./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:52:36,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:52:36,533 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:52:36,537 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:52:36,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:52:36,554 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:52:36,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:52:36,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:52:36,556 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:52:36,556 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:52:36,556 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:52:36,557 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:52:36,557 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:52:36,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:52:36,557 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:52:36,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:52:36,558 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:36,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:52:36,558 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:52:36,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:52:36,559 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 -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2025-03-03 13:52:36,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:52:36,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:52:36,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:52:36,800 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:52:36,800 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:52:36,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2025-03-03 13:52:37,937 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67ee5c645/8c697a170b364058a69ac70677acadae/FLAG6122e73e5 [2025-03-03 13:52:38,150 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:52:38,151 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2025-03-03 13:52:38,156 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67ee5c645/8c697a170b364058a69ac70677acadae/FLAG6122e73e5 [2025-03-03 13:52:38,166 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67ee5c645/8c697a170b364058a69ac70677acadae [2025-03-03 13:52:38,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:52:38,169 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:52:38,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:38,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:52:38,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:52:38,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e2849d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38, skipping insertion in model container [2025-03-03 13:52:38,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,185 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:52:38,267 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/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2025-03-03 13:52:38,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:38,287 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:52:38,294 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/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2025-03-03 13:52:38,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:52:38,308 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:52:38,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38 WrapperNode [2025-03-03 13:52:38,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:52:38,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:38,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:52:38,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:52:38,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,328 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2025-03-03 13:52:38,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:52:38,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:52:38,328 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:52:38,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:52:38,336 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,340 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,352 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:52:38,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,355 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:52:38,357 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:52:38,360 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:52:38,360 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:52:38,360 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (1/1) ... [2025-03-03 13:52:38,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:38,385 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 13:52:38,391 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 13:52:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:52:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:52:38,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:52:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:52:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:52:38,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:52:38,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:52:38,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:52:38,454 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:52:38,455 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:52:38,588 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-03 13:52:38,588 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:52:38,597 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:52:38,598 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:52:38,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:38 BoogieIcfgContainer [2025-03-03 13:52:38,598 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:52:38,601 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:52:38,601 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:52:38,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:52:38,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:52:38" (1/3) ... [2025-03-03 13:52:38,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2588037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:38, skipping insertion in model container [2025-03-03 13:52:38,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:52:38" (2/3) ... [2025-03-03 13:52:38,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2588037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:52:38, skipping insertion in model container [2025-03-03 13:52:38,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:52:38" (3/3) ... [2025-03-03 13:52:38,606 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2025-03-03 13:52:38,618 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:52:38,619 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound100.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:52:38,662 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:52:38,673 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;@1f4145e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:52:38,674 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:52:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-03 13:52:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:38,682 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:38,682 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:38,683 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:38,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:38,687 INFO L85 PathProgramCache]: Analyzing trace with hash -743363080, now seen corresponding path program 1 times [2025-03-03 13:52:38,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905625926] [2025-03-03 13:52:38,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:38,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:38,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:38,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:38,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:38,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905625926] [2025-03-03 13:52:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905625926] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542578299] [2025-03-03 13:52:38,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:38,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:38,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:38,802 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 13:52:38,803 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 13:52:38,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:38,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:38,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:38,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:38,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 13:52:38,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 13:52:38,871 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542578299] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:38,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:38,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 13:52:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929208541] [2025-03-03 13:52:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:38,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:52:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:38,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:52:38,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:38,888 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:38,899 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2025-03-03 13:52:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:52:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-03 13:52:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:38,905 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:52:38,905 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 13:52:38,907 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:52:38,908 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:38,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 13:52:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 13:52:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-03 13:52:38,937 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2025-03-03 13:52:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:38,937 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-03 13:52:38,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-03 13:52:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-03 13:52:38,938 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:38,938 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:38,944 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 13:52:39,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:52:39,140 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090086, now seen corresponding path program 1 times [2025-03-03 13:52:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703366970] [2025-03-03 13:52:39,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,146 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-03 13:52:39,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-03 13:52:39,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703366970] [2025-03-03 13:52:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703366970] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:39,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 13:52:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779988495] [2025-03-03 13:52:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:39,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:52:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:39,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:52:39,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:39,322 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:39,411 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-03 