./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/tcpy.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:36:59,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:36:59,713 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:36:59,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:36:59,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:36:59,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:36:59,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:36:59,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:36:59,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:36:59,734 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:36:59,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:36:59,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:36:59,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:36:59,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:36:59,735 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:36:59,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:36:59,736 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:36:59,736 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:36:59,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:36:59,737 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:36:59,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:36:59,738 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:36:59,738 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:36:59,738 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:36:59,738 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:36:59,738 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 -> a747677fdea16741fbb3fca3d9510254677728ef5906b9bf8e219064accd3a39 [2025-03-16 13:36:59,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:36:59,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:36:59,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:36:59,966 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:36:59,967 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:36:59,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2025-03-16 13:37:01,150 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784415605/8478f56d0089455c985859c7217a5093/FLAG85b306c59 [2025-03-16 13:37:01,346 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:37:01,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2025-03-16 13:37:01,353 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784415605/8478f56d0089455c985859c7217a5093/FLAG85b306c59 [2025-03-16 13:37:01,722 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784415605/8478f56d0089455c985859c7217a5093 [2025-03-16 13:37:01,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:37:01,725 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:37:01,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:37:01,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:37:01,729 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:37:01,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11640bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01, skipping insertion in model container [2025-03-16 13:37:01,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:37:01,836 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2025-03-16 13:37:01,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:37:01,862 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:37:01,871 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2025-03-16 13:37:01,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:37:01,888 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:37:01,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01 WrapperNode [2025-03-16 13:37:01,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:37:01,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:37:01,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:37:01,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:37:01,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,916 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2025-03-16 13:37:01,918 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:37:01,918 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:37:01,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:37:01,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:37:01,924 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,928 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,939 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 4, 3]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 3 writes are split as follows [0, 0, 1, 2]. [2025-03-16 13:37:01,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,944 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:37:01,952 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:37:01,953 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:37:01,953 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:37:01,953 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (1/1) ... [2025-03-16 13:37:01,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:37:01,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:01,980 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) [2025-03-16 13:37:01,985 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 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:37:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-16 13:37:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:37:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:37:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:37:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:37:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:37:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:37:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-16 13:37:02,064 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:37:02,066 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:37:02,202 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:37:02,202 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:37:02,208 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:37:02,209 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:37:02,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:37:02 BoogieIcfgContainer [2025-03-16 13:37:02,209 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:37:02,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:37:02,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:37:02,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:37:02,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:37:01" (1/3) ... [2025-03-16 13:37:02,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f691a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:37:02, skipping insertion in model container [2025-03-16 13:37:02,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:37:01" (2/3) ... [2025-03-16 13:37:02,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f691a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:37:02, skipping insertion in model container [2025-03-16 13:37:02,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:37:02" (3/3) ... [2025-03-16 13:37:02,219 INFO L128 eAbstractionObserver]: Analyzing ICFG tcpy.c [2025-03-16 13:37:02,229 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:37:02,230 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG tcpy.c that has 1 procedures, 16 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:37:02,270 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:37:02,280 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;@27a67162, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:37:02,280 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:37:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 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) [2025-03-16 13:37:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-16 13:37:02,287 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:02,288 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:02,288 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:02,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1022053286, now seen corresponding path program 1 times [2025-03-16 13:37:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:02,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341988610] [2025-03-16 13:37:02,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:02,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-16 13:37:02,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-16 13:37:02,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:02,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341988610] [2025-03-16 13:37:02,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341988610] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:37:02,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:37:02,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:37:02,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398085097] [2025-03-16 13:37:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:37:02,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:37:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:02,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:37:02,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:37:02,518 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:02,558 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2025-03-16 13:37:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:37:02,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2025-03-16 13:37:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:02,563 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:37:02,564 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 13:37:02,565 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 [2025-03-16 13:37:02,568 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:02,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:37:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 13:37:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 13:37:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2025-03-16 13:37:02,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2025-03-16 13:37:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:02,588 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2025-03-16 13:37:02,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2025-03-16 13:37:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:37:02,588 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:02,588 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:02,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:37:02,588 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:02,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash 468418927, now seen corresponding path program 1 times [2025-03-16 13:37:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:02,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95384163] [2025-03-16 13:37:02,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:02,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:37:02,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:37:02,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:02,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:02,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95384163] [2025-03-16 13:37:02,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95384163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:02,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977844188] [2025-03-16 13:37:02,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:02,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:02,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:02,724 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) [2025-03-16 13:37:02,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:37:02,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:37:02,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:37:02,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:02,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:02,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:37:02,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:02,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:02,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977844188] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:02,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:02,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-16 13:37:02,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530708794] [2025-03-16 13:37:02,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:02,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 13:37:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:02,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 13:37:02,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:37:02,877 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:02,904 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-03-16 13:37:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:37:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 13:37:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:02,905 INFO L225 Difference]: With dead ends: 23 [2025-03-16 13:37:02,905 INFO L226 Difference]: Without dead ends: 14 [2025-03-16 13:37:02,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2025-03-16 13:37:02,906 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:02,906 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:37:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2025-03-16 13:37:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2025-03-16 13:37:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2025-03-16 13:37:02,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2025-03-16 13:37:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:02,910 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2025-03-16 13:37:02,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:02,911 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2025-03-16 13:37:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 13:37:02,911 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:02,911 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:02,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:03,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:03,115 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:03,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1459086407, now seen corresponding path program 2 times [2025-03-16 13:37:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:03,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893981899] [2025-03-16 13:37:03,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:03,124 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-03-16 13:37:03,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 10 of 12 statements. [2025-03-16 13:37:03,137 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 13:37:03,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:03,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:03,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893981899] [2025-03-16 13:37:03,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893981899] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:37:03,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:37:03,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:37:03,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004190456] [2025-03-16 13:37:03,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:37:03,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:37:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:03,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:37:03,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:37:03,315 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:03,341 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2025-03-16 13:37:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:37:03,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2025-03-16 13:37:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:03,342 