024-11-16 02:34:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131526233] [2024-11-16 02:34:26,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:34:26,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 02:34:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:34:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 02:34:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-11-16 02:34:26,276 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 7 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-16 02:34:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 02:34:28,420 INFO L93 Difference]: Finished difference Result 692 states and 1042 transitions. [2024-11-16 02:34:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-16 02:34:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 7 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 72 [2024-11-16 02:34:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 02:34:28,423 INFO L225 Difference]: With dead ends: 692 [2024-11-16 02:34:28,423 INFO L226 Difference]: Without dead ends: 689 [2024-11-16 02:34:28,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=837, Invalid=4565, Unknown=0, NotChecked=0, Total=5402 [2024-11-16 02:34:28,425 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 233 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-16 02:34:28,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1086 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-16 02:34:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2024-11-16 02:34:28,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 168. [2024-11-16 02:34:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.3157894736842106) internal successors, (175), 133 states have internal predecessors, (175), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-16 02:34:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 239 transitions. [2024-11-16 02:34:28,483 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 239 transitions. Word has length 72 [2024-11-16 02:34:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 02:34:28,483 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 239 transitions. [2024-11-16 02:34:28,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 7 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-16 02:34:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 239 transitions. [2024-11-16 02:34:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-16 02:34:28,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 02:34:28,484 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 02:34:28,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 02:34:28,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 02:34:28,684 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 02:34:28,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 02:34:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 130171342, now seen corresponding path program 1 times [2024-11-16 02:34:28,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 02:34:28,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115685852] [2024-11-16 02:34:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:34:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 02:34:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 02:34:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 02:34:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-16 02:34:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-16 02:34:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-16 02:34:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-11-16 02:34:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:34:28,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 02:34:28,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115685852] [2024-11-16 02:34:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115685852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 02:34:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74710394] [2024-11-16 02:34:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 02:34:28,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 02:34:28,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 02:34:28,976 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 02:34:28,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 02:34:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 02:34:29,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 02:34:29,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 02:34:29,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 02:34:29,311 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 [2024-11-16 02:34:29,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 02:34:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 02:34:29,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 02:34:29,698 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 [2024-11-16 02:34:29,700 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 20 treesize of output 16 [2024-11-16 02:34:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-16 02:34:29,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74710394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 02:34:29,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 02:34:29,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2024-11-16 02:34:29,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689964159] [2024-11-16 02:34:29,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 02:34:29,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-16 02:34:29,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 02:34:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-16 02:34:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2024-11-16 02:34:29,821 INFO L87 Difference]: Start difference. First operand 168 states and 239 transitions. Second operand has 33 states, 33 states have (on average 4.212121212121212) internal successors, (139), 33 states have internal predecessors, (139), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2024-11-16 02:34:36,073 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]