./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/nr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/nr3.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 4885a4fffd0288753086daaa59bdb12816a7be62636dc49311bbb97ad277d866 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:15:06,801 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:15:06,854 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:15:06,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:15:06,861 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:15:06,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:15:06,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:15:06,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:15:06,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:15:06,882 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:15:06,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:15:06,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:15:06,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:15:06,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:15:06,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:15:06,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:15:06,885 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:15:06,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:15:06,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:15:06,886 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 4885a4fffd0288753086daaa59bdb12816a7be62636dc49311bbb97ad277d866 [2025-03-03 09:15:07,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:15:07,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:15:07,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:15:07,102 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:15:07,103 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:15:07,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr3.c [2025-03-03 09:15:08,201 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc3204a57/4a7a115e4faf4704b5bacf482e69de9e/FLAGe93c76535 [2025-03-03 09:15:08,452 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:15:08,453 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr3.c [2025-03-03 09:15:08,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc3204a57/4a7a115e4faf4704b5bacf482e69de9e/FLAGe93c76535 [2025-03-03 09:15:08,476 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc3204a57/4a7a115e4faf4704b5bacf482e69de9e [2025-03-03 09:15:08,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:15:08,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:15:08,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:15:08,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:15:08,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:15:08,485 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,486 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1298cda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08, skipping insertion in model container [2025-03-03 09:15:08,486 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,497 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:15:08,591 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/nr3.c[394,407] [2025-03-03 09:15:08,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:15:08,614 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:15:08,621 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/nr3.c[394,407] [2025-03-03 09:15:08,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:15:08,640 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:15:08,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08 WrapperNode [2025-03-03 09:15:08,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:15:08,643 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:15:08,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:15:08,643 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:15:08,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,653 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,666 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2025-03-03 09:15:08,667 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:15:08,667 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:15:08,668 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:15:08,668 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:15:08,673 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,675 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,687 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2025-03-03 09:15:08,687 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,688 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,695 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:15:08,698 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:15:08,698 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:15:08,698 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:15:08,703 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (1/1) ... [2025-03-03 09:15:08,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:15:08,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:08,728 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) [2025-03-03 09:15:08,733 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 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:15:08,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-03 09:15:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:15:08,803 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:15:08,804 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:15:08,921 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-03-03 09:15:08,923 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:15:08,930 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:15:08,931 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:15:08,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:15:08 BoogieIcfgContainer [2025-03-03 09:15:08,932 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:15:08,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:15:08,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:15:08,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:15:08,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:15:08" (1/3) ... [2025-03-03 09:15:08,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2d05a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:15:08, skipping insertion in model container [2025-03-03 09:15:08,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:15:08" (2/3) ... [2025-03-03 09:15:08,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2d05a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:15:08, skipping insertion in model container [2025-03-03 09:15:08,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:15:08" (3/3) ... [2025-03-03 09:15:08,939 INFO L128 eAbstractionObserver]: Analyzing ICFG nr3.c [2025-03-03 09:15:08,950 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:15:08,951 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG nr3.c that has 1 procedures, 21 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 09:15:08,990 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:15:08,998 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;@7881b101, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:15:08,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:15:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:15:09,006 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:09,006 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:09,007 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:09,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1768238075, now seen corresponding path program 1 times [2025-03-03 09:15:09,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:09,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227855848] [2025-03-03 09:15:09,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:09,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:09,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:15:09,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:15:09,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:09,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:09,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:09,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227855848] [2025-03-03 09:15:09,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227855848] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:09,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:09,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 09:15:09,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677588344] [2025-03-03 09:15:09,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:09,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 09:15:09,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:09,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 09:15:09,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:15:09,150 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:09,158 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2025-03-03 09:15:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 09:15:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-03 09:15:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:09,163 INFO L225 Difference]: With dead ends: 37 [2025-03-03 09:15:09,163 INFO L226 Difference]: Without dead ends: 17 [2025-03-03 09:15:09,165 INFO L434 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 [2025-03-03 09:15:09,169 INFO L435 NwaCegarLoop]: 27 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, 27 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 [2025-03-03 09:15:09,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-03 09:15:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-03 09:15:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2025-03-03 09:15:09,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2025-03-03 09:15:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:09,190 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2025-03-03 09:15:09,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2025-03-03 09:15:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:15:09,192 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:09,192 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:09,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:15:09,193 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:09,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash -783918886, now seen corresponding path program 1 times [2025-03-03 09:15:09,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:09,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091986411] [2025-03-03 09:15:09,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:09,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:15:09,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:15:09,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:09,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:09,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:09,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091986411] [2025-03-03 09:15:09,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091986411] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:09,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:15:09,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402758286] [2025-03-03 09:15:09,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:09,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:15:09,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:09,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:15:09,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:15:09,500 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:09,541 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2025-03-03 09:15:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:15:09,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-03 09:15:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:09,542 INFO L225 Difference]: With dead ends: 28 [2025-03-03 09:15:09,542 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 09:15:09,542 INFO L434 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 [2025-03-03 09:15:09,542 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:09,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 22 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 09:15:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2025-03-03 09:15:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 09:15:09,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2025-03-03 09:15:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:09,546 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 09:15:09,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 09:15:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-03 09:15:09,547 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:09,547 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:09,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:15:09,547 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:09,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:09,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2003912629, now