./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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_unwindbound100.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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:01:24,812 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:01:24,868 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:01:24,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:01:24,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:01:24,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:01:24,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:01:24,887 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:01:24,888 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:01:24,888 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:01:24,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:01:24,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:01:24,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:01:24,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:01:24,889 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:01:24,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:01:24,890 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:01:24,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:01:24,891 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:01:24,891 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:01:24,891 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 -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2025-03-08 05:01:25,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:01:25,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:01:25,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:01:25,136 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:01:25,136 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:01:25,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2025-03-08 05:01:26,444 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c36fee19/45c97564a41f4c27910d6a749809dcaf/FLAG8111be357 [2025-03-08 05:01:26,713 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:01:26,714 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2025-03-08 05:01:26,723 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c36fee19/45c97564a41f4c27910d6a749809dcaf/FLAG8111be357 [2025-03-08 05:01:27,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c36fee19/45c97564a41f4c27910d6a749809dcaf [2025-03-08 05:01:27,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:01:27,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:01:27,023 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:01:27,023 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:01:27,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:01:27,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9bd829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27, skipping insertion in model container [2025-03-08 05:01:27,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,040 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:01:27,147 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_unwindbound100.c[490,503] [2025-03-08 05:01:27,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:01:27,173 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:01:27,180 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_unwindbound100.c[490,503] [2025-03-08 05:01:27,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:01:27,197 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:01:27,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27 WrapperNode [2025-03-08 05:01:27,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:01:27,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:01:27,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:01:27,200 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:01:27,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,218 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2025-03-08 05:01:27,218 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:01:27,219 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:01:27,219 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:01:27,219 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:01:27,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,226 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,233 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]. [2025-03-08 05:01:27,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,235 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,237 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:01:27,240 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:01:27,240 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:01:27,240 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:01:27,240 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (1/1) ... [2025-03-08 05:01:27,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:01:27,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:27,264 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) [2025-03-08 05:01:27,267 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 [2025-03-08 05:01:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:01:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 05:01:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 05:01:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:01:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:01:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:01:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 05:01:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 05:01:27,323 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:01:27,324 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:01:27,526 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-08 05:01:27,526 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:01:27,537 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:01:27,538 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:01:27,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:01:27 BoogieIcfgContainer [2025-03-08 05:01:27,538 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:01:27,540 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:01:27,540 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:01:27,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:01:27,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:01:27" (1/3) ... [2025-03-08 05:01:27,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca3b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:01:27, skipping insertion in model container [2025-03-08 05:01:27,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:01:27" (2/3) ... [2025-03-08 05:01:27,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca3b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:01:27, skipping insertion in model container [2025-03-08 05:01:27,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:01:27" (3/3) ... [2025-03-08 05:01:27,547 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2025-03-08 05:01:27,564 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:01:27,566 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_unwindbound100.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 05:01:27,626 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:01:27,653 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;@5303891f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:01:27,653 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:01:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:01:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 05:01:27,667 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:27,669 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:27,669 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:27,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1333316680, now seen corresponding path program 1 times [2025-03-08 05:01:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:27,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832210231] [2025-03-08 05:01:27,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:27,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 05:01:27,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 05:01:27,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:27,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:01:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832210231] [2025-03-08 05:01:27,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832210231] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224711154] [2025-03-08 05:01:27,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:27,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:27,811 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) [2025-03-08 05:01:27,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:01:27,846 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 05:01:27,863 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 05:01:27,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:27,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:27,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 05:01:27,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:01:27,874 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:01:27,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224711154] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:27,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:01:27,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 05:01:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414618100] [2025-03-08 05:01:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:27,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 05:01:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:27,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 05:01:27,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:01:27,892 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:01:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:27,904 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2025-03-08 05:01:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 05:01:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-08 05:01:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:27,910 INFO L225 Difference]: With dead ends: 67 [2025-03-08 05:01:27,910 INFO L226 Difference]: Without dead ends: 31 [2025-03-08 05:01:27,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:01:27,915 INFO L435 NwaCegarLoop]: 45 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, 45 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 [2025-03-08 05:01:27,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-08 05:01:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-03-08 05:01:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:01:27,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2025-03-08 05:01:27,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2025-03-08 05:01:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:27,949 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2025-03-08 05:01:27,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:01:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2025-03-08 05:01:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 05:01:27,950 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:27,950 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:27,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:01:28,151 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 [2025-03-08 05:01:28,151 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:28,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:28,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1413187582, now seen corresponding path program 1 times [2025-03-08 05:01:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:28,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670394024] [2025-03-08 05:01:28,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:28,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 05:01:28,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 05:01:28,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:28,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:28,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:28,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670394024] [2025-03-08 05:01:28,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670394024] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:28,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:28,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 05:01:28,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498283597] [2025-03-08 05:01:28,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:28,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 05:01:28,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:28,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 05:01:28,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 05:01:28,257 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:28,281 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2025-03-08 05:01:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 05:01:28,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-03-08 05:01:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:28,283 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:01:28,283 INFO L226 Difference]: Without dead ends: 33 [2025-03-08 05:01:28,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 05:01:28,284 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:28,284 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-08 05:01:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2025-03-08 05:01:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:01:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2025-03-08 05:01:28,292 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2025-03-08 05:01:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:28,292 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2025-03-08 05:01:28,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2025-03-08 05:01:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-08 05:01:28,293 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:28,293 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:28,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:01:28,293 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:28,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash -908950636, now seen corresponding path program 1 times [2025-03-08 05:01:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:28,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947882478] [2025-03-08 05:01:28,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:28,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:28,305 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-08 05:01:28,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-08 05:01:28,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:28,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:01:28,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:28,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947882478] [2025-03-08 05:01:28,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947882478] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:28,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:28,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 