INFO L225 Difference]: With dead ends: 25 [2025-03-16 13:37:03,342 INFO L226 Difference]: Without dead ends: 20 [2025-03-16 13:37:03,343 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 [2025-03-16 13:37:03,343 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:03,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:37:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-16 13:37:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2025-03-16 13:37:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2025-03-16 13:37:03,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2025-03-16 13:37:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:03,349 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2025-03-16 13:37:03,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2025-03-16 13:37:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-16 13:37:03,350 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:03,350 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:03,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 13:37:03,350 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:03,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2013916910, now seen corresponding path program 1 times [2025-03-16 13:37:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:03,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378608781] [2025-03-16 13:37:03,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:03,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 13:37:03,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 13:37:03,378 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:03,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:03,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378608781] [2025-03-16 13:37:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378608781] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455530437] [2025-03-16 13:37:03,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:03,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:03,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:03,700 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) [2025-03-16 13:37:03,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:37:03,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-16 13:37:03,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-16 13:37:03,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:03,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:03,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 13:37:03,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:03,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:37:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:04,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:04,157 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-03-16 13:37:04,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 46 [2025-03-16 13:37:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:04,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455530437] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:04,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:04,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 6] total 17 [2025-03-16 13:37:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184701893] [2025-03-16 13:37:04,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:04,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:37:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:04,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:37:04,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:37:04,176 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2025-03-16 13:37:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:04,315 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2025-03-16 13:37:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:37:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) Word has length 13 [2025-03-16 13:37:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:04,316 INFO L225 Difference]: With dead ends: 20 [2025-03-16 13:37:04,316 INFO L226 Difference]: Without dead ends: 18 [2025-03-16 13:37:04,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2025-03-16 13:37:04,317 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:04,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:37:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-03-16 13:37:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2025-03-16 13:37:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2025-03-16 13:37:04,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2025-03-16 13:37:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:04,320 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2025-03-16 13:37:04,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2025-03-16 13:37:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2025-03-16 13:37:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-16 13:37:04,321 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:04,321 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:04,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:04,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 13:37:04,521 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:04,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 201380797, now seen corresponding path program 1 times [2025-03-16 13:37:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291754680] [2025-03-16 13:37:04,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:04,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:37:04,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:37:04,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:04,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:04,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:04,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291754680] [2025-03-16 13:37:04,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291754680] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:04,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511235468] [2025-03-16 13:37:04,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:37:04,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:04,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:04,985 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) [2025-03-16 13:37:04,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:37:05,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-16 13:37:05,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-16 13:37:05,040 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:05,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:05,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 13:37:05,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:05,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:37:05,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2025-03-16 13:37:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:05,271 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:05,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2025-03-16 13:37:05,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2025-03-16 13:37:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:05,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511235468] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:05,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:05,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 31 [2025-03-16 13:37:05,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831234712] [2025-03-16 13:37:05,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:05,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 13:37:05,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:05,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 13:37:05,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2025-03-16 13:37:05,537 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:05,961 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2025-03-16 13:37:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 13:37:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-16 13:37:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:05,962 INFO L225 Difference]: With dead ends: 60 [2025-03-16 13:37:05,963 INFO L226 Difference]: Without dead ends: 52 [2025-03-16 13:37:05,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=1495, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 13:37:05,964 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 151 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:05,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 79 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:37:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-16 13:37:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2025-03-16 13:37:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-03-16 13:37:05,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 16 [2025-03-16 13:37:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:05,976 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-03-16 13:37:05,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-03-16 13:37:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:37:05,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:05,977 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:05,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:37:06,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:06,181 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:06,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:06,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1421258115, now seen corresponding path program 2 times [2025-03-16 13:37:06,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:06,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078722245] [2025-03-16 13:37:06,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:06,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:06,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-16 13:37:06,198 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:37:06,198 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:06,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:37:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:06,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078722245] [2025-03-16 13:37:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078722245] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:06,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7605912] [2025-03-16 13:37:06,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:06,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:06,393 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) [2025-03-16 13:37:06,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:37:06,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-16 13:37:06,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:37:06,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:06,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:06,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 13:37:06,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:37:06,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 13:37:06,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7605912] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:06,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:06,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2025-03-16 13:37:06,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988823223] [2025-03-16 13:37:06,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:06,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:37:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:06,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:37:06,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:37:06,812 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:07,008 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2025-03-16 13:37:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-16 13:37:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2025-03-16 13:37:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:07,009 INFO L225 Difference]: With dead ends: 71 [2025-03-16 13:37:07,009 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 13:37:07,010 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2025-03-16 13:37:07,010 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:07,010 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 102 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:37:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 13:37:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2025-03-16 13:37:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2025-03-16 13:37:07,019 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2025-03-16 13:37:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:07,019 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2025-03-16 13:37:07,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2025-03-16 13:37:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:37:07,019 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:07,019 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:07,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:07,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:07,220 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:07,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1553161650, now seen corresponding path program 3 times [2025-03-16 13:37:07,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:07,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797824725] [2025-03-16 13:37:07,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:37:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:07,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-03-16 13:37:07,240 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 19 statements. [2025-03-16 13:37:07,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:37:07,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:37:07,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797824725] [2025-03-16 13:37:07,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797824725] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:07,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079427926] [2025-03-16 13:37:07,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:37:07,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:07,471 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) [2025-03-16 13:37:07,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:37:07,513 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 3 equivalence classes. [2025-03-16 13:37:07,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 19 statements. [2025-03-16 13:37:07,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-16 13:37:07,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:07,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 13:37:07,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:07,588 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2025-03-16 13:37:07,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:37:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:37:09,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:09,362 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-03-16 13:37:09,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2025-03-16 13:37:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:37:09,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079427926] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:09,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2025-03-16 13:37:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017218934] [2025-03-16 13:37:09,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:09,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 13:37:09,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:09,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 13:37:09,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2025-03-16 13:37:09,398 