13:52:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-03 13:52:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:39,412 INFO L225 Difference]: With dead ends: 44 [2025-03-03 13:52:39,412 INFO L226 Difference]: Without dead ends: 37 [2025-03-03 13:52:39,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:39,414 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:39,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-03 13:52:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-03 13:52:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:52:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-03 13:52:39,424 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2025-03-03 13:52:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:39,424 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-03 13:52:39,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-03 13:52:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-03 13:52:39,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:39,426 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:39,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 13:52:39,426 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash -602638456, now seen corresponding path program 1 times [2025-03-03 13:52:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793113562] [2025-03-03 13:52:39,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:39,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:39,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:39,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655282859] [2025-03-03 13:52:39,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:39,461 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 13:52:39,462 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 13:52:39,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-03 13:52:39,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-03 13:52:39,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:39,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:39,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:39,596 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:39,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793113562] [2025-03-03 13:52:39,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655282859] [2025-03-03 13:52:39,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655282859] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:39,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:39,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:39,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850026136] [2025-03-03 13:52:39,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:39,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:39,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:39,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:39,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:39,599 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:39,639 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2025-03-03 13:52:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2025-03-03 13:52:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:39,640 INFO L225 Difference]: With dead ends: 43 [2025-03-03 13:52:39,640 INFO L226 Difference]: Without dead ends: 41 [2025-03-03 13:52:39,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:39,641 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:39,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-03 13:52:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-03 13:52:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-03 13:52:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2025-03-03 13:52:39,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2025-03-03 13:52:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:39,652 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2025-03-03 13:52:39,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2025-03-03 13:52:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 13:52:39,652 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:39,652 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:39,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:52:39,853 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 13:52:39,853 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:39,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1811518815, now seen corresponding path program 1 times [2025-03-03 13:52:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946354231] [2025-03-03 13:52:39,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:39,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:39,885 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:39,885 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:39,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946354231] [2025-03-03 13:52:40,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946354231] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814087013] [2025-03-03 13:52:40,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:40,031 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 13:52:40,033 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 13:52:40,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-03 13:52:40,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 13:52:40,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:52:40,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-03 13:52:40,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814087013] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:40,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:40,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-03 13:52:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740316972] [2025-03-03 13:52:40,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:52:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:52:40,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:52:40,200 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:40,341 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2025-03-03 13:52:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:52:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-03-03 13:52:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:40,342 INFO L225 Difference]: With dead ends: 82 [2025-03-03 13:52:40,342 INFO L226 Difference]: Without dead ends: 75 [2025-03-03 13:52:40,342 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-03 13:52:40,343 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:40,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-03 13:52:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2025-03-03 13:52:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2025-03-03 13:52:40,352 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2025-03-03 13:52:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:40,352 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2025-03-03 13:52:40,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 13:52:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2025-03-03 13:52:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-03 13:52:40,352 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:40,352 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:40,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 13:52:40,555 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 13:52:40,556 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:40,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash 356055075, now seen corresponding path program 1 times [2025-03-03 13:52:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:40,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750932293] [2025-03-03 13:52:40,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:40,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:40,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:40,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:40,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113247129] [2025-03-03 13:52:40,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:40,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:40,579 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 13:52:40,581 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 13:52:40,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-03 13:52:40,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-03 13:52:40,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:40,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:40,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 13:52:40,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:40,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:40,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750932293] [2025-03-03 13:52:40,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113247129] [2025-03-03 13:52:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113247129] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:40,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-03 13:52:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669516188] [2025-03-03 13:52:40,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:40,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:52:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:40,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:52:40,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:40,811 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:40,940 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2025-03-03 13:52:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-03-03 13:52:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:40,941 INFO L225 Difference]: With dead ends: 83 [2025-03-03 13:52:40,942 INFO L226 Difference]: Without dead ends: 81 [2025-03-03 13:52:40,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 13:52:40,943 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:40,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 246 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-03 13:52:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2025-03-03 13:52:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2025-03-03 13:52:40,959 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2025-03-03 13:52:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:40,959 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2025-03-03 13:52:40,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:40,959 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2025-03-03 13:52:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 13:52:40,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:40,959 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:40,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:41,160 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 13:52:41,160 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -737481304, now seen corresponding path program 2 times [2025-03-03 13:52:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775888369] [2025-03-03 13:52:41,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,165 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-03 13:52:41,175 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 13:52:41,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:41,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:41,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775888369] [2025-03-03 13:52:41,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775888369] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:41,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:41,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:41,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424643446] [2025-03-03 13:52:41,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:41,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:41,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:41,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:41,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:41,247 