05:01:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135038478] [2025-03-08 05:01:28,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:28,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 05:01:28,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:28,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 05:01:28,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:28,456 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:28,547 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2025-03-08 05:01:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:01:28,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2025-03-08 05:01:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:28,548 INFO L225 Difference]: With dead ends: 53 [2025-03-08 05:01:28,548 INFO L226 Difference]: Without dead ends: 46 [2025-03-08 05:01:28,548 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 [2025-03-08 05:01:28,549 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:28,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-08 05:01:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2025-03-08 05:01:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-08 05:01:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2025-03-08 05:01:28,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2025-03-08 05:01:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:28,555 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2025-03-08 05:01:28,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2025-03-08 05:01:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 05:01:28,559 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:28,559 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:28,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 05:01:28,560 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:28,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash 41792401, now seen corresponding path program 1 times [2025-03-08 05:01:28,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:28,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417876144] [2025-03-08 05:01:28,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:28,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 05:01:28,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 05:01:28,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:28,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:28,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451979932] [2025-03-08 05:01:28,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:28,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:28,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:28,586 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) [2025-03-08 05:01:28,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:01:28,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 05:01:28,623 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 05:01:28,623 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:28,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:28,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:01:28,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:28,728 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:01:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:28,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417876144] [2025-03-08 05:01:28,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:28,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451979932] [2025-03-08 05:01:28,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451979932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:28,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:28,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181573526] [2025-03-08 05:01:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:28,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:28,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:28,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:28,730 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:28,761 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2025-03-08 05:01:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:28,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2025-03-08 05:01:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:28,762 INFO L225 Difference]: With dead ends: 52 [2025-03-08 05:01:28,762 INFO L226 Difference]: Without dead ends: 50 [2025-03-08 05:01:28,763 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:28,763 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 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 [2025-03-08 05:01:28,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:28,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-08 05:01:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2025-03-08 05:01:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 05:01:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2025-03-08 05:01:28,772 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 25 [2025-03-08 05:01:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:28,772 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2025-03-08 05:01:28,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2025-03-08 05:01:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 05:01:28,773 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:28,773 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:28,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:01:28,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 05:01:28,973 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:28,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:28,974 INFO L85 PathProgramCache]: Analyzing trace with hash 55469992, now seen corresponding path program 1 times [2025-03-08 05:01:28,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907400115] [2025-03-08 05:01:28,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:28,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:28,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 05:01:28,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 05:01:28,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:28,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:29,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907400115] [2025-03-08 05:01:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907400115] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:29,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:29,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688059542] [2025-03-08 05:01:29,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:29,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:29,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:29,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:29,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:29,035 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:29,061 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2025-03-08 05:01:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:29,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2025-03-08 05:01:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:29,063 INFO L225 Difference]: With dead ends: 73 [2025-03-08 05:01:29,063 INFO L226 Difference]: Without dead ends: 51 [2025-03-08 05:01:29,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:29,064 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:29,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-03-08 05:01:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-03-08 05:01:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-08 05:01:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2025-03-08 05:01:29,070 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2025-03-08 05:01:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:29,071 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2025-03-08 05:01:29,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2025-03-08 05:01:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 05:01:29,071 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:29,072 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:29,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 05:01:29,072 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:29,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 535252708, now seen corresponding path program 1 times [2025-03-08 05:01:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:29,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564331231] [2025-03-08 05:01:29,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:29,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:29,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:01:29,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:01:29,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:29,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564331231] [2025-03-08 05:01:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564331231] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967537682] [2025-03-08 05:01:29,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:29,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:29,164 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) [2025-03-08 05:01:29,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:01:29,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:01:29,201 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:01:29,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:29,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:29,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:01:29,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:29,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:29,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967537682] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:29,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:01:29,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-08 05:01:29,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147526977] [2025-03-08 05:01:29,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:29,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:01:29,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:29,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:01:29,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:01:29,292 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:01:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:29,426 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2025-03-08 05:01:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:01:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2025-03-08 05:01:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:29,427 INFO L225 Difference]: With dead ends: 147 [2025-03-08 05:01:29,428 INFO L226 Difference]: Without dead ends: 140 [2025-03-08 05:01:29,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:01:29,428 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:29,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-08 05:01:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2025-03-08 05:01:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2025-03-08 05:01:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2025-03-08 05:01:29,445 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2025-03-08 05:01:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:29,445 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2025-03-08 05:01:29,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:01:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2025-03-08 05:01:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-08 05:01:29,448 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:29,448 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:29,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:29,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:29,649 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:29,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -636843790, now seen corresponding path program 1 times [2025-03-08 05:01:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:29,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590941545] [2025-03-08 05:01:29,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:29,653 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 05:01:29,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 05:01:29,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:29,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:01:29,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:29,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590941545] [2025-03-08 05:01:29,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590941545] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:29,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950343279] [2025-03-08 05:01:29,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:29,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:29,733 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) [2025-03-08 05:01:29,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:01:29,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 05:01:29,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 05:01:29,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:29,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:29,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:01:29,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:01:29,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:01:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950343279] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:29,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:01:29,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-08 05:01:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974071621] [2025-03-08 05:01:29,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:29,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:01:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:29,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:01:29,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:01:29,861 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:01:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:30,036 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2025-03-08 05:01:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:01:30,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-03-08 05:01:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:30,038 INFO L225 Difference]: With dead ends: 183 [2025-03-08 05:01:30,040 INFO L226 Difference]: Without dead ends: 171 [2025-03-08 05:01:30,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:01:30,040 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:30,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 293 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-08 05:01:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2025-03-08 05:01:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-08 05:01:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2025-03-08 05:01:30,058 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2025-03-08 05:01:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:30,059 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2025-03-08 05:01:30,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:01:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2025-03-08 