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:09,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:09,532 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2025-03-16 13:37:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:37:09,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 13:37:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:09,533 INFO L225 Difference]: With dead ends: 53 [2025-03-16 13:37:09,533 INFO L226 Difference]: Without dead ends: 51 [2025-03-16 13:37:09,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=79, Invalid=260, Unknown=3, NotChecked=0, Total=342 [2025-03-16 13:37:09,534 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:09,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 96 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:37:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-16 13:37:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2025-03-16 13:37:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2025-03-16 13:37:09,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2025-03-16 13:37:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:09,541 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2025-03-16 13:37:09,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2025-03-16 13:37:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 13:37:09,542 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:09,542 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:09,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:09,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:09,746 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:09,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash -733116274, now seen corresponding path program 4 times [2025-03-16 13:37:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068415445] [2025-03-16 13:37:09,746 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:37:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:09,753 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:37:09,756 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 15 of 19 statements. [2025-03-16 13:37:09,756 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:37:09,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:09,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068415445] [2025-03-16 13:37:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068415445] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684050569] [2025-03-16 13:37:09,864 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:37:09,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:09,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:09,866 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) [2025-03-16 13:37:09,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:37:09,906 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-16 13:37:09,913 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 15 of 19 statements. [2025-03-16 13:37:09,913 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:37:09,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:09,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:37:09,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:10,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-16 13:37:10,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684050569] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:10,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:10,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-16 13:37:10,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631533430] [2025-03-16 13:37:10,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:10,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:37:10,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:10,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:37:10,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:37:10,137 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:10,219 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2025-03-16 13:37:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 13:37:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 13:37:10,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:10,219 INFO L225 Difference]: With dead ends: 40 [2025-03-16 13:37:10,219 INFO L226 Difference]: Without dead ends: 23 [2025-03-16 13:37:10,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:37:10,220 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:10,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:37:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-16 13:37:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2025-03-16 13:37:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2025-03-16 13:37:10,226 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2025-03-16 13:37:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:10,226 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2025-03-16 13:37:10,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2025-03-16 13:37:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 13:37:10,227 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:10,227 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:10,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:37:10,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:10,428 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:10,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1452148561, now seen corresponding path program 5 times [2025-03-16 13:37:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513715498] [2025-03-16 13:37:10,428 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:37:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:10,439 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-03-16 13:37:10,447 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:37:10,447 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 13:37:10,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 13:37:10,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:10,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513715498] [2025-03-16 13:37:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513715498] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:10,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399619404] [2025-03-16 13:37:10,564 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:37:10,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:10,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:10,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:37:10,610 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-03-16 13:37:10,639 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:37:10,639 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-16 13:37:10,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:10,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 13:37:10,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 13:37:10,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 13:37:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399619404] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:10,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:10,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-16 13:37:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660953387] [2025-03-16 13:37:10,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:10,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:37:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:10,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:37:10,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:37:10,846 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2025-03-16 13:37:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:10,925 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2025-03-16 13:37:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 13:37:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) Word has length 21 [2025-03-16 13:37:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:10,926 INFO L225 Difference]: With dead ends: 46 [2025-03-16 13:37:10,926 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 13:37:10,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:37:10,927 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:10,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 42 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:37:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 13:37:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2025-03-16 13:37:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2025-03-16 13:37:10,931 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2025-03-16 13:37:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:10,931 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2025-03-16 13:37:10,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2025-03-16 13:37:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2025-03-16 13:37:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 13:37:10,932 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:10,932 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:10,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:11,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:11,133 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:11,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:11,133 INFO L85 PathProgramCache]: Analyzing trace with hash 556908153, now seen corresponding path program 6 times [2025-03-16 13:37:11,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:11,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150634372] [2025-03-16 13:37:11,133 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:37:11,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:11,140 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-03-16 13:37:11,157 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 13:37:11,157 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 13:37:11,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:11,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:11,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150634372] [2025-03-16 13:37:11,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150634372] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:11,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155982513] [2025-03-16 13:37:11,786 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:37:11,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:11,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:11,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:11,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:37:11,830 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-03-16 13:37:11,846 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 13:37:11,846 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-16 13:37:11,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:11,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-16 13:37:11,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:12,050 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 26 treesize of output 27 [2025-03-16 13:37:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:12,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:12,346 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-03-16 13:37:12,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2025-03-16 13:37:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155982513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:12,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:12,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 44 [2025-03-16 13:37:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574075734] [2025-03-16 13:37:12,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:12,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-16 13:37:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:12,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-16 13:37:12,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2025-03-16 13:37:12,643 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:13,648 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2025-03-16 13:37:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-16 13:37:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-03-16 13:37:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:13,648 INFO L225 Difference]: With dead ends: 98 [2025-03-16 13:37:13,648 INFO L226 Difference]: Without dead ends: 87 [2025-03-16 13:37:13,650 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=4665, Unknown=0, NotChecked=0, Total=5700 [2025-03-16 13:37:13,651 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 210 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:13,651 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 181 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:37:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-16 13:37:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 42. [2025-03-16 13:37:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2025-03-16 13:37:13,660 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 22 [2025-03-16 13:37:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:13,660 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2025-03-16 13:37:13,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2025-03-16 13:37:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:37:13,661 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:13,661 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:13,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:37:13,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 13:37:13,862 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:13,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:13,862 INFO L85 PathProgramCache]: Analyzing trace with hash 676343097, now seen corresponding path program 7 times [2025-03-16 13:37:13,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:13,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33218692] [2025-03-16 13:37:13,862 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:37:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:13,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:37:13,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:37:13,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:13,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 13:37:14,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:14,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33218692] [2025-03-16 13:37:14,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33218692] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:14,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889581551] [2025-03-16 13:37:14,087 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:37:14,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:14,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:14,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:37:14,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:37:14,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:37:14,154 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:14,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:14,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:37:14,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 13:37:14,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 13:37:14,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889581551] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:14,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:14,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2025-03-16 13:37:14,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031622904] [2025-03-16 13:37:14,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:14,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 13:37:14,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:14,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 13:37:14,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:37:14,592 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:14,845 