./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:31:32,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:31:32,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:31:32,825 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:31:32,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:31:32,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:31:32,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:31:32,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:31:32,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:31:32,844 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:31:32,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:31:32,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:31:32,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:31:32,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:31:32,844 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:31:32,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:31:32,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:31:32,846 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:31:32,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:31:32,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:31:32,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:31:32,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:31:32,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:31:32,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:31:32,847 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:31:32,847 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:31:32,847 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 -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2025-03-03 13:31:33,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:31:33,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:31:33,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:31:33,065 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:31:33,065 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:31:33,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2025-03-03 13:31:34,190 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a0356e/b74de543ddb749d79f37bd8141faf098/FLAGeb8c4109f [2025-03-03 13:31:34,369 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:31:34,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2025-03-03 13:31:34,391 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a0356e/b74de543ddb749d79f37bd8141faf098/FLAGeb8c4109f [2025-03-03 13:31:34,413 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a0356e/b74de543ddb749d79f37bd8141faf098 [2025-03-03 13:31:34,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:31:34,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:31:34,418 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:31:34,418 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:31:34,422 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:31:34,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758d9311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34, skipping insertion in model container [2025-03-03 13:31:34,423 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,435 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:31:34,526 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2025-03-03 13:31:34,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:31:34,544 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:31:34,551 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2025-03-03 13:31:34,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:31:34,565 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:31:34,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34 WrapperNode [2025-03-03 13:31:34,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:31:34,567 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:31:34,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:31:34,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:31:34,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,584 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2025-03-03 13:31:34,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:31:34,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:31:34,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:31:34,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:31:34,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,606 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-03 13:31:34,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,609 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:31:34,613 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:31:34,613 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:31:34,613 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:31:34,613 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (1/1) ... [2025-03-03 13:31:34,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:31:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:31:34,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:31:34,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:31:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:31:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:31:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 13:31:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:31:34,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:31:34,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:31:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 13:31:34,701 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:31:34,703 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:31:34,785 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-03-03 13:31:34,785 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:31:34,791 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:31:34,791 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:31:34,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:31:34 BoogieIcfgContainer [2025-03-03 13:31:34,791 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:31:34,793 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:31:34,793 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:31:34,796 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:31:34,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:31:34" (1/3) ... [2025-03-03 13:31:34,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d93f380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:31:34, skipping insertion in model container [2025-03-03 13:31:34,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:31:34" (2/3) ... [2025-03-03 13:31:34,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d93f380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:31:34, skipping insertion in model container [2025-03-03 13:31:34,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:31:34" (3/3) ... [2025-03-03 13:31:34,798 INFO L128 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2025-03-03 13:31:34,809 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:31:34,810 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG simple_array_index_value_1-1.i that has 2 procedures, 19 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 13:31:34,846 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:31:34,856 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;@26f7acc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:31:34,856 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:31:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:31:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-03 13:31:34,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:31:34,863 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:31:34,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:31:34,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:31:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2063296387, now seen corresponding path program 1 times [2025-03-03 13:31:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:31:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987835970] [2025-03-03 13:31:34,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:31:34,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-03 13:31:34,953 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-03 13:31:34,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:34,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:31:35,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:31:35,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987835970] [2025-03-03 13:31:35,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987835970] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:31:35,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:31:35,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 13:31:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360873718] [2025-03-03 13:31:35,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:31:35,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 13:31:35,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:31:35,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 13:31:35,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 13:31:35,079 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:31:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:31:35,129 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2025-03-03 13:31:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 13:31:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-03 13:31:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:31:35,136 INFO L225 Difference]: With dead ends: 41 [2025-03-03 13:31:35,136 INFO L226 Difference]: Without dead ends: 22 [2025-03-03 13:31:35,138 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 13:31:35,142 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:31:35,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:31:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-03 13:31:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2025-03-03 13:31:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:31:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-03 13:31:35,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2025-03-03 