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,321 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2025-03-03 13:52:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:52:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2025-03-03 13:52:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,322 INFO L225 Difference]: With dead ends: 116 [2025-03-03 13:52:41,322 INFO L226 Difference]: Without dead ends: 87 [2025-03-03 13:52:41,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:52:41,323 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-03 13:52:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2025-03-03 13:52:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-03 13:52:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2025-03-03 13:52:41,333 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2025-03-03 13:52:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,333 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2025-03-03 13:52:41,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 13:52:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2025-03-03 13:52:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-03 13:52:41,334 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,334 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:41,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 13:52:41,334 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash 437747302, now seen corresponding path program 1 times [2025-03-03 13:52:41,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155826531] [2025-03-03 13:52:41,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:41,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:41,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:41,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732066435] [2025-03-03 13:52:41,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:41,353 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 13:52:41,355 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 13:52:41,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-03 13:52:41,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-03 13:52:41,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:41,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:52:41,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 13:52:41,531 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:41,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:41,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155826531] [2025-03-03 13:52:41,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:41,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732066435] [2025-03-03 13:52:41,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732066435] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:41,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-03 13:52:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984774480] [2025-03-03 13:52:41,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:41,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:52:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:41,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:52:41,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:52:41,586 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:52:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:41,711 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-03 13:52:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 13:52:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2025-03-03 13:52:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:41,712 INFO L225 Difference]: With dead ends: 79 [2025-03-03 13:52:41,712 INFO L226 Difference]: Without dead ends: 77 [2025-03-03 13:52:41,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:52:41,713 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:41,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:52:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-03 13:52:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2025-03-03 13:52:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-03 13:52:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2025-03-03 13:52:41,731 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2025-03-03 13:52:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:41,731 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2025-03-03 13:52:41,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-03 13:52:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2025-03-03 13:52:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 13:52:41,732 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:41,732 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:41,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:41,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,933 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:41,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1953213885, now seen corresponding path program 1 times [2025-03-03 13:52:41,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:41,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460917507] [2025-03-03 13:52:41,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:41,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:41,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:41,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:41,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:41,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022370043] [2025-03-03 13:52:41,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:41,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:41,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:41,951 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 13:52:41,952 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 13:52:41,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:52:42,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:52:42,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-03 13:52:42,043 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460917507] [2025-03-03 13:52:42,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022370043] [2025-03-03 13:52:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022370043] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:42,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:42,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:42,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035850261] [2025-03-03 13:52:42,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:42,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:42,045 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:42,092 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2025-03-03 13:52:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-03-03 13:52:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:42,095 INFO L225 Difference]: With dead ends: 104 [2025-03-03 13:52:42,095 INFO L226 Difference]: Without dead ends: 102 [2025-03-03 13:52:42,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:42,095 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:42,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-03 13:52:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2025-03-03 13:52:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-03 13:52:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-03 13:52:42,120 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2025-03-03 13:52:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:42,120 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-03 13:52:42,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-03 13:52:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-03 13:52:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:52:42,122 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:42,122 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:42,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:42,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,323 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:42,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -762809663, now seen corresponding path program 1 times [2025-03-03 13:52:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:42,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715829325] [2025-03-03 13:52:42,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:42,327 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:42,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:42,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230579503] [2025-03-03 13:52:42,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,341 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 13:52:42,344 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 13:52:42,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:52:42,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:52:42,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 13:52:42,407 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:52:42,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715829325] [2025-03-03 13:52:42,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230579503] [2025-03-03 13:52:42,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230579503] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:52:42,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:52:42,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:52:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586726708] [2025-03-03 13:52:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:42,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:42,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:42,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:52:42,409 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:52:42,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:42,459 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2025-03-03 13:52:42,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:42,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2025-03-03 13:52:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:42,462 INFO L225 Difference]: With dead ends: 148 [2025-03-03 13:52:42,462 INFO L226 Difference]: Without dead ends: 146 [2025-03-03 13:52:42,463 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:52:42,464 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:42,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-03-03 13:52:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2025-03-03 13:52:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2025-03-03 13:52:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2025-03-03 13:52:42,494 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2025-03-03 13:52:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:42,494 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2025-03-03 13:52:42,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 13:52:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2025-03-03 13:52:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-03 13:52:42,495 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:42,495 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:42,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:52:42,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,700 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:42,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:42,701 INFO L85 PathProgramCache]: Analyzing trace with hash 17136405, now seen corresponding path program 1 times [2025-03-03 13:52:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:42,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186199523] [2025-03-03 13:52:42,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:42,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:42,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:42,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:42,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610670244] [2025-03-03 