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2025-03-16 13:37:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-16 13:37:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 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 24 [2025-03-16 13:37:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:14,845 INFO L225 Difference]: With dead ends: 103 [2025-03-16 13:37:14,845 INFO L226 Difference]: Without dead ends: 90 [2025-03-16 13:37:14,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1240, Unknown=0, NotChecked=0, Total=1640 [2025-03-16 13:37:14,846 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:14,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 173 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:37:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-16 13:37:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 44. [2025-03-16 13:37:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2025-03-16 13:37:14,856 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 24 [2025-03-16 13:37:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:14,857 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2025-03-16 13:37:14,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2025-03-16 13:37:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 13:37:14,857 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:14,857 INFO L218 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:14,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:15,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:15,059 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:15,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1743220626, now seen corresponding path program 8 times [2025-03-16 13:37:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118121927] [2025-03-16 13:37:15,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:15,066 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-16 13:37:15,073 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:37:15,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:15,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:37:15,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118121927] [2025-03-16 13:37:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118121927] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105790055] [2025-03-16 13:37:15,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:15,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:15,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:15,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:37:15,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-16 13:37:15,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:37:15,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:15,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:15,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-16 13:37:15,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:15,425 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2025-03-16 13:37:15,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:37:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 13:37:16,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:16,683 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-03-16 13:37:16,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2025-03-16 13:37:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:37:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105790055] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:16,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:16,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2025-03-16 13:37:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643115526] [2025-03-16 13:37:16,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:16,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:37:16,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:16,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:37:16,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=414, Unknown=3, NotChecked=0, Total=506 [2025-03-16 13:37:16,719 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:16,884 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2025-03-16 13:37:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:37:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-16 13:37:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:16,885 INFO L225 Difference]: With dead ends: 69 [2025-03-16 13:37:16,885 INFO L226 Difference]: Without dead ends: 67 [2025-03-16 13:37:16,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=447, Unknown=3, NotChecked=0, Total=552 [2025-03-16 13:37:16,885 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:16,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 153 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:37:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-03-16 13:37:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2025-03-16 13:37:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2025-03-16 13:37:16,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2025-03-16 13:37:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:16,895 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2025-03-16 13:37:16,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2025-03-16 13:37:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 13:37:16,898 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:16,898 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:16,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:17,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 13:37:17,099 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:17,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:17,099 INFO L85 PathProgramCache]: Analyzing trace with hash -607005614, now seen corresponding path program 9 times [2025-03-16 13:37:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:17,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291016] [2025-03-16 13:37:17,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:37:17,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:17,106 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-03-16 13:37:17,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:37:17,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:37:17,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:37:17,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:17,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291016] [2025-03-16 13:37:17,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291016] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:17,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028384887] [2025-03-16 13:37:17,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:37:17,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:17,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:17,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:37:17,890 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 4 equivalence classes. [2025-03-16 13:37:17,940 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 13:37:17,940 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:37:17,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:17,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-16 13:37:17,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:18,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:37:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:18,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:37:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:18,260 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2025-03-16 13:37:18,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2025-03-16 13:37:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:18,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:18,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 91 [2025-03-16 13:37:18,824 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 255286 treesize of output 253238 [2025-03-16 13:37:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:19,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028384887] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:19,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:19,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 46 [2025-03-16 13:37:19,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461407419] [2025-03-16 13:37:19,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:19,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-16 13:37:19,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:19,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-16 13:37:19,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 13:37:19,099 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:20,244 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2025-03-16 13:37:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-16 13:37:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-03-16 13:37:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:20,245 INFO L225 Difference]: With dead ends: 105 [2025-03-16 13:37:20,245 INFO L226 Difference]: Without dead ends: 66 [2025-03-16 13:37:20,246 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1360, Invalid=4960, Unknown=0, NotChecked=0, Total=6320 [2025-03-16 13:37:20,247 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 172 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:20,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 148 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:37:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-16 13:37:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2025-03-16 13:37:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2025-03-16 13:37:20,257 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2025-03-16 13:37:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:20,257 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2025-03-16 13:37:20,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 46 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2025-03-16 13:37:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 13:37:20,258 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:20,258 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:20,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 13:37:20,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:37:20,458 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:20,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1835220419, now seen corresponding path program 10 times [2025-03-16 13:37:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:20,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163982935] [2025-03-16 13:37:20,459 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:37:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:20,465 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-16 13:37:20,468 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 28 statements. [2025-03-16 13:37:20,468 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:37:20,468 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:37:20,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:20,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163982935] [2025-03-16 13:37:20,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163982935] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:20,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928615695] [2025-03-16 13:37:20,782 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:37:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:20,784 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:20,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:37:20,846 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-16 13:37:20,859 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 28 statements. [2025-03-16 13:37:20,859 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:37:20,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:20,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-16 13:37:20,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:20,993 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2025-03-16 13:37:20,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2025-03-16 13:37:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:37:21,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:21,364 INFO L349 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2025-03-16 13:37:21,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2025-03-16 13:37:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:37:21,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928615695] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:21,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:21,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2025-03-16 13:37:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781647587] [2025-03-16 13:37:21,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:21,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 13:37:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:21,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 13:37:21,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:37:21,492 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:22,242 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2025-03-16 13:37:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-16 13:37:22,242 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-03-16 13:37:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:22,243 INFO L225 Difference]: With dead ends: 77 [2025-03-16 13:37:22,243 INFO L226 Difference]: Without dead ends: 75 [2025-03-16 13:37:22,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=544, Invalid=2536, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:37:22,244 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:22,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 146 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:37:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-16 13:37:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2025-03-16 13:37:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2025-03-16 13:37:22,272 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 28 [2025-03-16 13:37:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:22,272 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2025-03-16 13:37:22,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2025-03-16 13:37:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 13:37:22,273 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:22,273 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:22,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 13:37:22,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-16 13:37:22,477 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:22,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1883048462, now seen corresponding path program 11 times [2025-03-16 13:37:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:22,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199249998] [2025-03-16 13:37:22,477 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:37:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:22,485 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 5 equivalence classes. [2025-03-16 13:37:22,514 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:37:22,514 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:37:22,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:23,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199249998] [2025-03-16 13:37:23,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199249998] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415437904] [2025-03-16 13:37:23,175 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:37:23,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:23,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:23,181 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:37:23,274 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 5 equivalence classes. [2025-03-16 