13:31:35,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:31:35,170 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-03 13:31:35,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:31:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-03 13:31:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 13:31:35,171 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:31:35,171 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:31:35,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:31:35,171 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:31:35,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:31:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2027172904, now seen corresponding path program 1 times [2025-03-03 13:31:35,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:31:35,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561370367] [2025-03-03 13:31:35,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:35,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:31:35,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:31:35,186 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:31:35,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:35,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:31:35,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:31:35,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561370367] [2025-03-03 13:31:35,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561370367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:31:35,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229907047] [2025-03-03 13:31:35,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:35,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:31:35,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:31:35,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:31:35,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:31:35,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:31:35,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:35,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:35,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 13:31:35,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:31:35,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 13:31:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:31:35,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:31:35,680 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 20 treesize of output 18 [2025-03-03 13:31:35,684 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 26 treesize of output 24 [2025-03-03 13:31:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:31:35,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229907047] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:31:35,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:31:35,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2025-03-03 13:31:35,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232711639] [2025-03-03 13:31:35,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:31:35,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:31:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:31:35,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:31:35,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:31:35,725 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:31:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:31:35,914 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2025-03-03 13:31:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 13:31:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-03 13:31:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:31:35,918 INFO L225 Difference]: With dead ends: 48 [2025-03-03 13:31:35,918 INFO L226 Difference]: Without dead ends: 33 [2025-03-03 13:31:35,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-03 13:31:35,918 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:31:35,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 86 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:31:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-03 13:31:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2025-03-03 13:31:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 13:31:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2025-03-03 13:31:35,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2025-03-03 13:31:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:31:35,923 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2025-03-03 13:31:35,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:31:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2025-03-03 13:31:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 13:31:35,924 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:31:35,924 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:31:35,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 13:31:36,124 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 [2025-03-03 13:31:36,125 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:31:36,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:31:36,125 INFO L85 PathProgramCache]: Analyzing trace with hash -553264311, now seen corresponding path program 1 times [2025-03-03 13:31:36,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:31:36,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85988171] [2025-03-03 13:31:36,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:36,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:31:36,130 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 13:31:36,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 13:31:36,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:36,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:31:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:31:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85988171] [2025-03-03 13:31:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85988171] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:31:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799827176] [2025-03-03 13:31:36,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:36,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:31:36,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:31:36,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:31:36,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 13:31:36,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 13:31:36,318 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:36,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:36,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:31:36,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:31:36,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 13:31:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:31:36,453 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:31:40,740 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 23 treesize of output 21 [2025-03-03 13:31:40,745 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 30 treesize of output 26 [2025-03-03 13:31:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:31:40,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799827176] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:31:40,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:31:40,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2025-03-03 13:31:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669175164] [2025-03-03 13:31:40,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:31:40,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 13:31:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:31:40,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 13:31:40,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2025-03-03 13:31:40,800 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 13:31:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:31:41,273 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2025-03-03 13:31:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 13:31:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2025-03-03 13:31:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:31:41,274 INFO L225 Difference]: With dead ends: 72 [2025-03-03 13:31:41,274 INFO L226 Difference]: Without dead ends: 48 [2025-03-03 13:31:41,275 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=159, Invalid=596, Unknown=1, NotChecked=0, Total=756 [2025-03-03 13:31:41,275 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:31:41,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 129 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:31:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-03 13:31:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2025-03-03 13:31:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 13:31:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2025-03-03 13:31:41,289 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2025-03-03 13:31:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:31:41,289 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2025-03-03 13:31:41,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-03 13:31:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2025-03-03 13:31:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:31:41,290 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:31:41,290 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:31:41,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:31:41,491 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,SelfDestructingSolverStorable2 [2025-03-03 13:31:41,491 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:31:41,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:31:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash -345638378, now seen corresponding path program 1 times [2025-03-03 13:31:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:31:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915205750] [2025-03-03 