./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.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 eb7e704db84b45f8c7f1cb386fc610e1107f57c6e67c0a3b2af510d7426cfd4f --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:04:06,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:04:06,602 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:04:06,608 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:04:06,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:04:06,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:04:06,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:04:06,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:04:06,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:04:06,630 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:04:06,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:04:06,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:04:06,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:04:06,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:04:06,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:04:06,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:04:06,633 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:04:06,633 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:04:06,634 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:04:06,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:04:06,634 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 -> eb7e704db84b45f8c7f1cb386fc610e1107f57c6e67c0a3b2af510d7426cfd4f [2025-03-16 18:04:06,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:04:06,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:04:06,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:04:06,891 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:04:06,891 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:04:06,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2025-03-16 18:04:08,055 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5733eef54/fd64879a5a5c4b2693f8783167a0014a/FLAGbc1632b29 [2025-03-16 18:04:08,284 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:04:08,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2025-03-16 18:04:08,295 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5733eef54/fd64879a5a5c4b2693f8783167a0014a/FLAGbc1632b29 [2025-03-16 18:04:08,307 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5733eef54/fd64879a5a5c4b2693f8783167a0014a [2025-03-16 18:04:08,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:04:08,312 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:04:08,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:04:08,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:04:08,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:04:08,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f926ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08, skipping insertion in model container [2025-03-16 18:04:08,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,336 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:04:08,460 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/dijkstra-u_unwindbound5.c[525,538] [2025-03-16 18:04:08,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:04:08,502 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:04:08,513 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/dijkstra-u_unwindbound5.c[525,538] [2025-03-16 18:04:08,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:04:08,545 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:04:08,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08 WrapperNode [2025-03-16 18:04:08,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:04:08,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:04:08,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:04:08,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:04:08,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,575 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2025-03-16 18:04:08,576 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:04:08,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:04:08,577 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:04:08,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:04:08,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,590 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,599 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]. [2025-03-16 18:04:08,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,602 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,602 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,603 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,604 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:04:08,605 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:04:08,605 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:04:08,605 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:04:08,606 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (1/1) ... [2025-03-16 18:04:08,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:04:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:04:08,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 18:04:08,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 18:04:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:04:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:04:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:04:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:04:08,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:04:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:04:08,721 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:04:08,723 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:04:08,926 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-16 18:04:08,930 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:04:08,937 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:04:08,939 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:04:08,939 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:04:08 BoogieIcfgContainer [2025-03-16 18:04:08,939 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:04:08,941 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:04:08,941 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:04:08,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:04:08,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:04:08" (1/3) ... [2025-03-16 18:04:08,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735a68d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:04:08, skipping insertion in model container [2025-03-16 18:04:08,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:04:08" (2/3) ... [2025-03-16 18:04:08,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735a68d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:04:08, skipping insertion in model container [2025-03-16 18:04:08,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:04:08" (3/3) ... [2025-03-16 18:04:08,947 INFO L128 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound5.c [2025-03-16 18:04:08,960 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:04:08,962 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dijkstra-u_unwindbound5.c that has 2 procedures, 28 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 18:04:09,002 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:04:09,013 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;@55205b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:04:09,013 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:04:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-16 18:04:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 18:04:09,020 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:09,021 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:09,021 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:09,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1518983890, now seen corresponding path program 1 times [2025-03-16 18:04:09,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:09,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839935120] [2025-03-16 18:04:09,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:09,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 18:04:09,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 18:04:09,104 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:09,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:09,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:09,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839935120] [2025-03-16 18:04:09,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839935120] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:04:09,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:04:09,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 18:04:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339047087] [2025-03-16 18:04:09,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:04:09,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:04:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:09,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:04:09,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:04:09,157 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:09,173 INFO L93 Difference]: Finished difference Result 54 states and 94 transitions. [2025-03-16 18:04:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:04:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 18:04:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:09,178 INFO L225 Difference]: With dead ends: 54 [2025-03-16 18:04:09,178 INFO L226 Difference]: Without dead ends: 25 [2025-03-16 18:04:09,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:04:09,185 INFO L435 NwaCegarLoop]: 40 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, 40 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 [2025-03-16 18:04:09,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:04:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-16 18:04:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-03-16 18:04:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:04:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2025-03-16 18:04:09,214 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 9 [2025-03-16 18:04:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:09,214 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2025-03-16 18:04:09,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2025-03-16 18:04:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 18:04:09,215 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:09,215 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:09,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 18:04:09,217 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:09,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1098429594, now seen corresponding path program 1 times [2025-03-16 