05:01:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 05:01:30,059 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:30,059 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 05:01:30,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:30,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:30,264 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:30,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1382279618, now seen corresponding path program 1 times [2025-03-08 05:01:30,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:30,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599426250] [2025-03-08 05:01:30,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:30,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 05:01:30,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 05:01:30,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:30,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77785995] [2025-03-08 05:01:30,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:30,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:30,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:30,280 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) [2025-03-08 05:01:30,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:01:30,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 05:01:30,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 05:01:30,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:30,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:30,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:01:30,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:30,396 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:01:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599426250] [2025-03-08 05:01:30,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77785995] [2025-03-08 05:01:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77785995] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:30,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:30,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447649659] [2025-03-08 05:01:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:30,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:30,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:30,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:30,398 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:01:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:30,438 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2025-03-08 05:01:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2025-03-08 05:01:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:30,440 INFO L225 Difference]: With dead ends: 143 [2025-03-08 05:01:30,440 INFO L226 Difference]: Without dead ends: 141 [2025-03-08 05:01:30,441 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 [2025-03-08 05:01:30,441 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 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 [2025-03-08 05:01:30,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2025-03-08 05:01:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2025-03-08 05:01:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-08 05:01:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2025-03-08 05:01:30,457 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2025-03-08 05:01:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:30,457 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2025-03-08 05:01:30,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:01:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2025-03-08 05:01:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 05:01:30,462 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:30,462 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:30,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:30,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:30,666 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:30,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:30,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2112379123, now seen corresponding path program 1 times [2025-03-08 05:01:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334291782] [2025-03-08 05:01:30,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:30,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:01:30,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:01:30,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:30,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163267606] [2025-03-08 05:01:30,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:30,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:30,678 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) [2025-03-08 05:01:30,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:01:30,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:01:30,710 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:01:30,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:30,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:30,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 05:01:30,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:30,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:30,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334291782] [2025-03-08 05:01:30,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163267606] [2025-03-08 05:01:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163267606] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:30,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:01:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-08 05:01:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883245776] [2025-03-08 05:01:30,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:30,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:01:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:30,929 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:01:30,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:01:30,929 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:31,031 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2025-03-08 05:01:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:01:31,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2025-03-08 05:01:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:31,033 INFO L225 Difference]: With dead ends: 175 [2025-03-08 05:01:31,033 INFO L226 Difference]: Without dead ends: 173 [2025-03-08 05:01:31,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:01:31,033 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:31,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 264 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2025-03-08 05:01:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2025-03-08 05:01:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-08 05:01:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2025-03-08 05:01:31,056 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2025-03-08 05:01:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:31,056 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2025-03-08 05:01:31,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2025-03-08 05:01:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 05:01:31,058 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:31,058 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 05:01:31,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:31,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:31,259 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:31,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash 429519069, now seen corresponding path program 1 times [2025-03-08 05:01:31,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:31,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489314872] [2025-03-08 05:01:31,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:31,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:31,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:01:31,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:01:31,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:31,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:31,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489314872] [2025-03-08 05:01:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489314872] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:31,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 05:01:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300921858] [2025-03-08 05:01:31,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:31,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 05:01:31,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:31,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 05:01:31,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:31,312 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:31,337 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2025-03-08 05:01:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:01:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2025-03-08 05:01:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:31,341 INFO L225 Difference]: With dead ends: 237 [2025-03-08 05:01:31,341 INFO L226 Difference]: Without dead ends: 170 [2025-03-08 05:01:31,342 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:31,342 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:31,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-03-08 05:01:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2025-03-08 05:01:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-08 05:01:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2025-03-08 05:01:31,359 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2025-03-08 05:01:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:31,359 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2025-03-08 05:01:31,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2025-03-08 05:01:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-08 05:01:31,361 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:31,361 INFO L218 NwaCegarLoop]: trace histogram [3, 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, 1] [2025-03-08 05:01:31,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 05:01:31,361 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:31,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1488699407, now seen corresponding path program 1 times [2025-03-08 05:01:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:31,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590557950] [2025-03-08 05:01:31,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:31,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:01:31,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:01:31,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:31,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:31,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841335275] [2025-03-08 05:01:31,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:31,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:31,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:31,378 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) [2025-03-08 05:01:31,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:01:31,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 05:01:31,411 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 05:01:31,411 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:31,411 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:31,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:01:31,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-08 05:01:31,454 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:01:31,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590557950] [2025-03-08 05:01:31,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:31,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841335275] [2025-03-08 05:01:31,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841335275] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:31,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:31,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207855119] [2025-03-08 05:01:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:31,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:31,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:31,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:31,457 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:01:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:31,508 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2025-03-08 05:01:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:31,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2025-03-08 05:01:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:31,510 INFO L225 Difference]: With dead ends: 235 [2025-03-08 05:01:31,511 INFO L226 Difference]: Without dead ends: 233 [2025-03-08 05:01:31,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:31,511 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 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 [2025-03-08 05:01:31,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-03-08 05:01:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2025-03-08 05:01:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-03-08 05:01:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2025-03-08 05:01:31,538 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2025-03-08 05:01:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:31,538 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2025-03-08 05:01:31,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:01:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2025-03-08 05:01:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:01:31,539 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:31,539 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-08 05:01:31,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:31,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:31,744 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:31,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash -78938596, now seen corresponding path program 1 times [2025-03-08 05:01:31,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:31,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853674328] [2025-03-08 05:01:31,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:31,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:31,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:01:31,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:01:31,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:31,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:31,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848106253] [2025-03-08 05:01:31,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:31,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:31,756 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) [2025-03-08 05:01:31,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:01:31,780 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:01:31,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:01:31,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:31,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:31,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 