13:31:41,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:41,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:31:41,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:31:41,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:31:41,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:41,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 13:31:41,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:31:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915205750] [2025-03-03 13:31:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915205750] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:31:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870090513] [2025-03-03 13:31:41,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:31:41,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:31:41,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:31:41,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:31:41,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:31:41,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:31:41,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:31:41,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:41,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 13:31:41,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:31:41,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-03 13:31:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:31:41,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:31:42,152 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 22 treesize of output 20 [2025-03-03 13:31:42,155 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 28 treesize of output 24 [2025-03-03 13:31:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:31:42,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870090513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:31:42,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:31:42,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 23 [2025-03-03 13:31:42,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868214497] [2025-03-03 13:31:42,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:31:42,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:31:42,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:31:42,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:31:42,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:31:42,278 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 23 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 13:31:46,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-03 13:31:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:31:47,277 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2025-03-03 13:31:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 13:31:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2025-03-03 13:31:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:31:47,279 INFO L225 Difference]: With dead ends: 103 [2025-03-03 13:31:47,279 INFO L226 Difference]: Without dead ends: 71 [2025-03-03 13:31:47,280 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:31:47,280 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:31:47,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 172 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 295 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2025-03-03 13:31:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-03 13:31:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2025-03-03 13:31:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-03 13:31:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2025-03-03 13:31:47,291 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 30 [2025-03-03 13:31:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:31:47,291 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2025-03-03 13:31:47,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-03 13:31:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2025-03-03 13:31:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-03 13:31:47,292 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:31:47,292 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:31:47,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:31:47,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:47,492 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:31:47,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:31:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash 434763339, now seen corresponding path program 2 times [2025-03-03 13:31:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:31:47,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266406791] [2025-03-03 13:31:47,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:31:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:31:47,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-03 13:31:47,517 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 13:31:47,517 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:31:47,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 13:31:47,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:31:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266406791] [2025-03-03 13:31:47,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266406791] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:31:47,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632714777] [2025-03-03 13:31:47,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:31:47,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:31:47,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:31:47,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:31:47,657 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-03 13:31:47,674 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-03 13:31:47,674 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:31:47,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:47,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-03 13:31:47,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:31:47,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-03 13:31:47,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-03 13:31:47,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 13:31:47,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-03 13:31:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 13:31:48,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:31:53,073 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 153 treesize of output 147 [2025-03-03 13:31:53,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 13:31:53,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1418 treesize of output 1386 [2025-03-03 13:31:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:31:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632714777] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:31:53,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:31:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 24] total 46 [2025-03-03 13:31:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077311592] [2025-03-03 13:31:53,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:31:53,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-03 13:31:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:31:53,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-03 13:31:53,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:31:53,315 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 46 states, 40 states have (on average 1.875) internal successors, (75), 44 states have internal predecessors, (75), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-03 13:31:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:31:59,091 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2025-03-03 13:31:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-03 13:31:59,092 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.875) internal successors, (75), 44 states have internal predecessors, (75), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 40 [2025-03-03 13:31:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:31:59,092 INFO L225 Difference]: With dead ends: 149 [2025-03-03 13:31:59,092 INFO L226 Difference]: Without dead ends: 92 [2025-03-03 13:31:59,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=878, Invalid=3952, Unknown=0, NotChecked=0, Total=4830 [2025-03-03 13:31:59,095 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 13:31:59,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 178 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 13:31:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-03 13:31:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2025-03-03 13:31:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:31:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2025-03-03 13:31:59,112 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 40 [2025-03-03 13:31:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:31:59,112 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2025-03-03 13:31:59,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.875) internal successors, (75), 44 states have internal predecessors, (75), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2025-03-03 13:31:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2025-03-03 13:31:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-03 13:31:59,113 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:31:59,113 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-03 13:31:59,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-03 13:31:59,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:59,320 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:31:59,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:31:59,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1278352172, now seen corresponding path program 3 times [2025-03-03 13:31:59,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:31:59,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52911317] [2025-03-03 13:31:59,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:31:59,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:31:59,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 5 equivalence classes. [2025-03-03 13:31:59,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 50 statements. [2025-03-03 