13:52:42,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:42,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:42,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:42,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:42,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:52:42,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-03 13:52:42,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-03 13:52:42,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:42,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:42,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-03 13:52:42,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-03 13:52:43,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-03 13:52:43,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:43,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186199523] [2025-03-03 13:52:43,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:43,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610670244] [2025-03-03 13:52:43,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610670244] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:43,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:43,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-03 13:52:43,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855163386] [2025-03-03 13:52:43,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:43,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 13:52:43,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:43,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 13:52:43,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-03 13:52:43,574 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:45,499 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2025-03-03 13:52:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-03 13:52:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2025-03-03 13:52:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:45,502 INFO L225 Difference]: With dead ends: 358 [2025-03-03 13:52:45,502 INFO L226 Difference]: Without dead ends: 276 [2025-03-03 13:52:45,504 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:52:45,504 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:45,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-03 13:52:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2025-03-03 13:52:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2025-03-03 13:52:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2025-03-03 13:52:45,577 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2025-03-03 13:52:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:45,577 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2025-03-03 13:52:45,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2025-03-03 13:52:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-03 13:52:45,579 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:45,579 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:45,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:45,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 13:52:45,780 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:45,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1304203768, now seen corresponding path program 1 times [2025-03-03 13:52:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235132463] [2025-03-03 13:52:45,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:45,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:45,794 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:45,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:45,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:45,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426268547] [2025-03-03 13:52:45,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:45,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:45,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:52:45,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 13:52:45,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 13:52:45,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:45,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:45,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-03 13:52:45,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 13:52:46,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-03 13:52:46,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:46,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235132463] [2025-03-03 13:52:46,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:46,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426268547] [2025-03-03 13:52:46,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426268547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:46,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:46,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-03 13:52:46,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513291213] [2025-03-03 13:52:46,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:46,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:46,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:46,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:46,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:46,361 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:47,510 INFO L93 Difference]: Finished difference Result 255 states and 394 transitions. [2025-03-03 13:52:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 59 [2025-03-03 13:52:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:47,512 INFO L225 Difference]: With dead ends: 255 [2025-03-03 13:52:47,512 INFO L226 Difference]: Without dead ends: 253 [2025-03-03 13:52:47,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 13:52:47,513 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:47,513 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:52:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-03-03 13:52:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2025-03-03 13:52:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 112 states have internal predecessors, (136), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:52:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2025-03-03 13:52:47,566 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 59 [2025-03-03 13:52:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:47,567 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2025-03-03 13:52:47,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-03 13:52:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2025-03-03 13:52:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-03 13:52:47,567 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:47,567 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:47,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 13:52:47,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:47,772 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:47,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1091825569, now seen corresponding path program 2 times [2025-03-03 13:52:47,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:47,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354919008] [2025-03-03 13:52:47,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:47,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:47,776 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-03 13:52:47,788 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 13:52:47,789 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:47,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44236849] [2025-03-03 13:52:47,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:47,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:47,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:52:47,816 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-03 13:52:47,834 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 13:52:47,834 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:47,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:47,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-03-03 13:52:47,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-03 13:52:48,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-03-03 13:52:48,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:48,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354919008] [2025-03-03 13:52:48,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:48,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44236849] [2025-03-03 13:52:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44236849] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:48,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:48,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2025-03-03 13:52:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385739632] [2025-03-03 13:52:48,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:48,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 13:52:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:48,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 13:52:48,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:48,801 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-03 13:52:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:52,342 INFO L93 Difference]: Finished difference Result 388 states and 583 transitions. [2025-03-03 13:52:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-03 13:52:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 64 [2025-03-03 13:52:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:52,348 INFO L225 Difference]: With dead ends: 388 [2025-03-03 13:52:52,348 INFO L226 Difference]: Without dead ends: 327 [2025-03-03 13:52:52,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=678, Invalid=2862, Unknown=0, NotChecked=0, Total=3540 [2025-03-03 13:52:52,350 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:52,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 368 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-03-03 13:52:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-03 13:52:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 280. [2025-03-03 13:52:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 139 states have (on average 1.2805755395683454) internal successors, (178), 150 states have internal predecessors, (178), 121 states have call successors, (121), 19 states have call predecessors, (121), 19 states have return successors, (120), 110 states have call predecessors, (120), 120 states have call successors, (120) [2025-03-03 13:52:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 419 transitions. [2025-03-03 13:52:52,462 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 419 transitions. Word has length 64 [2025-03-03 13:52:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:52,462 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 419 transitions. [2025-03-03 13:52:52,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-03 13:52:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 419 transitions. [2025-03-03 13:52:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-03 13:52:52,463 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:52,463 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:52,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:52,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:52:52,664 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:52,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1883736123, now seen corresponding path program 1 times [2025-03-03 13:52:52,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:52,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484809125] [2025-03-03 13:52:52,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:52,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:52,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:52,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:52,683 