18:04:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967373652] [2025-03-16 18:04:09,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:09,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 18:04:09,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 18:04:09,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:09,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:09,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967373652] [2025-03-16 18:04:09,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967373652] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:04:09,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:04:09,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 18:04:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451116974] [2025-03-16 18:04:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:04:09,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:04:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:09,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:04:09,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:04:09,309 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:09,332 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2025-03-16 18:04:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:04:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 18:04:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:09,335 INFO L225 Difference]: With dead ends: 46 [2025-03-16 18:04:09,336 INFO L226 Difference]: Without dead ends: 27 [2025-03-16 18:04:09,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:04:09,336 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:09,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:04:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-16 18:04:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-16 18:04:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 18:04:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2025-03-16 18:04:09,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 11 [2025-03-16 18:04:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:09,346 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2025-03-16 18:04:09,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2025-03-16 18:04:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 18:04:09,346 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:09,346 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:09,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:04:09,346 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:09,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1249900870, now seen corresponding path program 1 times [2025-03-16 18:04:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950834260] [2025-03-16 18:04:09,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:09,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:09,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 18:04:09,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 18:04:09,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:09,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950834260] [2025-03-16 18:04:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950834260] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:04:09,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:04:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:04:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867485305] [2025-03-16 18:04:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:04:09,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:04:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:09,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:04:09,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:04:09,711 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:10,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:04:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:10,943 INFO L93 Difference]: Finished difference Result 63 states and 96 transitions. [2025-03-16 18:04:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:04:10,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 18:04:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:10,944 INFO L225 Difference]: With dead ends: 63 [2025-03-16 18:04:10,944 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 18:04:10,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:04:10,945 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:10,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 138 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-16 18:04:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 18:04:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2025-03-16 18:04:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 18:04:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 60 transitions. [2025-03-16 18:04:10,962 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 60 transitions. Word has length 12 [2025-03-16 18:04:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:10,962 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 60 transitions. [2025-03-16 18:04:10,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 60 transitions. [2025-03-16 18:04:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-16 18:04:10,962 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:10,962 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:10,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:04:10,962 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:10,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:10,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1250466899, now seen corresponding path program 1 times [2025-03-16 18:04:10,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:10,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527571072] [2025-03-16 18:04:10,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:10,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:10,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-16 18:04:10,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-16 18:04:10,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:10,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:11,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:11,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527571072] [2025-03-16 18:04:11,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527571072] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:04:11,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:04:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:04:11,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914654752] [2025-03-16 18:04:11,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:04:11,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:04:11,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:11,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:04:11,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:04:11,033 INFO L87 Difference]: Start difference. First operand 41 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:11,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:11,063 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2025-03-16 18:04:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:04:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2025-03-16 18:04:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:11,066 INFO L225 Difference]: With dead ends: 51 [2025-03-16 18:04:11,067 INFO L226 Difference]: Without dead ends: 42 [2025-03-16 18:04:11,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:04:11,068 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:11,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 128 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:04:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-03-16 18:04:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2025-03-16 18:04:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-16 18:04:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2025-03-16 18:04:11,084 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 12 [2025-03-16 18:04:11,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:11,084 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2025-03-16 18:04:11,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:11,084 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2025-03-16 18:04:11,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-03-16 18:04:11,086 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:11,087 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:11,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 18:04:11,087 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:11,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1378941817, now seen corresponding path program 1 times [2025-03-16 18:04:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:11,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299458890] [2025-03-16 18:04:11,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:11,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 18:04:11,099 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 18:04:11,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:11,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299458890] [2025-03-16 18:04:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299458890] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:04:11,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211662320] [2025-03-16 18:04:11,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:11,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:04:11,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:04:11,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 18:04:11,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-16 18:04:11,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-16 18:04:11,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:11,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:11,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 18:04:11,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:04:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:11,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:04:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:11,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211662320] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:04:11,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:04:11,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-16 18:04:11,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694214298] [2025-03-16 18:04:11,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:04:11,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 18:04:11,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:11,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 18:04:11,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:04:11,293 