13:37:23,415 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 13:37:23,415 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 13:37:23,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:23,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-16 13:37:23,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:23,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2025-03-16 13:37:23,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:23,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2025-03-16 13:37:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:24,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:24,132 INFO L349 Elim1Store]: treesize reduction 20, result has 76.5 percent of original size [2025-03-16 13:37:24,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 111 [2025-03-16 13:37:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:24,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415437904] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:24,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:24,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2025-03-16 13:37:24,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501947053] [2025-03-16 13:37:24,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:24,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-16 13:37:24,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:24,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-16 13:37:24,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 13:37:24,397 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:26,856 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2025-03-16 13:37:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-03-16 13:37:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 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 31 [2025-03-16 13:37:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:26,858 INFO L225 Difference]: With dead ends: 185 [2025-03-16 13:37:26,858 INFO L226 Difference]: Without dead ends: 168 [2025-03-16 13:37:26,860 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1370, Invalid=10186, Unknown=0, NotChecked=0, Total=11556 [2025-03-16 13:37:26,860 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 331 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:26,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 316 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:37:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-03-16 13:37:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 77. [2025-03-16 13:37:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2025-03-16 13:37:26,897 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 31 [2025-03-16 13:37:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:26,897 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2025-03-16 13:37:26,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2025-03-16 13:37:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:37:26,899 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:26,899 INFO L218 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:26,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 13:37:27,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-16 13:37:27,104 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:27,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1351562062, now seen corresponding path program 12 times [2025-03-16 13:37:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:27,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945882462] [2025-03-16 13:37:27,104 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:37:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:27,111 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-16 13:37:27,130 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:37:27,130 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:37:27,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 13:37:27,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945882462] [2025-03-16 13:37:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945882462] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69075263] [2025-03-16 13:37:27,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:37:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:27,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:27,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:37:27,413 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 33 statements into 5 equivalence classes. [2025-03-16 13:37:27,584 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:37:27,584 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-16 13:37:27,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:27,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:37:27,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 13:37:27,752 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-03-16 13:37:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69075263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:28,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:28,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2025-03-16 13:37:28,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609917758] [2025-03-16 13:37:28,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:28,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-16 13:37:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:28,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-16 13:37:28,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2025-03-16 13:37:28,116 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:28,474 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2025-03-16 13:37:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:37:28,474 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2025-03-16 13:37:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:28,475 INFO L225 Difference]: With dead ends: 154 [2025-03-16 13:37:28,475 INFO L226 Difference]: Without dead ends: 105 [2025-03-16 13:37:28,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=2102, Unknown=0, NotChecked=0, Total=2756 [2025-03-16 13:37:28,476 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 136 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:28,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 305 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:37:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-16 13:37:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2025-03-16 13:37:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 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) [2025-03-16 13:37:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2025-03-16 13:37:28,497 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 33 [2025-03-16 13:37:28,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:28,497 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2025-03-16 13:37:28,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:28,497 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2025-03-16 13:37:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:37:28,498 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:28,498 INFO L218 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:28,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 13:37:28,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:28,698 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:28,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash -278884359, now seen corresponding path program 13 times [2025-03-16 13:37:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:28,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970129920] [2025-03-16 13:37:28,699 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:37:28,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:28,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 13:37:28,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:37:28,714 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:28,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:29,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:29,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970129920] [2025-03-16 13:37:29,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970129920] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:29,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226344543] [2025-03-16 13:37:29,476 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:37:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:29,477 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:29,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 13:37:29,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 13:37:29,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:37:29,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:29,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:29,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-16 13:37:29,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:29,904 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 26 treesize of output 27 [2025-03-16 13:37:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:30,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:30,329 INFO L349 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2025-03-16 13:37:30,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 48 [2025-03-16 13:37:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:30,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226344543] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:30,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:30,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 25] total 67 [2025-03-16 13:37:30,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586914464] [2025-03-16 13:37:30,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:30,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2025-03-16 13:37:30,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:30,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2025-03-16 13:37:30,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=3918, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 13:37:30,854 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 67 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 67 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:33,164 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2025-03-16 13:37:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-16 13:37:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 67 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-16 13:37:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:33,165 INFO L225 Difference]: With dead ends: 220 [2025-03-16 13:37:33,165 INFO L226 Difference]: Without dead ends: 200 [2025-03-16 13:37:33,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2412, Invalid=12840, Unknown=0, NotChecked=0, Total=15252 [2025-03-16 13:37:33,168 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 390 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:33,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 570 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:37:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-03-16 13:37:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 86. [2025-03-16 13:37:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1647058823529413) internal successors, (99), 85 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2025-03-16 13:37:33,198 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 34 [2025-03-16 13:37:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:33,198 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2025-03-16 13:37:33,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 67 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2025-03-16 13:37:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 13:37:33,199 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:33,199 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:33,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 13:37:33,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-16 13:37:33,399 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:33,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1329751197, now seen corresponding path program 14 times [2025-03-16 13:37:33,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:33,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399840162] [2025-03-16 13:37:33,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:33,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:33,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:37:33,417 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:37:33,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:33,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399840162] [2025-03-16 13:37:34,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399840162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363025157] [2025-03-16 13:37:34,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:34,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:34,072 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:34,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 13:37:34,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-16 13:37:34,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 13:37:34,152 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:34,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:34,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-16 13:37:34,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:34,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:37:34,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2025-03-16 13:37:34,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:34,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2025-03-16 13:37:34,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:34,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 79 [2025-03-16 13:37:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:34,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:35,094 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 133 treesize of output 131 [2025-03-16 13:37:35,115 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 7909726 treesize of output 7893342 [2025-03-16 13:37:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:35,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363025157] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:35,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:35,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 23] total 61 [2025-03-16 13:37:35,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933737102] [2025-03-16 13:37:35,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:35,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-16 13:37:35,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:35,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-16 13:37:35,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3193, Unknown=0, NotChecked=0, Total=3660 [2025-03-16 13:37:35,617 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 61 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 61 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:37,093 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2025-03-16 13:37:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-16 13:37:37,094 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 61 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-16 13:37:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:37,094 INFO L225 Difference]: With dead ends: 153 [2025-03-16 13:37:37,094 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 13:37:37,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3018 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1885, Invalid=8417, Unknown=0, NotChecked=0, Total=10302 [2025-03-16 13:37:37,095 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 239 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:37,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 178 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 