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:52,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:52,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299413431] [2025-03-03 13:52:52,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:52,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:52,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:52,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:52,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:52:52,710 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-03 13:52:52,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-03 13:52:52,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:52,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:52,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-03 13:52:52,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 13:52:53,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484809125] [2025-03-03 13:52:53,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299413431] [2025-03-03 13:52:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299413431] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:53,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:53,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:52:53,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150549966] [2025-03-03 13:52:53,799 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:53,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:52:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:53,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:52:53,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2025-03-03 13:52:53,800 INFO L87 Difference]: Start difference. First operand 280 states and 419 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:52:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:54,582 INFO L93 Difference]: Finished difference Result 357 states and 538 transitions. [2025-03-03 13:52:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 13:52:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2025-03-03 13:52:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:54,585 INFO L225 Difference]: With dead ends: 357 [2025-03-03 13:52:54,585 INFO L226 Difference]: Without dead ends: 350 [2025-03-03 13:52:54,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 13:52:54,586 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:54,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 431 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:52:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-03 13:52:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2025-03-03 13:52:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 163 states have (on average 1.294478527607362) internal successors, (211), 177 states have internal predecessors, (211), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 143 states have call predecessors, (156), 156 states have call successors, (156) [2025-03-03 13:52:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2025-03-03 13:52:54,726 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 79 [2025-03-03 13:52:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:54,726 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2025-03-03 13:52:54,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-03 13:52:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2025-03-03 13:52:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 13:52:54,727 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:54,727 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:54,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 13:52:54,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:52:54,928 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:54,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1658792811, now seen corresponding path program 2 times [2025-03-03 13:52:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:54,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370634858] [2025-03-03 13:52:54,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:54,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:54,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 13:52:54,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:54,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:54,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:55,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:55,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370634858] [2025-03-03 13:52:55,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370634858] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:55,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621009524] [2025-03-03 13:52:55,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:55,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:55,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:55,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:52:55,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 13:52:55,120 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 13:52:55,120 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:55,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:55,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:52:55,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:55,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-03 13:52:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621009524] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:55,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:52:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-03-03 13:52:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425579214] [2025-03-03 13:52:55,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:55,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 13:52:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:55,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 13:52:55,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:52:55,262 INFO L87 Difference]: Start difference. First operand 343 states and 524 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 13:52:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:55,712 INFO L93 Difference]: Finished difference Result 580 states and 882 transitions. [2025-03-03 13:52:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 13:52:55,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2025-03-03 13:52:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:55,715 INFO L225 Difference]: With dead ends: 580 [2025-03-03 13:52:55,715 INFO L226 Difference]: Without dead ends: 357 [2025-03-03 13:52:55,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:52:55,716 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:55,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 331 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:52:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-03 13:52:55,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 262. [2025-03-03 13:52:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 139 states have internal predecessors, (173), 103 states have call successors, (103), 21 states have call predecessors, (103), 21 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-03 13:52:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 378 transitions. [2025-03-03 13:52:55,806 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 378 transitions. Word has length 84 [2025-03-03 13:52:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:55,806 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 378 transitions. [2025-03-03 13:52:55,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-03 13:52:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 378 transitions. [2025-03-03 13:52:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 13:52:55,807 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:55,807 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:55,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 13:52:56,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:52:56,008 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:56,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 996745083, now seen corresponding path program 1 times [2025-03-03 13:52:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:56,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419492906] [2025-03-03 13:52:56,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:56,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 13:52:56,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:52:56,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:56,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:56,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091651794] [2025-03-03 13:52:56,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:52:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:56,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:56,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:52:56,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 13:52:56,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 13:52:56,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:52:56,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:56,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:52:56,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-03-03 13:52:56,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-03 13:52:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:56,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419492906] [2025-03-03 13:52:56,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:56,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091651794] [2025-03-03 13:52:56,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091651794] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 13:52:56,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:52:56,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-03 13:52:56,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433274914] [2025-03-03 13:52:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:52:56,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:52:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:56,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:52:56,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:52:56,199 INFO L87 Difference]: Start difference. First operand 262 states and 378 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-03 13:52:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:52:56,344 INFO L93 Difference]: Finished difference Result 272 states and 386 transitions. [2025-03-03 13:52:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:52:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2025-03-03 13:52:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:52:56,347 INFO L225 Difference]: With dead ends: 272 [2025-03-03 13:52:56,347 INFO L226 Difference]: Without dead ends: 270 [2025-03-03 13:52:56,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:52:56,347 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:52:56,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:52:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-03 13:52:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2025-03-03 13:52:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 145 states have internal predecessors, (179), 103 states have call successors, (103), 23 states have call predecessors, (103), 23 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-03 13:52:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 384 transitions. [2025-03-03 13:52:56,453 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 384 transitions. Word has length 92 [2025-03-03 13:52:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:52:56,453 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 384 transitions. [2025-03-03 13:52:56,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-03 13:52:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 384 transitions. [2025-03-03 13:52:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 13:52:56,454 