05:01:31,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:31,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:31,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:31,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853674328] [2025-03-08 05:01:31,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:31,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848106253] [2025-03-08 05:01:31,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848106253] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:31,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:01:31,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-08 05:01:31,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824106705] [2025-03-08 05:01:31,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:31,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 05:01:31,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:31,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 05:01:31,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:01:31,952 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:01:32,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:32,076 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2025-03-08 05:01:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:01:32,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2025-03-08 05:01:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:32,081 INFO L225 Difference]: With dead ends: 238 [2025-03-08 05:01:32,081 INFO L226 Difference]: Without dead ends: 236 [2025-03-08 05:01:32,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:01:32,082 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 37 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 238 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 [2025-03-08 05:01:32,082 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 238 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-03-08 05:01:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2025-03-08 05:01:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-03-08 05:01:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2025-03-08 05:01:32,107 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2025-03-08 05:01:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:32,107 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2025-03-08 05:01:32,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:01:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2025-03-08 05:01:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 05:01:32,109 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:32,109 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:32,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:32,310 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,SelfDestructingSolverStorable11 [2025-03-08 05:01:32,310 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:32,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1633413538, now seen corresponding path program 1 times [2025-03-08 05:01:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534930926] [2025-03-08 05:01:32,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:32,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 05:01:32,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 05:01:32,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:32,321 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:32,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224366451] [2025-03-08 05:01:32,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:32,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:32,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:32,324 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) [2025-03-08 05:01:32,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:01:32,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-08 05:01:32,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 05:01:32,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:32,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:32,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:01:32,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 05:01:32,400 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:01:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534930926] [2025-03-08 05:01:32,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224366451] [2025-03-08 05:01:32,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224366451] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:32,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:32,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126422348] [2025-03-08 05:01:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:32,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:32,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:32,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:32,402 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2025-03-08 05:01:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:32,446 INFO L93 Difference]: Finished difference Result 309 states and 454 transitions. [2025-03-08 05:01:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2025-03-08 05:01:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:32,448 INFO L225 Difference]: With dead ends: 309 [2025-03-08 05:01:32,448 INFO L226 Difference]: Without dead ends: 307 [2025-03-08 05:01:32,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:32,448 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 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 [2025-03-08 05:01:32,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2025-03-08 05:01:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2025-03-08 05:01:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-08 05:01:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2025-03-08 05:01:32,477 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2025-03-08 05:01:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:32,477 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2025-03-08 05:01:32,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2025-03-08 05:01:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2025-03-08 05:01:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 05:01:32,478 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:32,478 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-08 05:01:32,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 05:01:32,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 05:01:32,679 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:32,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1348686203, now seen corresponding path program 1 times [2025-03-08 05:01:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:32,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963840352] [2025-03-08 05:01:32,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:32,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:01:32,686 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:01:32,686 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:32,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:32,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963840352] [2025-03-08 05:01:32,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963840352] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:32,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367147570] [2025-03-08 05:01:32,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:32,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:32,778 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) [2025-03-08 05:01:32,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:01:32,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:01:32,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:01:32,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:32,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:32,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 05:01:32,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:32,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:32,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367147570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:32,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:01:32,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-03-08 05:01:32,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775833981] [2025-03-08 05:01:32,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:32,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:01:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:32,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:01:32,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:01:32,919 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:01:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:33,159 INFO L93 Difference]: Finished difference Result 1094 states and 1585 transitions. [2025-03-08 05:01:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 05:01:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-03-08 05:01:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:33,166 INFO L225 Difference]: With dead ends: 1094 [2025-03-08 05:01:33,166 INFO L226 Difference]: Without dead ends: 897 [2025-03-08 05:01:33,167 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:01:33,168 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 195 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:33,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 307 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2025-03-08 05:01:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 858. [2025-03-08 05:01:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 568 states have (on average 1.2922535211267605) internal successors, (734), 591 states have internal predecessors, (734), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2025-03-08 05:01:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1192 transitions. [2025-03-08 05:01:33,250 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1192 transitions. Word has length 38 [2025-03-08 05:01:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:33,251 INFO L471 AbstractCegarLoop]: Abstraction has 858 states and 1192 transitions. [2025-03-08 05:01:33,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:01:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1192 transitions. [2025-03-08 05:01:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 05:01:33,251 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:33,251 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:33,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:33,455 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,SelfDestructingSolverStorable13 [2025-03-08 05:01:33,455 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:33,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1981833881, now seen corresponding path program 1 times [2025-03-08 05:01:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:33,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95260333] [2025-03-08 05:01:33,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:33,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:01:33,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:01:33,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:33,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:33,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:33,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95260333] [2025-03-08 05:01:33,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95260333] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:33,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686204983] [2025-03-08 05:01:33,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:33,513 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) [2025-03-08 05:01:33,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:01:33,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:01:33,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:01:33,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:33,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:33,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:01:33,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:33,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:33,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686204983] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:33,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:01:33,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-03-08 05:01:33,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809722075] [2025-03-08 05:01:33,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:33,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:01:33,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:33,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:01:33,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:01:33,638 INFO L87 Difference]: Start difference. First operand 858 states and 1192 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:01:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:33,852 INFO L93 Difference]: Finished difference Result 1267 states and 1779 transitions. [2025-03-08 05:01:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:01:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-03-08 05:01:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:33,858 INFO L225 Difference]: With dead ends: 1267 [2025-03-08 05:01:33,858 INFO L226 Difference]: Without dead ends: 863 [2025-03-08 05:01:33,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:01:33,860 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 135 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:33,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 253 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:01:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2025-03-08 05:01:33,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 855. [2025-03-08 05:01:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 565 states have (on average 1.2601769911504426) internal successors, (712), 588 states have internal predecessors, (712), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2025-03-08 05:01:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1170 transitions. [2025-03-08 05:01:33,940 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1170 transitions. Word has length 38 [2025-03-08 05:01:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:33,940 INFO L471 AbstractCegarLoop]: Abstraction has 855 states and 1170 transitions. [2025-03-08 05:01:33,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:01:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1170 transitions. [2025-03-08 05:01:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-08 05:01:33,941 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:33,941 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:33,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:01:34,141 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,SelfDestructingSolverStorable14 [2025-03-08 05:01:34,142 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:34,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:34,142 INFO L85 PathProgramCache]: Analyzing trace with hash 492650833, now seen corresponding path program 2 times [2025-03-08 05:01:34,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:34,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90752128] [2025-03-08 