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:15,510 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 [] [2025-03-16 18:04:19,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 18:04:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:19,550 INFO L93 Difference]: Finished difference Result 97 states and 141 transitions. [2025-03-16 18:04:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:04:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-03-16 18:04:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:19,551 INFO L225 Difference]: With dead ends: 97 [2025-03-16 18:04:19,551 INFO L226 Difference]: Without dead ends: 78 [2025-03-16 18:04:19,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:04:19,552 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:19,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 175 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2025-03-16 18:04:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-16 18:04:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2025-03-16 18:04:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-16 18:04:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2025-03-16 18:04:19,565 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 14 [2025-03-16 18:04:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:19,565 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2025-03-16 18:04:19,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2025-03-16 18:04:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 18:04:19,566 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:19,566 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:19,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 18:04:19,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:19,767 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:19,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1143956549, now seen corresponding path program 1 times [2025-03-16 18:04:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050129372] [2025-03-16 18:04:19,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:19,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 18:04:19,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 18:04:19,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:19,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:19,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:19,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050129372] [2025-03-16 18:04:19,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050129372] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:04:19,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562349497] [2025-03-16 18:04:19,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:19,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:04:19,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:04:19,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 18:04:20,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 18:04:20,017 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 18:04:20,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:20,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:20,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 18:04:20,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:04:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:20,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:04:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:20,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562349497] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:04:20,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:04:20,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-03-16 18:04:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947133837] [2025-03-16 18:04:20,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:04:20,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 18:04:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:20,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 18:04:20,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:04:20,361 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:21,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:21,393 INFO L93 Difference]: Finished difference Result 145 states and 229 transitions. [2025-03-16 18:04:21,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:04:21,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 18:04:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:21,395 INFO L225 Difference]: With dead ends: 145 [2025-03-16 18:04:21,395 INFO L226 Difference]: Without dead ends: 122 [2025-03-16 18:04:21,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2025-03-16 18:04:21,396 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:21,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 239 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 18:04:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-03-16 18:04:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2025-03-16 18:04:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 53 states have internal predecessors, (63), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2025-03-16 18:04:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2025-03-16 18:04:21,409 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 15 [2025-03-16 18:04:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:21,409 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2025-03-16 18:04:21,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2025-03-16 18:04:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 18:04:21,410 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:21,410 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:21,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 18:04:21,615 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,SelfDestructingSolverStorable5 [2025-03-16 18:04:21,615 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:21,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1144522578, now seen corresponding path program 1 times [2025-03-16 18:04:21,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:21,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31391485] [2025-03-16 18:04:21,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:21,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 18:04:21,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 18:04:21,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:21,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:21,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31391485] [2025-03-16 18:04:21,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31391485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:04:21,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006014064] [2025-03-16 18:04:21,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:21,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:21,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:04:21,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:04:21,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 18:04:21,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 18:04:21,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 18:04:21,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:21,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:21,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:04:21,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:04:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:21,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:04:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:21,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006014064] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:04:21,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:04:21,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-03-16 18:04:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512019138] [2025-03-16 18:04:21,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:04:21,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:04:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:21,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:04:21,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:04:21,758 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:26,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 18:04:30,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-16 18:04:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:30,056 INFO L93 Difference]: Finished difference Result 140 states and 189 transitions. [2025-03-16 18:04:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:04:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 18:04:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:30,060 INFO L225 Difference]: With dead ends: 140 [2025-03-16 18:04:30,060 INFO L226 Difference]: Without dead ends: 130 [2025-03-16 18:04:30,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:04:30,061 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:30,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 185 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 79 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2025-03-16 18:04:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-03-16 18:04:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2025-03-16 18:04:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 77 states have internal predecessors, (89), 41 states have call successors, (41), 9 states have call predecessors, (41), 9 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2025-03-16 18:04:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 168 transitions. [2025-03-16 18:04:30,079 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 168 transitions. Word has length 15 [2025-03-16 18:04:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:30,079 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 168 transitions. [2025-03-16 18:04:30,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:04:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 168 transitions. [2025-03-16 18:04:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-03-16 18:04:30,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:30,080 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:30,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 18:04:30,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:30,281 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:30,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash -713396090, now seen corresponding path program 1 times [2025-03-16 18:04:30,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:30,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724079417] [2025-03-16 18:04:30,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:30,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:30,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-16 