13:31:59,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:31:59,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 13:31:59,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:31:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52911317] [2025-03-03 13:31:59,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52911317] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:31:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128935265] [2025-03-03 13:31:59,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:31:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:31:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:31:59,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:31:59,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:31:59,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 50 statements into 5 equivalence classes. [2025-03-03 13:31:59,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 50 statements. [2025-03-03 13:31:59,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-03 13:31:59,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:31:59,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 13:31:59,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:31:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-03 13:31:59,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:31:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 13:31:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128935265] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:31:59,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:31:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-03-03 13:31:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193700913] [2025-03-03 13:31:59,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:31:59,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 13:31:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:31:59,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 13:31:59,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:31:59,749 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:32:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:00,169 INFO L93 Difference]: Finished difference Result 205 states and 251 transitions. [2025-03-03 13:32:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 13:32:00,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2025-03-03 13:32:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:00,171 INFO L225 Difference]: With dead ends: 205 [2025-03-03 13:32:00,171 INFO L226 Difference]: Without dead ends: 141 [2025-03-03 13:32:00,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:32:00,172 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:00,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 163 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:32:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-03 13:32:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 89. [2025-03-03 13:32:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 73 states have internal predecessors, (78), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-03 13:32:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2025-03-03 13:32:00,189 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 50 [2025-03-03 13:32:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:00,189 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2025-03-03 13:32:00,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:32:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2025-03-03 13:32:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-03 13:32:00,190 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:00,190 INFO L218 NwaCegarLoop]: trace histogram [12, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-03 13:32:00,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 13:32:00,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:00,391 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:00,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:00,391 INFO L85 PathProgramCache]: Analyzing trace with hash -402656257, now seen corresponding path program 4 times [2025-03-03 13:32:00,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:00,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962009944] [2025-03-03 13:32:00,391 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:32:00,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:00,398 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:32:00,414 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:32:00,415 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:32:00,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 13:32:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962009944] [2025-03-03 13:32:00,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962009944] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121463183] [2025-03-03 13:32:00,683 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:32:00,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:00,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:32:00,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:32:00,713 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 57 statements into 2 equivalence classes. [2025-03-03 13:32:00,758 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 57 of 57 statements. [2025-03-03 13:32:00,758 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:32:00,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:00,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 13:32:00,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:32:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-03 13:32:00,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:32:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 13:32:01,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121463183] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:32:01,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:32:01,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2025-03-03 13:32:01,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261243790] [2025-03-03 13:32:01,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:32:01,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 13:32:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:32:01,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 13:32:01,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2025-03-03 13:32:01,113 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:32:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:32:06,474 INFO L93 Difference]: Finished difference Result 338 states and 437 transitions. [2025-03-03 13:32:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 13:32:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2025-03-03 13:32:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:32:06,475 INFO L225 Difference]: With dead ends: 338 [2025-03-03 13:32:06,475 INFO L226 Difference]: Without dead ends: 264 [2025-03-03 13:32:06,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 13:32:06,477 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 491 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:32:06,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 475 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:32:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2025-03-03 13:32:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 138. [2025-03-03 13:32:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 114 states have (on average 1.0526315789473684) internal successors, (120), 115 states have internal predecessors, (120), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-03 13:32:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2025-03-03 13:32:06,507 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 57 [2025-03-03 13:32:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:32:06,508 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2025-03-03 13:32:06,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:32:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2025-03-03 13:32:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-03 13:32:06,508 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:32:06,508 INFO L218 NwaCegarLoop]: trace histogram [26, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-03 13:32:06,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:32:06,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:06,709 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:32:06,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:32:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2084030881, now seen corresponding path program 5 times [2025-03-03 13:32:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:32:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026448618] [2025-03-03 13:32:06,709 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:32:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:32:06,724 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 71 statements into 14 equivalence classes. [2025-03-03 13:32:07,077 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 71 of 71 statements. [2025-03-03 13:32:07,077 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-03 13:32:07,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:32:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 8 proven. 351 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-03 13:32:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:32:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026448618] [2025-03-03 13:32:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026448618] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:32:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671508405] [2025-03-03 13:32:07,762 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:32:07,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:32:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:32:07,764 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) [2025-03-03 13:32:07,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:32:07,802 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 71 statements into 14 equivalence classes.