05:01:34,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:01:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:34,146 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-08 05:01:34,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 05:01:34,150 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:01:34,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:01:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90752128] [2025-03-08 05:01:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90752128] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466205570] [2025-03-08 05:01:34,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:34,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:34,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:34,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:34,189 INFO L87 Difference]: Start difference. First operand 855 states and 1170 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:34,308 INFO L93 Difference]: Finished difference Result 1147 states and 1612 transitions. [2025-03-08 05:01:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:01:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2025-03-08 05:01:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:34,312 INFO L225 Difference]: With dead ends: 1147 [2025-03-08 05:01:34,312 INFO L226 Difference]: Without dead ends: 911 [2025-03-08 05:01:34,313 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 [2025-03-08 05:01:34,313 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:34,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2025-03-08 05:01:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 803. [2025-03-08 05:01:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2025-03-08 05:01:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2025-03-08 05:01:34,380 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2025-03-08 05:01:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:34,380 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2025-03-08 05:01:34,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-08 05:01:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2025-03-08 05:01:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-08 05:01:34,381 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:34,381 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:34,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-08 05:01:34,381 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:34,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 657747001, now seen corresponding path program 1 times [2025-03-08 05:01:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:34,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107504018] [2025-03-08 05:01:34,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:34,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:34,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 05:01:34,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 05:01:34,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:34,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510496122] [2025-03-08 05:01:34,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:34,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:34,393 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) [2025-03-08 05:01:34,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:01:34,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 05:01:34,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 05:01:34,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:34,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:34,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-08 05:01:34,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 05:01:35,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-08 05:01:35,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107504018] [2025-03-08 05:01:35,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:35,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510496122] [2025-03-08 05:01:35,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510496122] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:35,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:01:35,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-08 05:01:35,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985969246] [2025-03-08 05:01:35,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:35,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:01:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:35,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:01:35,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:01:35,378 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-08 05:01:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:37,048 INFO L93 Difference]: Finished difference Result 1387 states and 1908 transitions. [2025-03-08 05:01:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 05:01:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2025-03-08 05:01:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:37,053 INFO L225 Difference]: With dead ends: 1387 [2025-03-08 05:01:37,054 INFO L226 Difference]: Without dead ends: 1053 [2025-03-08 05:01:37,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 05:01:37,056 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 238 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:37,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 719 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 05:01:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2025-03-08 05:01:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 898. [2025-03-08 05:01:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 606 states have (on average 1.2508250825082508) internal successors, (758), 624 states have internal predecessors, (758), 226 states have call successors, (226), 65 states have call predecessors, (226), 65 states have return successors, (222), 208 states have call predecessors, (222), 222 states have call successors, (222) [2025-03-08 05:01:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1206 transitions. [2025-03-08 05:01:37,188 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1206 transitions. Word has length 54 [2025-03-08 05:01:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:37,188 INFO L471 AbstractCegarLoop]: Abstraction has 898 states and 1206 transitions. [2025-03-08 05:01:37,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-08 05:01:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1206 transitions. [2025-03-08 05:01:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-08 05:01:37,189 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:37,189 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2025-03-08 05:01:37,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:37,393 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,SelfDestructingSolverStorable16 [2025-03-08 05:01:37,393 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:37,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash -114883297, now seen corresponding path program 1 times [2025-03-08 05:01:37,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:37,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694442122] [2025-03-08 05:01:37,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:37,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:37,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-08 05:01:37,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 05:01:37,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:37,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-08 05:01:37,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694442122] [2025-03-08 05:01:37,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694442122] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010275571] [2025-03-08 05:01:37,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:37,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:37,527 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) [2025-03-08 05:01:37,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:01:37,553 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-08 05:01:37,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-08 05:01:37,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:37,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:37,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 05:01:37,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-08 05:01:37,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-08 05:01:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010275571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:37,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:01:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2025-03-08 05:01:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95417363] [2025-03-08 05:01:37,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:37,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:01:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:37,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:01:37,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:01:37,748 INFO L87 Difference]: Start difference. First operand 898 states and 1206 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-03-08 05:01:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:38,328 INFO L93 Difference]: Finished difference Result 1992 states and 2821 transitions. [2025-03-08 05:01:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 05:01:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2025-03-08 05:01:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:38,337 INFO L225 Difference]: With dead ends: 1992 [2025-03-08 05:01:38,337 INFO L226 Difference]: Without dead ends: 1970 [2025-03-08 05:01:38,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2025-03-08 05:01:38,338 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 337 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:38,338 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 304 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:01:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2025-03-08 05:01:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1870. [2025-03-08 05:01:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1246 states have (on average 1.2913322632423756) internal successors, (1609), 1305 states have internal predecessors, (1609), 518 states have call successors, (518), 105 states have call predecessors, (518), 105 states have return successors, (510), 459 states have call predecessors, (510), 510 states have call successors, (510) [2025-03-08 05:01:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2637 transitions. [2025-03-08 05:01:38,644 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2637 transitions. Word has length 60 [2025-03-08 05:01:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:38,644 INFO L471 AbstractCegarLoop]: Abstraction has 1870 states and 2637 transitions. [2025-03-08 05:01:38,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2025-03-08 05:01:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2637 transitions. [2025-03-08 05:01:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-08 05:01:38,645 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:38,645 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:38,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:38,845 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,SelfDestructingSolverStorable17 [2025-03-08 05:01:38,845 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:38,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 896233895, now seen corresponding path program 1 times [2025-03-08 05:01:38,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:38,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123525137] [2025-03-08 05:01:38,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:38,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-08 05:01:38,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 05:01:38,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:38,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:38,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668648861] [2025-03-08 05:01:38,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:38,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:38,858 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) [2025-03-08 05:01:38,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:01:38,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-08 05:01:38,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-08 05:01:38,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:38,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:38,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 05:01:38,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-03-08 05:01:38,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-03-08 05:01:38,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123525137] [2025-03-08 05:01:38,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:38,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668648861] [2025-03-08 05:01:38,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668648861] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:38,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:01:38,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2025-03-08 05:01:38,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252224345] [2025-03-08 05:01:38,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:38,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:38,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:38,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:38,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:01:38,995 INFO L87 Difference]: Start difference. First operand 1870 states and 2637 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, (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) [2025-03-08 05:01:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:39,335 INFO L93 Difference]: Finished difference Result 1908 states and 2674 transitions. [2025-03-08 05:01:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:39,335 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, (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 63 [2025-03-08 05:01:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:39,345 INFO L225 Difference]: With dead ends: 1908 [2025-03-08 05:01:39,345 INFO L226 Difference]: Without dead ends: 1906 [2025-03-08 05:01:39,346 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:01:39,346 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 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 [2025-03-08 05:01:39,346 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2025-03-08 05:01:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1906. [2025-03-08 05:01:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1273 states have (on average 1.2835820895522387) internal successors, (1634), 1332 states have internal predecessors, (1634), 518 states have call successors, (518), 114 states have call predecessors, (518), 114 states have return successors, (510), 459 states have call predecessors, (510), 510 states have call successors, (510) [2025-03-08 05:01:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2662 transitions. [2025-03-08 05:01:39,666 