seen corresponding path program 1 times [2025-03-03 09:15:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:09,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880988434] [2025-03-03 09:15:09,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:09,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:09,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-03 09:15:09,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-03 09:15:09,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:09,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880988434] [2025-03-03 09:15:09,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880988434] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:09,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:15:09,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:15:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114033973] [2025-03-03 09:15:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:09,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:15:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:09,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:15:09,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:15:09,615 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2025-03-03 09:15:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:09,631 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2025-03-03 09:15:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:15:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2025-03-03 09:15:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:09,632 INFO L225 Difference]: With dead ends: 32 [2025-03-03 09:15:09,632 INFO L226 Difference]: Without dead ends: 21 [2025-03-03 09:15:09,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:15:09,633 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:09,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-03 09:15:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-03-03 09:15:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-03-03 09:15:09,636 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2025-03-03 09:15:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:09,636 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-03-03 09:15:09,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2025-03-03 09:15:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-03-03 09:15:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-03 09:15:09,636 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:09,637 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:09,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 09:15:09,637 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:09,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1205006704, now seen corresponding path program 1 times [2025-03-03 09:15:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250291620] [2025-03-03 09:15:09,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:09,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:15:09,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:15:09,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:09,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:09,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250291620] [2025-03-03 09:15:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250291620] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458446345] [2025-03-03 09:15:09,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:09,722 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) [2025-03-03 09:15:09,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:15:09,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-03 09:15:09,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-03 09:15:09,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:09,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:09,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:15:09,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:09,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:15:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458446345] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:15:09,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:15:09,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2025-03-03 09:15:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679485868] [2025-03-03 09:15:09,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:15:09,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:15:09,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:09,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:15:09,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:15:09,832 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:09,868 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2025-03-03 09:15:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:15:09,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-03 09:15:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:09,869 INFO L225 Difference]: With dead ends: 37 [2025-03-03 09:15:09,869 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 09:15:09,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:15:09,869 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:09,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 09:15:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 09:15:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2025-03-03 09:15:09,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2025-03-03 09:15:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:09,875 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2025-03-03 09:15:09,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2025-03-03 09:15:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 09:15:09,879 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:09,879 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:09,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 09:15:10,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:10,080 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:10,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1041900720, now seen corresponding path program 2 times [2025-03-03 09:15:10,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:10,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207198633] [2025-03-03 09:15:10,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:15:10,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:10,089 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-03 09:15:10,109 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 09:15:10,109 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:15:10,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:10,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:10,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207198633] [2025-03-03 09:15:10,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207198633] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:10,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035733065] [2025-03-03 09:15:10,208 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:15:10,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:10,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:10,211 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) [2025-03-03 09:15:10,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:15:10,245 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-03 09:15:10,263 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 09:15:10,264 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:15:10,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:10,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-03 09:15:10,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:10,332 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:15:10,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035733065] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:15:10,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:15:10,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-03-03 09:15:10,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034455894] [2025-03-03 09:15:10,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:15:10,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:15:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:10,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:15:10,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:15:10,333 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:10,367 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2025-03-03 09:15:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:15:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-03 09:15:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:10,367 INFO L225 Difference]: With dead ends: 43 [2025-03-03 09:15:10,367 INFO L226 Difference]: Without dead ends: 25 [2025-03-03 09:15:10,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:15:10,368 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:10,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:15:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-03 09:15:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-03 09:15:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2025-03-03 09:15:10,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2025-03-03 09:15:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:10,372 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2025-03-03 09:15:10,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2025-03-03 09:15:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 09:15:10,372 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:10,372 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:10,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 09:15:10,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:10,573 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:10,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1445612113, now seen corresponding path program 1 times [2025-03-03 09:15:10,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:10,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546943548] [2025-03-03 09:15:10,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:10,582 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 09:15:10,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 09:15:10,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:10,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:11,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546943548] [2025-03-03 09:15:11,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546943548] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529236694] [2025-03-03 09:15:11,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:11,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:11,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:11,168 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) [2025-03-03 09:15:11,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:15:11,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 09:15:11,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 09:15:11,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:11,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:11,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-03 09:15:11,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:11,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:15:11,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-03 09:15:11,547 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2025-03-03 09:15:11,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 40 [2025-03-03 09:15:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:11,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:15:12,031 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 63 treesize of output 59 [2025-03-03 09:15:12,035 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 283 treesize of output 275 [2025-03-03 09:15:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:15:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529236694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:15:12,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:15:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2025-03-03 09:15:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380216896] [2025-03-03 09:15:12,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:15:12,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 09:15:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:12,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 09:15:12,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 09:15:12,196 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:14,186 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2025-03-03 09:15:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-03 09:15:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-03 09:15:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:14,187 INFO L225 Difference]: With dead ends: 138 [2025-03-03 09:15:14,187 INFO L226 Difference]: Without dead