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:52:56,454 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:52:56,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 13:52:56,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 13:52:56,655 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:52:56,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:52:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1015960117, now seen corresponding path program 2 times [2025-03-03 13:52:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:52:56,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381160106] [2025-03-03 13:52:56,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:52:56,659 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:56,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:56,667 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:56,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:52:56,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291161765] [2025-03-03 13:52:56,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:52:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:52:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:52:56,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:52:56,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:52:56,701 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-03 13:52:56,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 13:52:56,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:52:56,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:52:56,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:52:56,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:52:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:52:57,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:52:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:52:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:52:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381160106] [2025-03-03 13:52:57,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:52:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291161765] [2025-03-03 13:52:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291161765] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:52:57,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:52:57,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2025-03-03 13:52:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666649083] [2025-03-03 13:52:57,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:52:57,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:52:57,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:52:57,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:52:57,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:52:57,547 INFO L87 Difference]: Start difference. First operand 270 states and 384 transitions. Second operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 13:53:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:01,738 INFO L93 Difference]: Finished difference Result 459 states and 701 transitions. [2025-03-03 13:53:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-03 13:53:01,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 97 [2025-03-03 13:53:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:01,741 INFO L225 Difference]: With dead ends: 459 [2025-03-03 13:53:01,741 INFO L226 Difference]: Without dead ends: 451 [2025-03-03 13:53:01,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2025-03-03 13:53:01,743 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 130 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:01,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 779 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 13:53:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2025-03-03 13:53:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 313. [2025-03-03 13:53:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 157 states have (on average 1.286624203821656) internal successors, (202), 159 states have internal predecessors, (202), 131 states have call successors, (131), 24 states have call predecessors, (131), 24 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2025-03-03 13:53:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 463 transitions. [2025-03-03 13:53:01,877 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 463 transitions. Word has length 97 [2025-03-03 13:53:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:01,877 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 463 transitions. [2025-03-03 13:53:01,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 13:53:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 463 transitions. [2025-03-03 13:53:01,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-03 13:53:01,878 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:01,878 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:01,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 13:53:02,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:02,079 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:02,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1295956566, now seen corresponding path program 3 times [2025-03-03 13:53:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:02,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191580795] [2025-03-03 13:53:02,079 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:02,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:02,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-03 13:53:02,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 99 of 99 statements. [2025-03-03 13:53:02,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-03 13:53:02,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404852644] [2025-03-03 13:53:02,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:02,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:02,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:02,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:02,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:53:02,129 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-03 13:53:02,166 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 63 of 99 statements. [2025-03-03 13:53:02,166 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-03 13:53:02,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:02,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-03 13:53:02,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 80 proven. 29 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-03-03 13:53:03,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191580795] [2025-03-03 13:53:03,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404852644] [2025-03-03 13:53:03,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404852644] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:03,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:03,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-03 13:53:03,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472919773] [2025-03-03 13:53:03,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:03,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 13:53:03,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:03,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 13:53:03,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:53:03,587 INFO L87 Difference]: Start difference. First operand 313 states and 463 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 13:53:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:04,276 INFO L93 Difference]: Finished difference Result 391 states and 569 transitions. [2025-03-03 13:53:04,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:53:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2025-03-03 13:53:04,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:04,279 INFO L225 Difference]: With dead ends: 391 [2025-03-03 13:53:04,279 INFO L226 Difference]: Without dead ends: 384 [2025-03-03 13:53:04,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:53:04,279 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:04,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 251 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 13:53:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2025-03-03 13:53:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 374. [2025-03-03 13:53:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 191 states have internal predecessors, (243), 155 states have call successors, (155), 29 states have call predecessors, (155), 29 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2025-03-03 13:53:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 552 transitions. [2025-03-03 13:53:04,433 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 552 transitions. Word has length 99 [2025-03-03 13:53:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:04,433 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 552 transitions. [2025-03-03 13:53:04,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 13:53:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 552 transitions. [2025-03-03 13:53:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 13:53:04,434 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:04,434 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:04,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 13:53:04,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 13:53:04,637 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:04,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1346848239, now seen corresponding path program 4 times [2025-03-03 13:53:04,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:04,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517329911] [2025-03-03 13:53:04,637 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:04,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:04,645 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 13:53:04,670 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:04,670 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:53:04,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:04,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192595905] [2025-03-03 13:53:04,671 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:04,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:04,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:04,677 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:04,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:53:04,717 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-03 13:53:04,741 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 97 of 102 statements. [2025-03-03 13:53:04,742 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 13:53:04,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:04,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-03 13:53:04,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-03 13:53:05,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-03 13:53:06,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:06,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517329911] [2025-03-03 13:53:06,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:06,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192595905] [2025-03-03 13:53:06,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192595905] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:06,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:06,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2025-03-03 13:53:06,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521436485] [2025-03-03 13:53:06,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:06,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-03 13:53:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:06,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-03 13:53:06,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 13:53:06,028 INFO L87 Difference]: Start difference. First operand 374 states and 552 transitions. Second operand