13:37:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 13:37:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2025-03-16 13:37:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2025-03-16 13:37:37,128 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 34 [2025-03-16 13:37:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:37,128 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2025-03-16 13:37:37,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 61 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2025-03-16 13:37:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 13:37:37,129 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:37,129 INFO L218 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:37,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-16 13:37:37,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 13:37:37,330 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:37,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1754193593, now seen corresponding path program 15 times [2025-03-16 13:37:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:37,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774952130] [2025-03-16 13:37:37,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:37:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:37,343 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 6 equivalence classes. [2025-03-16 13:37:37,354 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 34 of 36 statements. [2025-03-16 13:37:37,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:37:37,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:37:37,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774952130] [2025-03-16 13:37:37,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774952130] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:37,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271849400] [2025-03-16 13:37:37,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:37:37,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:37,836 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:37,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 13:37:37,906 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 6 equivalence classes. [2025-03-16 13:37:38,049 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 34 of 36 statements. [2025-03-16 13:37:38,050 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-16 13:37:38,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:38,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-16 13:37:38,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:38,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:37:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:38,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:37:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:37:38,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:38,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2025-03-16 13:37:38,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2025-03-16 13:37:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:37:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271849400] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:38,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:38,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2025-03-16 13:37:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934151838] [2025-03-16 13:37:38,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:38,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 13:37:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:38,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 13:37:38,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:37:38,823 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:39,542 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2025-03-16 13:37:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-16 13:37:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2025-03-16 13:37:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:39,546 INFO L225 Difference]: With dead ends: 175 [2025-03-16 13:37:39,546 INFO L226 Difference]: Without dead ends: 173 [2025-03-16 13:37:39,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=527, Invalid=2779, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 13:37:39,547 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:39,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 101 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:37:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2025-03-16 13:37:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 61. [2025-03-16 13:37:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2025-03-16 13:37:39,573 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 36 [2025-03-16 13:37:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:39,573 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2025-03-16 13:37:39,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2025-03-16 13:37:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 13:37:39,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:39,573 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:39,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 13:37:39,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:39,774 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:39,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1979855854, now seen corresponding path program 16 times [2025-03-16 13:37:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:39,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673389230] [2025-03-16 13:37:39,774 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:37:39,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:39,783 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-16 13:37:39,786 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 27 of 39 statements. [2025-03-16 13:37:39,787 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:37:39,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:37:40,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:40,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673389230] [2025-03-16 13:37:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673389230] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682836393] [2025-03-16 13:37:40,175 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:37:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:40,176 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:40,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 13:37:40,246 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-16 13:37:40,257 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 27 of 39 statements. [2025-03-16 13:37:40,258 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:37:40,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:40,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 13:37:40,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:40,381 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2025-03-16 13:37:40,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2025-03-16 13:37:40,426 INFO L349 Elim1Store]: treesize reduction 89, result has 32.6 percent of original size [2025-03-16 13:37:40,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 79 [2025-03-16 13:37:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:37:40,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:41,109 INFO L349 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2025-03-16 13:37:41,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 63 [2025-03-16 13:37:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:37:41,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682836393] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:41,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:41,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2025-03-16 13:37:41,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019103281] [2025-03-16 13:37:41,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:41,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-16 13:37:41,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:41,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-16 13:37:41,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2025-03-16 13:37:41,221 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:43,424 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2025-03-16 13:37:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-03-16 13:37:43,424 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-16 13:37:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:43,425 INFO L225 Difference]: With dead ends: 220 [2025-03-16 13:37:43,425 INFO L226 Difference]: Without dead ends: 218 [2025-03-16 13:37:43,425 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1232, Invalid=6078, Unknown=0, NotChecked=0, Total=7310 [2025-03-16 13:37:43,426 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 317 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:43,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 195 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:37:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2025-03-16 13:37:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 89. [2025-03-16 13:37:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1704545454545454) internal successors, (103), 88 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2025-03-16 13:37:43,474 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 39 [2025-03-16 13:37:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:43,474 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2025-03-16 13:37:43,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2025-03-16 13:37:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 13:37:43,475 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:43,475 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:43,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 13:37:43,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:43,675 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:43,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash 72086873, now seen corresponding path program 17 times [2025-03-16 13:37:43,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:43,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153280665] [2025-03-16 13:37:43,676 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:37:43,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:43,683 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 7 equivalence classes. [2025-03-16 13:37:43,701 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 13:37:43,701 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:37:43,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:37:44,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153280665] [2025-03-16 13:37:44,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153280665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155741245] [2025-03-16 13:37:44,556 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:37:44,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:44,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:44,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 13:37:44,629 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 7 equivalence classes. [2025-03-16 13:37:44,845 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 13:37:44,845 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-16 13:37:44,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:44,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-16 13:37:44,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:37:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:45,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2025-03-16 13:37:45,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:37:45,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:45,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2025-03-16 13:37:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:45,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:46,399 INFO L349 Elim1Store]: treesize reduction 30, result has 81.6 percent of original size [2025-03-16 13:37:46,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 198 [2025-03-16 13:37:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:46,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155741245] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:46,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 71 [2025-03-16 13:37:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040595477] [2025-03-16 13:37:46,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:46,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-16 13:37:46,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:46,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-16 13:37:46,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=4408, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:37:46,973 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 71 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:49,022 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2025-03-16 13:37:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-16 13:37:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 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 40 [2025-03-16 13:37:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:49,023 INFO L225 Difference]: With dead ends: 190 [2025-03-16 13:37:49,023 INFO L226 Difference]: Without dead ends: 188 [2025-03-16 13:37:49,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1603, Invalid=9527, Unknown=0, NotChecked=0, Total=11130 [2025-03-16 13:37:49,024 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 585 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:49,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 326 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 13:37:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2025-03-16 13:37:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2025-03-16 13:37:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.191304347826087) internal successors, (137), 115 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2025-03-16 13:37:49,098 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 40 [2025-03-16 13:37:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:49,098 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2025-03-16 13:37:49,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.619718309859155) internal successors, (115), 71 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2025-03-16 13:37:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 13:37:49,099 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:49,099 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:49,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-16 13:37:49,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:49,300 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:49,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1138811182, now seen corresponding path program 18 times [2025-03-16 13:37:49,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:49,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086448151] [2025-03-16 13:37:49,301 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:37:49,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:49,310 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 43 statements into 6 equivalence classes. [2025-03-16 13:37:49,328 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:37:49,328 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 13:37:49,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 13:37:49,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:49,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086448151] [2025-03-16 13:37:49,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086448151] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:49,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026186460] [2025-03-16 13:37:49,611 