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2662 transitions. Word has length 63 [2025-03-08 05:01:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:39,667 INFO L471 AbstractCegarLoop]: Abstraction has 1906 states and 2662 transitions. [2025-03-08 05:01:39,667 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, (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) [2025-03-08 05:01:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2662 transitions. [2025-03-08 05:01:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-08 05:01:39,667 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:39,667 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2025-03-08 05:01:39,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:01:39,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:39,868 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:39,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash 186070766, now seen corresponding path program 1 times [2025-03-08 05:01:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:39,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324444619] [2025-03-08 05:01:39,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:39,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:39,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-08 05:01:39,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-08 05:01:39,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:39,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:39,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092965789] [2025-03-08 05:01:39,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:39,884 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) [2025-03-08 05:01:39,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:01:39,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-08 05:01:39,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-08 05:01:39,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:39,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:39,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 05:01:39,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 05:01:40,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:40,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:40,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324444619] [2025-03-08 05:01:40,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:40,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092965789] [2025-03-08 05:01:40,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092965789] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:01:40,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:01:40,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2025-03-08 05:01:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237809669] [2025-03-08 05:01:40,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:40,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:01:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:40,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:01:40,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:01:40,362 INFO L87 Difference]: Start difference. First operand 1906 states and 2662 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:01:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:40,984 INFO L93 Difference]: Finished difference Result 2259 states and 3194 transitions. [2025-03-08 05:01:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:01:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2025-03-08 05:01:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:40,993 INFO L225 Difference]: With dead ends: 2259 [2025-03-08 05:01:40,993 INFO L226 Difference]: Without dead ends: 2257 [2025-03-08 05:01:40,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:01:40,994 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 113 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:40,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 679 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:01:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2025-03-08 05:01:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2212. [2025-03-08 05:01:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1473 states have (on average 1.2993890020366599) internal successors, (1914), 1545 states have internal predecessors, (1914), 618 states have call successors, (618), 120 states have call predecessors, (618), 120 states have return successors, (610), 546 states have call predecessors, (610), 610 states have call successors, (610) [2025-03-08 05:01:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3142 transitions. [2025-03-08 05:01:41,468 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3142 transitions. Word has length 66 [2025-03-08 05:01:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:41,468 INFO L471 AbstractCegarLoop]: Abstraction has 2212 states and 3142 transitions. [2025-03-08 05:01:41,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:01:41,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3142 transitions. [2025-03-08 05:01:41,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-08 05:01:41,469 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:41,469 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:41,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 05:01:41,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:41,670 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:41,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:41,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1212046358, now seen corresponding path program 2 times [2025-03-08 05:01:41,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:41,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135672946] [2025-03-08 05:01:41,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:01:41,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:41,673 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-03-08 05:01:41,678 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-08 05:01:41,678 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:01:41,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-08 05:01:41,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:41,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135672946] [2025-03-08 05:01:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135672946] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:01:41,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:01:41,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:01:41,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822038475] [2025-03-08 05:01:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:01:41,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:01:41,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:41,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:01:41,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:01:41,721 INFO L87 Difference]: Start difference. First operand 2212 states and 3142 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-08 05:01:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:42,041 INFO L93 Difference]: Finished difference Result 3466 states and 4894 transitions. [2025-03-08 05:01:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:01:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2025-03-08 05:01:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:42,050 INFO L225 Difference]: With dead ends: 3466 [2025-03-08 05:01:42,051 INFO L226 Difference]: Without dead ends: 2114 [2025-03-08 05:01:42,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:01:42,071 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:42,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:01:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2025-03-08 05:01:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2035. [2025-03-08 05:01:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1400 states have (on average 1.2871428571428571) internal successors, (1802), 1431 states have internal predecessors, (1802), 514 states have call successors, (514), 120 states have call predecessors, (514), 120 states have return successors, (506), 483 states have call predecessors, (506), 506 states have call successors, (506) [2025-03-08 05:01:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2822 transitions. [2025-03-08 05:01:42,358 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2822 transitions. Word has length 69 [2025-03-08 05:01:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:42,358 INFO L471 AbstractCegarLoop]: Abstraction has 2035 states and 2822 transitions. [2025-03-08 05:01:42,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-08 05:01:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2822 transitions. [2025-03-08 05:01:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-08 05:01:42,359 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:42,359 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2025-03-08 05:01:42,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-08 05:01:42,359 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:42,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1177494785, now seen corresponding path program 3 times [2025-03-08 05:01:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069827420] [2025-03-08 05:01:42,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:01:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:42,363 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 6 equivalence classes. [2025-03-08 05:01:42,378 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 05:01:42,378 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-08 05:01:42,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026122891] [2025-03-08 05:01:42,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:01:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:42,382 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) [2025-03-08 05:01:42,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:01:42,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 71 statements into 6 equivalence classes. [2025-03-08 05:01:42,424 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 56 of 71 statements. [2025-03-08 05:01:42,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 05:01:42,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:42,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-08 05:01:42,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-08 05:01:42,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-08 05:01:43,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069827420] [2025-03-08 05:01:43,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:43,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026122891] [2025-03-08 05:01:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026122891] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:43,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:01:43,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2025-03-08 05:01:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834144489] [2025-03-08 05:01:43,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:43,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 05:01:43,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:43,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 05:01:43,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2025-03-08 05:01:43,410 INFO L87 Difference]: Start difference. First operand 2035 states and 2822 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 26 states have internal predecessors, (76), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:01:49,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-08 05:01:51,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-08 05:01:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:55,019 INFO L93 Difference]: Finished difference Result 2781 states and 3902 transitions. [2025-03-08 05:01:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-03-08 05:01:55,023 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 26 states have internal predecessors, (76), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 71 [2025-03-08 05:01:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:55,032 INFO L225 Difference]: With dead ends: 2781 [2025-03-08 05:01:55,032 INFO L226 Difference]: Without dead ends: 2779 [2025-03-08 05:01:55,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1383, Invalid=5423, Unknown=0, NotChecked=0, Total=6806 [2025-03-08 05:01:55,035 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 578 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 383 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:55,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1050 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 702 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2025-03-08 05:01:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2025-03-08 05:01:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2399. [2025-03-08 05:01:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 1695 states have (on average 1.2938053097345132) internal successors, (2193), 1729 states have internal predecessors, (2193), 562 states have call successors, (562), 141 states have call predecessors, (562), 141 states have return successors, (554), 528 states have call predecessors, (554), 554 states have call successors, (554) [2025-03-08 05:01:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3309 transitions. [2025-03-08 05:01:55,631 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3309 transitions. Word has length 71 [2025-03-08 05:01:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:55,632 INFO L471 AbstractCegarLoop]: Abstraction has 2399 states and 3309 transitions. [2025-03-08 05:01:55,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 26 states have internal predecessors, (76), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-08 05:01:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3309 transitions. [2025-03-08 05:01:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-08 05:01:55,633 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:55,633 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:55,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:55,834 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,SelfDestructingSolverStorable21 [2025-03-08 05:01:55,835 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:55,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1979991359, now seen corresponding path program 1 times [2025-03-08 05:01:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:55,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530618797] [2025-03-08 05:01:55,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:55,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:55,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-03-08 05:01:55,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 05:01:55,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:55,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32941900] [2025-03-08 05:01:55,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:55,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:55,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:55,850 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) [2025-03-08 05:01:55,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:01:55,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-03-08 