has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-03 13:53:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:15,215 INFO L93 Difference]: Finished difference Result 619 states and 956 transitions. [2025-03-03 13:53:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2025-03-03 13:53:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 102 [2025-03-03 13:53:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:15,218 INFO L225 Difference]: With dead ends: 619 [2025-03-03 13:53:15,218 INFO L226 Difference]: Without dead ends: 611 [2025-03-03 13:53:15,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4040 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2038, Invalid=11534, Unknown=0, NotChecked=0, Total=13572 [2025-03-03 13:53:15,221 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 286 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:15,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 611 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-03-03 13:53:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2025-03-03 13:53:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 471. [2025-03-03 13:53:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 235 states have (on average 1.297872340425532) internal successors, (305), 237 states have internal predecessors, (305), 203 states have call successors, (203), 32 states have call predecessors, (203), 32 states have return successors, (202), 201 states have call predecessors, (202), 202 states have call successors, (202) [2025-03-03 13:53:15,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 710 transitions. [2025-03-03 13:53:15,505 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 710 transitions. Word has length 102 [2025-03-03 13:53:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:15,506 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 710 transitions. [2025-03-03 13:53:15,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-03 13:53:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 710 transitions. [2025-03-03 13:53:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 13:53:15,508 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:15,509 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:15,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:15,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 13:53:15,709 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:15,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1473706161, now seen corresponding path program 5 times [2025-03-03 13:53:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:15,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011673396] [2025-03-03 13:53:15,710 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:53:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:15,714 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-03 13:53:15,732 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:15,732 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:53:15,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:15,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171875756] [2025-03-03 13:53:15,737 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:53:15,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:15,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:15,740 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:15,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 13:53:15,764 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-03 13:53:15,826 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 13:53:15,826 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-03 13:53:15,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:15,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-03 13:53:15,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 43 proven. 67 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2025-03-03 13:53:17,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011673396] [2025-03-03 13:53:19,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171875756] [2025-03-03 13:53:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171875756] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:19,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-03 13:53:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029083252] [2025-03-03 13:53:19,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:19,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 13:53:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:19,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 13:53:19,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2025-03-03 13:53:19,686 INFO L87 Difference]: Start difference. First operand 471 states and 710 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:21,230 INFO L93 Difference]: Finished difference Result 551 states and 823 transitions. [2025-03-03 13:53:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 13:53:21,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 102 [2025-03-03 13:53:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:21,234 INFO L225 Difference]: With dead ends: 551 [2025-03-03 13:53:21,234 INFO L226 Difference]: Without dead ends: 544 [2025-03-03 13:53:21,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 13:53:21,235 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 56 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:21,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 565 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 13:53:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2025-03-03 13:53:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 529. [2025-03-03 13:53:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 263 states have internal predecessors, (340), 231 states have call successors, (231), 36 states have call predecessors, (231), 36 states have return successors, (230), 229 states have call predecessors, (230), 230 states have call successors, (230) [2025-03-03 13:53:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 801 transitions. [2025-03-03 13:53:21,612 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 801 transitions. Word has length 102 [2025-03-03 13:53:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:21,612 INFO L471 AbstractCegarLoop]: Abstraction has 529 states and 801 transitions. [2025-03-03 13:53:21,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-03 13:53:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 801 transitions. [2025-03-03 13:53:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-03 13:53:21,614 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:21,614 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:21,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 13:53:21,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:21,815 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:21,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -721263382, now seen corresponding path program 6 times [2025-03-03 13:53:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32034030] [2025-03-03 13:53:21,815 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:53:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:21,822 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-03 13:53:21,846 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 105 of 105 statements. [2025-03-03 13:53:21,850 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 13:53:21,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:21,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425280775] [2025-03-03 13:53:21,851 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:53:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:21,854 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:21,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 13:53:21,881 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-03 13:53:22,045 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 87 of 105 statements. [2025-03-03 13:53:22,045 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-03 13:53:22,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:22,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-03 13:53:22,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 42 proven. 77 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2025-03-03 13:53:23,338 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:24,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32034030] [2025-03-03 13:53:24,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:24,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425280775] [2025-03-03 13:53:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425280775] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:24,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:24,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-03-03 13:53:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526777248] [2025-03-03 13:53:24,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:24,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 13:53:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:24,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 13:53:24,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2025-03-03 13:53:24,332 INFO L87 Difference]: Start difference. First operand 529 states and 801 transitions. Second operand has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:53:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:32,794 INFO L93 Difference]: Finished difference Result 717 states and 1096 transitions. [2025-03-03 13:53:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 13:53:32,794 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 105 [2025-03-03 13:53:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:32,798 INFO L225 Difference]: With dead ends: 717 [2025-03-03 13:53:32,798 INFO L226 Difference]: Without dead ends: 714 [2025-03-03 13:53:32,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2025-03-03 13:53:32,799 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 88 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:32,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 576 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2025-03-03 13:53:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2025-03-03 13:53:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 656. [2025-03-03 13:53:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 320 states have (on average 1.30625) internal successors, (418), 324 states have internal predecessors, (418), 291 states have call successors, (291), 44 states have call predecessors, (291), 44 states have return successors, (290), 287 states have call predecessors, (290), 290 states have call successors, (290) [2025-03-03 13:53:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 999 transitions. [2025-03-03 13:53:33,226 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 999 transitions. Word has length 105 [2025-03-03 13:53:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:33,226 INFO L471 AbstractCegarLoop]: Abstraction has 656 states and 999 transitions. [2025-03-03 13:53:33,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-03 13:53:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 999 transitions. [2025-03-03 13:53:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-03 13:53:33,227 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:33,228 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:33,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 13:53:33,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:33,428 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:33,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1862646870, now seen corresponding path program 2 times [2025-03-03 13:53:33,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:33,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993030512] [2025-03-03 