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:37:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:49,613 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:49,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 13:37:49,695 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 43 statements into 6 equivalence classes. [2025-03-16 13:37:50,327 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:37:50,327 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 13:37:50,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:50,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-16 13:37:50,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 13:37:50,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 36 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-16 13:37:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026186460] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:50,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2025-03-16 13:37:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660453354] [2025-03-16 13:37:50,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:50,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-16 13:37:50,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:50,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-16 13:37:50,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=1857, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 13:37:50,959 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:51,652 INFO L93 Difference]: Finished difference Result 384 states and 427 transitions. [2025-03-16 13:37:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-16 13:37:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 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 43 [2025-03-16 13:37:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:51,653 INFO L225 Difference]: With dead ends: 384 [2025-03-16 13:37:51,653 INFO L226 Difference]: Without dead ends: 332 [2025-03-16 13:37:51,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1591, Invalid=3811, Unknown=0, NotChecked=0, Total=5402 [2025-03-16 13:37:51,655 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 274 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:51,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 196 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:37:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2025-03-16 13:37:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 125. [2025-03-16 13:37:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.185483870967742) internal successors, (147), 124 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2025-03-16 13:37:51,736 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 43 [2025-03-16 13:37:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:51,736 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2025-03-16 13:37:51,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2025-03-16 13:37:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 13:37:51,736 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:51,736 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:51,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 13:37:51,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 13:37:51,937 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:51,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 57258354, now seen corresponding path program 19 times [2025-03-16 13:37:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360794782] [2025-03-16 13:37:51,937 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:37:51,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:51,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 13:37:51,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:37:51,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:51,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:53,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:53,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360794782] [2025-03-16 13:37:53,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360794782] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:53,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411166770] [2025-03-16 13:37:53,243 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:37:53,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:53,245 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:53,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 13:37:53,327 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 13:37:53,351 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 13:37:53,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:37:53,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:53,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-16 13:37:53,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:53,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-16 13:37:53,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2025-03-16 13:37:53,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:53,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 51 [2025-03-16 13:37:53,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:53,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 79 [2025-03-16 13:37:53,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:37:53,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 107 [2025-03-16 13:37:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:54,573 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:37:55,000 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 173 treesize of output 171 [2025-03-16 13:37:55,015 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 7888298 treesize of output 7884202 [2025-03-16 13:37:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:37:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411166770] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:37:55,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:37:55,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 75 [2025-03-16 13:37:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841432024] [2025-03-16 13:37:55,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:37:55,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-03-16 13:37:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:37:55,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-03-16 13:37:55,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=4935, Unknown=0, NotChecked=0, Total=5550 [2025-03-16 13:37:55,770 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 75 states, 75 states have (on average 1.64) internal successors, (123), 75 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:37:58,870 INFO L93 Difference]: Finished difference Result 317 states and 346 transitions. [2025-03-16 13:37:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2025-03-16 13:37:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.64) internal successors, (123), 75 states have internal predecessors, (123), 0 states have call successors, (0), 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 43 [2025-03-16 13:37:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:37:58,872 INFO L225 Difference]: With dead ends: 317 [2025-03-16 13:37:58,872 INFO L226 Difference]: Without dead ends: 291 [2025-03-16 13:37:58,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4297 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2987, Invalid=14043, Unknown=0, NotChecked=0, Total=17030 [2025-03-16 13:37:58,873 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 424 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 13:37:58,873 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 440 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 13:37:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2025-03-16 13:37:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 151. [2025-03-16 13:37:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1733333333333333) internal successors, (176), 150 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2025-03-16 13:37:58,983 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 43 [2025-03-16 13:37:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:37:58,983 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2025-03-16 13:37:58,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.64) internal successors, (123), 75 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:37:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2025-03-16 13:37:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 13:37:58,984 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:37:58,984 INFO L218 NwaCegarLoop]: trace histogram [12, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:37:58,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 13:37:59,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-16 13:37:59,184 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:37:59,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:37:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash 423162866, now seen corresponding path program 20 times [2025-03-16 13:37:59,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:37:59,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327589360] [2025-03-16 13:37:59,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:59,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:37:59,194 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:37:59,199 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:37:59,199 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:59,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 55 proven. 33 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 13:37:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:37:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327589360] [2025-03-16 13:37:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327589360] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:37:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330668220] [2025-03-16 13:37:59,560 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:37:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:37:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:37:59,562 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:37:59,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 13:37:59,649 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-16 13:37:59,677 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 13:37:59,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:37:59,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:37:59,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 13:37:59,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:37:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 13:37:59,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 78 proven. 10 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-16 13:38:00,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330668220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:00,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:00,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 58 [2025-03-16 13:38:00,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104441138] [2025-03-16 13:38:00,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:00,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-03-16 13:38:00,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:00,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-03-16 13:38:00,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2025-03-16 13:38:00,465 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 58 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:01,388 INFO L93 Difference]: Finished difference Result 340 states and 366 transitions. [2025-03-16 13:38:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-16 13:38:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 13:38:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:01,390 INFO L225 Difference]: With dead ends: 340 [2025-03-16 13:38:01,390 INFO L226 Difference]: Without dead ends: 269 [2025-03-16 13:38:01,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1844, Invalid=5466, Unknown=0, NotChecked=0, Total=7310 [2025-03-16 13:38:01,391 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 299 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:01,391 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 632 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 13:38:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2025-03-16 13:38:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 128. [2025-03-16 13:38:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 127 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2025-03-16 13:38:01,483 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 47 [2025-03-16 13:38:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:01,483 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2025-03-16 13:38:01,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2025-03-16 13:38:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 13:38:01,484 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:01,484 INFO L218 NwaCegarLoop]: trace histogram [16, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:01,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-16 13:38:01,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:01,684 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:01,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash 759564946, now seen corresponding path program 21 times [2025-03-16 13:38:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:01,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058705129] [2025-03-16 13:38:01,685 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:38:01,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:01,699 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 9 equivalence classes. [2025-03-16 13:38:01,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 43 of 49 statements. [2025-03-16 13:38:01,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:38:01,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-03-16 13:38:02,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058705129] [2025-03-16 13:38:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058705129] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843265384] [2025-03-16 13:38:02,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:38:02,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:02,384 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:38:02,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 13:38:02,480 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 9 equivalence classes. [2025-03-16 13:38:02,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 43 of 49 statements. [2025-03-16 13:38:02,910 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:38:02,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:02,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-16 13:38:02,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:02,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:38:03,124 INFO L349 Elim1Store]: treesize reduction 26, result has 43.5 percent of original size [2025-03-16 13:38:03,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2025-03-16 13:38:03,174 INFO L349 Elim1Store]: treesize reduction 84, result has 33.3 percent of original size [2025-03-16 13:38:03,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 73 [2025-03-16 13:38:03,248 INFO L349 Elim1Store]: treesize reduction 288, result has 13.0 percent of original size [2025-03-16 13:38:03,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 110 treesize of output 122 [2025-03-16 13:38:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-16 13:38:03,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:04,208 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 131 treesize of output 129 [2025-03-16 13:38:04,213 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 121302 treesize of output 121046 [2025-03-16 13:38:04,284 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 131 treesize of output 129 [2025-03-16 13:38:04,291 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 242830 treesize of output 242318 [2025-03-16 13:38:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 3 proven. 