05:01:55,895 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-03-08 05:01:55,895 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:55,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:55,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 05:01:55,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-03-08 05:01:56,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:01:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-03-08 05:01:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:01:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530618797] [2025-03-08 05:01:56,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:01:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32941900] [2025-03-08 05:01:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32941900] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:01:56,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:01:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-03-08 05:01:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820099807] [2025-03-08 05:01:56,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:01:56,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:01:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:01:56,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:01:56,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:01:56,272 INFO L87 Difference]: Start difference. First operand 2399 states and 3309 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-03-08 05:01:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:01:57,770 INFO L93 Difference]: Finished difference Result 3641 states and 5279 transitions. [2025-03-08 05:01:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 05:01:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 85 [2025-03-08 05:01:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:01:57,783 INFO L225 Difference]: With dead ends: 3641 [2025-03-08 05:01:57,783 INFO L226 Difference]: Without dead ends: 3637 [2025-03-08 05:01:57,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:01:57,784 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 164 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:01:57,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 496 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:01:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3637 states. [2025-03-08 05:01:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3637 to 3407. [2025-03-08 05:01:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 2216 states have (on average 1.342509025270758) internal successors, (2975), 2271 states have internal predecessors, (2975), 1026 states have call successors, (1026), 165 states have call predecessors, (1026), 164 states have return successors, (1018), 970 states have call predecessors, (1018), 1018 states have call successors, (1018) [2025-03-08 05:01:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 5019 transitions. [2025-03-08 05:01:58,881 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 5019 transitions. Word has length 85 [2025-03-08 05:01:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:01:58,882 INFO L471 AbstractCegarLoop]: Abstraction has 3407 states and 5019 transitions. [2025-03-08 05:01:58,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 18 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-03-08 05:01:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 5019 transitions. [2025-03-08 05:01:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-08 05:01:58,883 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:01:58,883 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:01:58,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 05:01:59,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:59,083 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:01:59,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:01:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -748950492, now seen corresponding path program 1 times [2025-03-08 05:01:59,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:01:59,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174879011] [2025-03-08 05:01:59,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:59,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:01:59,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-08 05:01:59,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 05:01:59,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:59,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:01:59,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298312144] [2025-03-08 05:01:59,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:01:59,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:01:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:01:59,099 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) [2025-03-08 05:01:59,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:01:59,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-03-08 05:01:59,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 05:01:59,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:01:59,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:01:59,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-08 05:01:59,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:01:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-08 05:01:59,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-08 05:02:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:00,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174879011] [2025-03-08 05:02:00,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:00,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298312144] [2025-03-08 05:02:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298312144] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:00,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:00,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2025-03-08 05:02:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383851849] [2025-03-08 05:02:00,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:00,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 05:02:00,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:00,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 05:02:00,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:02:00,560 INFO L87 Difference]: Start difference. First operand 3407 states and 5019 transitions. Second operand has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-08 05:02:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:09,024 INFO L93 Difference]: Finished difference Result 4387 states and 6400 transitions. [2025-03-08 05:02:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2025-03-08 05:02:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 84 [2025-03-08 05:02:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:09,038 INFO L225 Difference]: With dead ends: 4387 [2025-03-08 05:02:09,038 INFO L226 Difference]: Without dead ends: 4366 [2025-03-08 05:02:09,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1654, Invalid=6178, Unknown=0, NotChecked=0, Total=7832 [2025-03-08 05:02:09,040 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 457 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:09,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 1541 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2025-03-08 05:02:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2025-03-08 05:02:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3966. [2025-03-08 05:02:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 2679 states have (on average 1.3422918999626727) internal successors, (3596), 2735 states have internal predecessors, (3596), 1105 states have call successors, (1105), 181 states have call predecessors, (1105), 181 states have return successors, (1098), 1049 states have call predecessors, (1098), 1098 states have call successors, (1098) [2025-03-08 05:02:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 5799 transitions. [2025-03-08 05:02:10,730 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 5799 transitions. Word has length 84 [2025-03-08 05:02:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:10,730 INFO L471 AbstractCegarLoop]: Abstraction has 3966 states and 5799 transitions. [2025-03-08 05:02:10,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-08 05:02:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 5799 transitions. [2025-03-08 05:02:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-08 05:02:10,731 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:10,731 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:10,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 05:02:10,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:10,936 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:10,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 235898092, now seen corresponding path program 1 times [2025-03-08 05:02:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:10,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015818421] [2025-03-08 05:02:10,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:10,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-03-08 05:02:10,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-03-08 05:02:10,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:10,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107589291] [2025-03-08 05:02:10,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:10,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:10,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:10,950 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) [2025-03-08 05:02:10,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:02:10,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-03-08 05:02:10,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-03-08 05:02:10,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:10,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:10,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 05:02:10,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2025-03-08 05:02:11,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-08 05:02:11,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:11,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015818421] [2025-03-08 05:02:11,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:11,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107589291] [2025-03-08 05:02:11,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107589291] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:11,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:11,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-08 05:02:11,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689923486] [2025-03-08 05:02:11,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:11,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:02:11,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:11,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:02:11,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:02:11,845 INFO L87 Difference]: Start difference. First operand 3966 states and 5799 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 20 states have internal predecessors, (68), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-03-08 05:02:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:19,785 INFO L93 Difference]: Finished difference Result 4932 states and 7298 transitions. [2025-03-08 05:02:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-08 05:02:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 20 states have internal predecessors, (68), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 87 [2025-03-08 05:02:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:19,801 INFO L225 Difference]: With dead ends: 4932 [2025-03-08 05:02:19,801 INFO L226 Difference]: Without dead ends: 4926 [2025-03-08 05:02:19,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1114, Invalid=4142, Unknown=0, NotChecked=0, Total=5256 [2025-03-08 05:02:19,803 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 316 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:19,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 950 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-03-08 05:02:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2025-03-08 05:02:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4469. [2025-03-08 05:02:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 3002 states have (on average 1.352431712191872) internal successors, (4060), 3061 states have internal predecessors, (4060), 1272 states have call successors, (1272), 195 states have call predecessors, (1272), 194 states have return successors, (1266), 1212 states have call predecessors, (1266), 1266 states have call successors, (1266) [2025-03-08 05:02:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 6598 transitions. [2025-03-08 05:02:21,992 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 6598 transitions. Word has length 87 [2025-03-08 05:02:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:21,993 INFO L471 AbstractCegarLoop]: Abstraction has 4469 states and 6598 transitions. [2025-03-08 05:02:21,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 20 states have internal predecessors, (68), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2025-03-08 05:02:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 6598 transitions. [2025-03-08 05:02:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-08 05:02:21,995 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:21,995 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:22,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:22,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:22,195 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:22,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1739702727, now seen corresponding path program 4 times [2025-03-08 05:02:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124290665] [2025-03-08 05:02:22,200 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:02:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:22,203 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 93 statements into 2 equivalence classes. [2025-03-08 05:02:22,219 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-08 05:02:22,219 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:02:22,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:22,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974323688] [2025-03-08 05:02:22,222 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:02:22,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:22,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:22,224 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) [2025-03-08 05:02:22,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 05:02:22,252 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 93 statements into 2 equivalence classes. [2025-03-08 05:02:22,272 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 80 of 93 statements. [2025-03-08 05:02:22,272 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:02:22,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:22,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-08 05:02:22,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2025-03-08 05:02:22,926 