13:53:33,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:33,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:53:33,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:53:33,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:33,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:33,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789383071] [2025-03-03 13:53:33,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:33,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:33,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:33,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:33,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 13:53:33,479 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-03 13:53:33,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-03 13:53:33,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:33,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:33,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-03 13:53:33,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2025-03-03 13:53:34,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-03 13:53:35,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:35,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993030512] [2025-03-03 13:53:35,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789383071] [2025-03-03 13:53:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789383071] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:35,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:35,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2025-03-03 13:53:35,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619004807] [2025-03-03 13:53:35,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:35,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-03 13:53:35,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:35,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-03 13:53:35,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 13:53:35,134 INFO L87 Difference]: Start difference. First operand 656 states and 999 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-03 13:53:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:59,026 INFO L93 Difference]: Finished difference Result 1028 states and 1605 transitions. [2025-03-03 13:53:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2025-03-03 13:53:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 108 [2025-03-03 13:53:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:59,031 INFO L225 Difference]: With dead ends: 1028 [2025-03-03 13:53:59,031 INFO L226 Difference]: Without dead ends: 1026 [2025-03-03 13:53:59,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=2276, Invalid=9066, Unknown=0, NotChecked=0, Total=11342 [2025-03-03 13:53:59,033 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 218 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:59,034 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 773 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2025-03-03 13:53:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2025-03-03 13:53:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 878. [2025-03-03 13:53:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 422 states have (on average 1.3317535545023698) internal successors, (562), 427 states have internal predecessors, (562), 405 states have call successors, (405), 50 states have call predecessors, (405), 50 states have return successors, (404), 400 states have call predecessors, (404), 404 states have call successors, (404) [2025-03-03 13:53:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1371 transitions. [2025-03-03 13:53:59,846 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1371 transitions. Word has length 108 [2025-03-03 13:53:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:59,846 INFO L471 AbstractCegarLoop]: Abstraction has 878 states and 1371 transitions. [2025-03-03 13:53:59,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-03 13:53:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1371 transitions. [2025-03-03 13:53:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-03 13:53:59,848 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:59,848 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:59,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 13:54:00,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:00,049 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:54:00,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:54:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1816468747, now seen corresponding path program 7 times [2025-03-03 13:54:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:54:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141238128] [2025-03-03 13:54:00,050 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:54:00,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:54:00,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 13:54:00,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 13:54:00,058 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:54:00,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-03 13:54:00,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:54:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141238128] [2025-03-03 13:54:00,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141238128] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:54:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239661609] [2025-03-03 13:54:00,153 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 13:54:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:54:00,160 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:54:00,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 13:54:00,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-03 13:54:00,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-03 13:54:00,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:54:00,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:00,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 13:54:00,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:54:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 236 proven. 15 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-03-03 13:54:00,276 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:54:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-03 13:54:00,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239661609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:54:00,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:54:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-03 13:54:00,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646355943] [2025-03-03 13:54:00,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:54:00,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 13:54:00,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:54:00,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 13:54:00,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-03 13:54:00,376 INFO L87 Difference]: Start difference. First operand 878 states and 1371 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-03 13:54:01,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:54:01,517 INFO L93 Difference]: Finished difference Result 1512 states and 2379 transitions. [2025-03-03 13:54:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 13:54:01,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 120 [2025-03-03 13:54:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:54:01,524 INFO L225 Difference]: With dead ends: 1512 [2025-03-03 13:54:01,524 INFO L226 Difference]: Without dead ends: 1029 [2025-03-03 13:54:01,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:54:01,527 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:54:01,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 238 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:54:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2025-03-03 13:54:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 968. [2025-03-03 13:54:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 455 states have (on average 1.3362637362637362) internal successors, (608), 473 states have internal predecessors, (608), 462 states have call successors, (462), 50 states have call predecessors, (462), 50 states have return successors, (461), 444 states have call predecessors, (461), 461 states have call successors, (461) [2025-03-03 13:54:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1531 transitions. [2025-03-03 13:54:02,520 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1531 transitions. Word has length 120 [2025-03-03 13:54:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:54:02,521 INFO L471 AbstractCegarLoop]: Abstraction has 968 states and 1531 transitions. [2025-03-03 13:54:02,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-03 13:54:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1531 transitions. [2025-03-03 13:54:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-03 13:54:02,523 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:54:02,523 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:54:02,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 13:54:02,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 13:54:02,723 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:54:02,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:54:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1388475109, now seen corresponding path program 8 times [2025-03-03 13:54:02,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:54:02,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514511083] [2025-03-03 13:54:02,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:54:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:54:02,728 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-03 13:54:02,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-03 13:54:02,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:54:02,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:54:02,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909969034] [2025-03-03 13:54:02,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:54:02,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:02,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:54:02,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:54:02,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 13:54:02,767 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-03 13:54:02,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-03 13:54:02,798 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:54:02,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:02,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-03 13:54:02,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:54:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2025-03-03 13:54:03,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:54:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 34 proven. 80 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-03-03 13:54:04,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:54:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514511083] [2025-03-03 13:54:04,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:54:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909969034] [2025-03-03 13:54:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909969034] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:54:04,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:54:04,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2025-03-03 13:54:04,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123093932] [2025-03-03 13:54:04,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:54:04,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-03 13:54:04,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:54:04,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-03 13:54:04,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 13:54:04,383 INFO L87 Difference]: Start difference. First operand 968 states and 1531 transitions. Second operand has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38)