73 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-03-16 13:38:04,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843265384] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:04,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 18] total 55 [2025-03-16 13:38:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584264791] [2025-03-16 13:38:04,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:04,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-16 13:38:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:04,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-16 13:38:04,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 13:38:04,821 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:09,415 INFO L93 Difference]: Finished difference Result 273 states and 290 transitions. [2025-03-16 13:38:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-03-16 13:38:09,415 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-16 13:38:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:09,416 INFO L225 Difference]: With dead ends: 273 [2025-03-16 13:38:09,416 INFO L226 Difference]: Without dead ends: 271 [2025-03-16 13:38:09,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1716, Invalid=13046, Unknown=0, NotChecked=0, Total=14762 [2025-03-16 13:38:09,417 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 534 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:09,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 547 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 13:38:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2025-03-16 13:38:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 107. [2025-03-16 13:38:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2025-03-16 13:38:09,496 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 49 [2025-03-16 13:38:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:09,496 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2025-03-16 13:38:09,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2025-03-16 13:38:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 13:38:09,497 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:09,497 INFO L218 NwaCegarLoop]: trace histogram [12, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:09,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 13:38:09,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:09,697 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:09,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash 883601746, now seen corresponding path program 22 times [2025-03-16 13:38:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133070664] [2025-03-16 13:38:09,698 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:38:09,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:09,707 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-16 13:38:09,711 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 49 statements. [2025-03-16 13:38:09,712 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:38:09,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 13:38:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133070664] [2025-03-16 13:38:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133070664] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304249080] [2025-03-16 13:38:10,258 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:38:10,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:10,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:10,260 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:38:10,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 13:38:10,358 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 49 statements into 2 equivalence classes. [2025-03-16 13:38:10,380 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 35 of 49 statements. [2025-03-16 13:38:10,380 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-16 13:38:10,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:10,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-16 13:38:10,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:10,549 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2025-03-16 13:38:10,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2025-03-16 13:38:10,597 INFO L349 Elim1Store]: treesize reduction 89, result has 32.6 percent of original size [2025-03-16 13:38:10,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 79 [2025-03-16 13:38:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 13:38:11,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:11,587 INFO L349 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2025-03-16 13:38:11,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 63 [2025-03-16 13:38:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2025-03-16 13:38:11,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304249080] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:11,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:11,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 52 [2025-03-16 13:38:11,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056933252] [2025-03-16 13:38:11,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:11,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-16 13:38:11,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:11,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-16 13:38:11,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2302, Unknown=0, NotChecked=0, Total=2652 [2025-03-16 13:38:11,792 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:15,694 INFO L93 Difference]: Finished difference Result 316 states and 336 transitions. [2025-03-16 13:38:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2025-03-16 13:38:15,694 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-16 13:38:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:15,695 INFO L225 Difference]: With dead ends: 316 [2025-03-16 13:38:15,695 INFO L226 Difference]: Without dead ends: 314 [2025-03-16 13:38:15,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3619 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1838, Invalid=11968, Unknown=0, NotChecked=0, Total=13806 [2025-03-16 13:38:15,696 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 553 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:15,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 750 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 13:38:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2025-03-16 13:38:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 135. [2025-03-16 13:38:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 134 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2025-03-16 13:38:15,820 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 49 [2025-03-16 13:38:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:15,820 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2025-03-16 13:38:15,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2025-03-16 13:38:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 13:38:15,820 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:15,820 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:15,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-16 13:38:16,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-16 13:38:16,021 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:16,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash -730903250, now seen corresponding path program 23 times [2025-03-16 13:38:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:16,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611026626] [2025-03-16 13:38:16,021 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:38:16,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:16,030 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 9 equivalence classes. [2025-03-16 13:38:16,048 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 13:38:16,048 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-16 13:38:16,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:38:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611026626] [2025-03-16 13:38:16,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611026626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418227305] [2025-03-16 13:38:16,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:38:16,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:16,816 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:38:16,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 13:38:16,926 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 9 equivalence classes. [2025-03-16 13:38:17,433 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 13:38:17,433 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-03-16 13:38:17,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:17,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 71 conjuncts are in the unsatisfiable core [2025-03-16 13:38:17,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:17,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:38:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:38:17,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2025-03-16 13:38:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:38:17,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2025-03-16 13:38:17,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:17,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:38:17,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 139 [2025-03-16 13:38:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:18,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:19,549 INFO L349 Elim1Store]: treesize reduction 40, result has 84.9 percent of original size [2025-03-16 13:38:19,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 173 treesize of output 309 [2025-03-16 13:38:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418227305] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:38:20,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:38:20,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 30] total 75 [2025-03-16 13:38:20,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737180601] [2025-03-16 13:38:20,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:38:20,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2025-03-16 13:38:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:38:20,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2025-03-16 13:38:20,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=4907, Unknown=0, NotChecked=0, Total=5550 [2025-03-16 13:38:20,334 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 75 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:38:25,311 INFO L93 Difference]: Finished difference Result 288 states and 310 transitions. [2025-03-16 13:38:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2025-03-16 13:38:25,312 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 75 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-03-16 13:38:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:38:25,313 INFO L225 Difference]: With dead ends: 288 [2025-03-16 13:38:25,313 INFO L226 Difference]: Without dead ends: 286 [2025-03-16 13:38:25,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2866, Invalid=16040, Unknown=0, NotChecked=0, Total=18906 [2025-03-16 13:38:25,314 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 687 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:38:25,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 558 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 13:38:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2025-03-16 13:38:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 161. [2025-03-16 13:38:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1375) internal successors, (182), 160 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 182 transitions. [2025-03-16 13:38:25,480 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 182 transitions. Word has length 49 [2025-03-16 13:38:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:38:25,480 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 182 transitions. [2025-03-16 13:38:25,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.7733333333333334) internal successors, (133), 75 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:38:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 182 transitions. [2025-03-16 13:38:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 13:38:25,480 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:38:25,480 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:38:25,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-16 13:38:25,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-16 13:38:25,681 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:38:25,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:38:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1146342781, now seen corresponding path program 24 times [2025-03-16 13:38:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:38:25,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136702986] [2025-03-16 13:38:25,681 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:38:25,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:38:25,691 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 52 statements into 10 equivalence classes. [2025-03-16 13:38:25,715 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 13:38:25,715 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 13:38:25,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 13:38:27,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:38:27,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136702986] [2025-03-16 13:38:27,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136702986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:38:27,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022155483] [2025-03-16 13:38:27,175 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:38:27,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:38:27,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:38:27,177 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 13:38:27,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 13:38:27,290 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 52 statements into 10 equivalence classes. [2025-03-16 13:38:27,519 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 13:38:27,519 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-16 13:38:27,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:38:27,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-16 13:38:27,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:38:27,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-16 13:38:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2025-03-16 13:38:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,904 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2025-03-16 13:38:27,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2025-03-16 13:38:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:27,973 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2025-03-16 13:38:27,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2025-03-16 13:38:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,068 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2025-03-16 13:38:28,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2025-03-16 13:38:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-16 13:38:28,192 INFO L349 Elim1Store]: treesize reduction 160, result has 18.8 percent of original size [2025-03-16 13:38:28,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 33 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2025-03-16 13:38:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:38:29,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:38:30,409 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 213 treesize of output 211