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2025-03-08 05:02:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124290665] [2025-03-08 05:02:23,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974323688] [2025-03-08 05:02:23,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974323688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:23,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:23,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 24 [2025-03-08 05:02:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013418474] [2025-03-08 05:02:23,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:23,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:02:23,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:23,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:02:23,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:02:23,052 INFO L87 Difference]: Start difference. First operand 4469 states and 6598 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 21 states have internal predecessors, (85), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2025-03-08 05:02:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:26,611 INFO L93 Difference]: Finished difference Result 4912 states and 7226 transitions. [2025-03-08 05:02:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 05:02:26,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 21 states have internal predecessors, (85), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 93 [2025-03-08 05:02:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:26,628 INFO L225 Difference]: With dead ends: 4912 [2025-03-08 05:02:26,628 INFO L226 Difference]: Without dead ends: 4910 [2025-03-08 05:02:26,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:02:26,630 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 155 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:26,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 701 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-08 05:02:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2025-03-08 05:02:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4769. [2025-03-08 05:02:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 3266 states have (on average 1.3530312308634416) internal successors, (4419), 3341 states have internal predecessors, (4419), 1295 states have call successors, (1295), 208 states have call predecessors, (1295), 207 states have return successors, (1289), 1219 states have call predecessors, (1289), 1289 states have call successors, (1289) [2025-03-08 05:02:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 7003 transitions. [2025-03-08 05:02:28,783 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 7003 transitions. Word has length 93 [2025-03-08 05:02:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:28,783 INFO L471 AbstractCegarLoop]: Abstraction has 4769 states and 7003 transitions. [2025-03-08 05:02:28,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 21 states have internal predecessors, (85), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2025-03-08 05:02:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 7003 transitions. [2025-03-08 05:02:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-08 05:02:28,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:28,784 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:28,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 05:02:28,989 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,SelfDestructingSolverStorable25 [2025-03-08 05:02:28,989 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:28,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -762534300, now seen corresponding path program 1 times [2025-03-08 05:02:28,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:28,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4869916] [2025-03-08 05:02:28,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:28,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 94 statements into 1 equivalence classes. [2025-03-08 05:02:28,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 94 of 94 statements. [2025-03-08 05:02:28,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:28,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-08 05:02:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4869916] [2025-03-08 05:02:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4869916] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675334717] [2025-03-08 05:02:29,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:29,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:29,164 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) [2025-03-08 05:02:29,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 05:02:29,190 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 94 statements into 1 equivalence classes. [2025-03-08 05:02:29,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 94 of 94 statements. [2025-03-08 05:02:29,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:29,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:29,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 05:02:29,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-03-08 05:02:29,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-08 05:02:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675334717] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:29,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:02:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2025-03-08 05:02:29,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924856499] [2025-03-08 05:02:29,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:29,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:02:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:29,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:02:29,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:02:29,505 INFO L87 Difference]: Start difference. First operand 4769 states and 7003 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2025-03-08 05:02:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:35,962 INFO L93 Difference]: Finished difference Result 12387 states and 19349 transitions. [2025-03-08 05:02:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-08 05:02:35,962 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 94 [2025-03-08 05:02:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:35,994 INFO L225 Difference]: With dead ends: 12387 [2025-03-08 05:02:35,994 INFO L226 Difference]: Without dead ends: 10722 [2025-03-08 05:02:36,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 05:02:36,001 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 452 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:36,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 443 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:02:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10722 states. [2025-03-08 05:02:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10722 to 10319. [2025-03-08 05:02:42,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 6388 states have (on average 1.3724170319348779) internal successors, (8767), 6452 states have internal predecessors, (8767), 3567 states have call successors, (3567), 364 states have call predecessors, (3567), 363 states have return successors, (3555), 3502 states have call predecessors, (3555), 3555 states have call successors, (3555) [2025-03-08 05:02:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 15889 transitions. [2025-03-08 05:02:42,179 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 15889 transitions. Word has length 94 [2025-03-08 05:02:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:42,180 INFO L471 AbstractCegarLoop]: Abstraction has 10319 states and 15889 transitions. [2025-03-08 05:02:42,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2025-03-08 05:02:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 15889 transitions. [2025-03-08 05:02:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 05:02:42,181 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:42,181 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:42,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 05:02:42,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 05:02:42,382 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:42,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1271407100, now seen corresponding path program 2 times [2025-03-08 05:02:42,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:42,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349872665] [2025-03-08 05:02:42,383 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:42,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:42,388 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-08 05:02:42,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 05:02:42,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:42,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-03-08 05:02:42,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349872665] [2025-03-08 05:02:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349872665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880393894] [2025-03-08 05:02:42,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:42,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:42,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:42,502 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:42,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 05:02:42,529 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 95 statements into 2 equivalence classes. [2025-03-08 05:02:42,551 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 05:02:42,551 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:42,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:42,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:02:42,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-03-08 05:02:42,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-03-08 05:02:42,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880393894] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:42,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:02:42,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-03-08 05:02:42,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917498309] [2025-03-08 05:02:42,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:42,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:02:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:42,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:02:42,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:02:42,725 INFO L87 Difference]: Start difference. First operand 10319 states and 15889 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-08 05:02:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:50,806 INFO L93 Difference]: Finished difference Result 13750 states and 21390 transitions. [2025-03-08 05:02:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-08 05:02:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2025-03-08 05:02:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:50,846 INFO L225 Difference]: With dead ends: 13750 [2025-03-08 05:02:50,846 INFO L226 Difference]: Without dead ends: 13234 [2025-03-08 05:02:50,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:02:50,852 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 234 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:50,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 632 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:02:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13234 states. [2025-03-08 05:02:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13234 to 10425. [2025-03-08 05:02:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10425 states, 6500 states have (on average 1.3707692307692307) internal successors, (8910), 6566 states have internal predecessors, (8910), 3561 states have call successors, (3561), 364 states have call predecessors, (3561), 363 states have return successors, (3549), 3494 states have call predecessors, (3549), 3549 states have call successors, (3549) [2025-03-08 05:02:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10425 states to 10425 states and 16020 transitions. [2025-03-08 05:02:57,252 INFO L78 Accepts]: Start accepts. Automaton has 10425 states and 16020 transitions. Word has length 95 [2025-03-08 05:02:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:57,253 INFO L471 AbstractCegarLoop]: Abstraction has 10425 states and 16020 transitions. [2025-03-08 05:02:57,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-08 05:02:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10425 states and 16020 transitions. [2025-03-08 05:02:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-03-08 05:02:57,254 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:57,254 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:57,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 05:02:57,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 05:02:57,455 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:57,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1765482647, now seen corresponding path program 2 times [2025-03-08 05:02:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335112294] [2025-03-08 05:02:57,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:57,461 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 104 statements into 2 equivalence classes. [2025-03-08 05:02:57,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 05:02:57,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:57,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363036944] [2025-03-08 05:02:57,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:57,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:57,478 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:57,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 05:02:57,508 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 104 statements into 2 equivalence classes. [2025-03-08 05:02:57,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 104 of 104 statements. [2025-03-08 05:02:57,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:57,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:57,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-08 05:02:57,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-03-08 05:02:58,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2025-03-08 05:02:58,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335112294] [2025-03-08 05:02:58,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363036944] [2025-03-08 05:02:58,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363036944] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:58,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:58,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2025-03-08 05:02:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955921342] [2025-03-08 05:02:58,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:58,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:02:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:58,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:02:58,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:02:58,707 INFO L87 Difference]: Start difference. First operand 10425 states and 16020 transitions. Second operand has 24 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26)