ends: 120 [2025-03-03 09:15:14,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1451, Invalid=6031, Unknown=0, NotChecked=0, Total=7482 [2025-03-03 09:15:14,191 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 393 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:14,191 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 123 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:15:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-03-03 09:15:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 45. [2025-03-03 09:15:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2025-03-03 09:15:14,198 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 23 [2025-03-03 09:15:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:14,198 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2025-03-03 09:15:14,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2025-03-03 09:15:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 09:15:14,198 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:14,199 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:14,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 09:15:14,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:14,400 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:14,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash -749349583, now seen corresponding path program 1 times [2025-03-03 09:15:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842533449] [2025-03-03 09:15:14,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:14,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:14,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 09:15:14,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 09:15:14,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:14,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:14,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842533449] [2025-03-03 09:15:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842533449] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585900346] [2025-03-03 09:15:14,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:15:14,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:14,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:14,741 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) [2025-03-03 09:15:14,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:15:14,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 09:15:14,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 09:15:14,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:15:14,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:14,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-03 09:15:14,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:14,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 09:15:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:14,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:15:14,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2025-03-03 09:15:14,954 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 24 treesize of output 20 [2025-03-03 09:15:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585900346] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:15:15,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:15:15,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 25 [2025-03-03 09:15:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159568099] [2025-03-03 09:15:15,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:15:15,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 09:15:15,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:15,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 09:15:15,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:15:15,055 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:15,387 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2025-03-03 09:15:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 09:15:15,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2025-03-03 09:15:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:15,388 INFO L225 Difference]: With dead ends: 109 [2025-03-03 09:15:15,388 INFO L226 Difference]: Without dead ends: 107 [2025-03-03 09:15:15,389 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 09:15:15,389 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:15,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 139 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:15:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-03-03 09:15:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2025-03-03 09:15:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2025-03-03 09:15:15,398 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 33 [2025-03-03 09:15:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:15,398 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2025-03-03 09:15:15,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2025-03-03 09:15:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 09:15:15,399 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:15,399 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:15,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 09:15:15,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:15,600 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:15,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash -137423908, now seen corresponding path program 2 times [2025-03-03 09:15:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:15,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861119022] [2025-03-03 09:15:15,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:15:15,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:15,608 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 09:15:15,621 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 09:15:15,621 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:15:15,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:15:15,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861119022] [2025-03-03 09:15:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861119022] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:15,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108349759] [2025-03-03 09:15:15,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:15:15,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:15,819 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) [2025-03-03 09:15:15,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:15:15,851 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-03 09:15:15,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 09:15:15,867 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:15:15,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:15,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 09:15:15,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:15:16,095 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:15:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:15:16,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108349759] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:15:16,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:15:16,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2025-03-03 09:15:16,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352525332] [2025-03-03 09:15:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:15:16,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 09:15:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:15:16,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 09:15:16,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2025-03-03 09:15:16,220 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:15:16,381 INFO L93 Difference]: Finished difference Result 120 states and 146 transitions. [2025-03-03 09:15:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 09:15:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-03 09:15:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:15:16,382 INFO L225 Difference]: With dead ends: 120 [2025-03-03 09:15:16,382 INFO L226 Difference]: Without dead ends: 95 [2025-03-03 09:15:16,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2025-03-03 09:15:16,383 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:15:16,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 145 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:15:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-03 09:15:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2025-03-03 09:15:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2025-03-03 09:15:16,395 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 38 [2025-03-03 09:15:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:15:16,395 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2025-03-03 09:15:16,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:15:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2025-03-03 09:15:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 09:15:16,396 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:15:16,396 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:15:16,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 09:15:16,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:16,596 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:15:16,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:15:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1091635661, now seen corresponding path program 3 times [2025-03-03 09:15:16,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:15:16,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55345288] [2025-03-03 09:15:16,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:15:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:15:16,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 8 equivalence classes. [2025-03-03 09:15:16,630 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 09:15:16,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-03 09:15:16,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:17,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:15:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55345288] [2025-03-03 09:15:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55345288] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:15:17,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073407749] [2025-03-03 09:15:17,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:15:17,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:15:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:15:17,593 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) [2025-03-03 09:15:17,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:15:17,633 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 8 equivalence classes. [2025-03-03 09:15:17,657 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 09:15:17,658 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-03-03 09:15:17,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:15:17,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-03 09:15:17,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:15:17,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 09:15:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:17,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-03-03 09:15:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:17,927 INFO L349 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2025-03-03 09:15:17,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 48 [2025-03-03 09:15:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:15:26,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2025-03-03 09:15:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:15:26,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:15:26,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 56 [2025-03-03 09:15:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:15:30,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:16:41,419 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 61 treesize of output 59 [2025-03-03 09:16:41,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11246 treesize of output 11182 [2025-03-03 09:16:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:16:42,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073407749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:16:42,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:16:42,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 55 [2025-03-03 09:16:42,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017962505] [2025-03-03 09:16:42,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:16:42,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-03 09:16:42,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:16:42,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-03 09:16:42,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2605, Unknown=21, NotChecked=0, Total=2970 [2025-03-03 09:16:42,268 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 55 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:16:47,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 09:16:51,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]