18:04:30,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 18:04:30,300 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:30,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:04:30,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821816077] [2025-03-16 18:04:30,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:30,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:30,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:04:30,305 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:04:30,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 18:04:30,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-16 18:04:30,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-16 18:04:30,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:30,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:30,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:04:30,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:04:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:04:30,391 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:04:30,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:30,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724079417] [2025-03-16 18:04:30,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:04:30,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821816077] [2025-03-16 18:04:30,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821816077] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:04:30,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:04:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:04:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038199566] [2025-03-16 18:04:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:04:30,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:04:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:30,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:04:30,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:04:30,394 INFO L87 Difference]: Start difference. First operand 123 states and 168 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 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) [2025-03-16 18:04:34,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:04:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:04:34,470 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2025-03-16 18:04:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:04:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 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 22 [2025-03-16 18:04:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:04:34,486 INFO L225 Difference]: With dead ends: 166 [2025-03-16 18:04:34,486 INFO L226 Difference]: Without dead ends: 159 [2025-03-16 18:04:34,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:04:34,487 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:04:34,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 116 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2025-03-16 18:04:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-03-16 18:04:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2025-03-16 18:04:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.2) internal successors, (108), 95 states have internal predecessors, (108), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2025-03-16 18:04:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 213 transitions. [2025-03-16 18:04:34,506 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 213 transitions. Word has length 22 [2025-03-16 18:04:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:04:34,506 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 213 transitions. [2025-03-16 18:04:34,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 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) [2025-03-16 18:04:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 213 transitions. [2025-03-16 18:04:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 18:04:34,507 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:04:34,507 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:04:34,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 18:04:34,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:34,712 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:04:34,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:04:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 994370494, now seen corresponding path program 1 times [2025-03-16 18:04:34,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:04:34,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853915587] [2025-03-16 18:04:34,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:34,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:04:34,716 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:04:34,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:04:34,727 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:34,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:04:34,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73067161] [2025-03-16 18:04:34,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:04:34,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:04:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:04:34,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:04:34,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 18:04:34,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-16 18:04:34,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 18:04:34,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:04:34,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:04:34,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 18:04:34,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:04:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:34,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:04:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:04:36,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:04:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853915587] [2025-03-16 18:04:36,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:04:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73067161] [2025-03-16 18:04:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73067161] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:04:36,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:04:36,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2025-03-16 18:04:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454117501] [2025-03-16 18:04:36,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:04:36,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 18:04:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:04:36,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 18:04:36,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:04:36,159 INFO L87 Difference]: Start difference. First operand 159 states and 213 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:04:44,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:04:50,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:04:56,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:00,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:04,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:08,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:13,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:17,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:19,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-16 18:05:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:05:19,725 INFO L93 Difference]: Finished difference Result 237 states and 321 transitions. [2025-03-16 18:05:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 18:05:19,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-03-16 18:05:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:05:19,730 INFO L225 Difference]: With dead ends: 237 [2025-03-16 18:05:19,730 INFO L226 Difference]: Without dead ends: 206 [2025-03-16 18:05:19,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:05:19,731 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 41 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 78 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.8s IncrementalHoareTripleChecker+Time [2025-03-16 18:05:19,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 341 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 199 Invalid, 8 Unknown, 0 Unchecked, 38.8s Time] [2025-03-16 18:05:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2025-03-16 18:05:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2025-03-16 18:05:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 113 states have (on average 1.176991150442478) internal successors, (133), 118 states have internal predecessors, (133), 66 states have call successors, (66), 19 states have call predecessors, (66), 18 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-16 18:05:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2025-03-16 18:05:19,770 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 23 [2025-03-16 18:05:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:05:19,770 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2025-03-16 18:05:19,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:05:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2025-03-16 18:05:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 18:05:19,771 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:05:19,771 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:05:19,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 18:05:19,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:05:19,973 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:05:19,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:05:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 715539494, now seen corresponding path program 2 times [2025-03-16 18:05:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:05:19,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931541909] [2025-03-16 18:05:19,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:05:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:05:19,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-16 18:05:19,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 11 of 23 statements. [2025-03-16 18:05:19,981 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 18:05:19,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:05:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 18:05:20,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:05:20,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931541909] [2025-03-16 18:05:20,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931541909] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:05:20,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:05:20,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:05:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447796966] [2025-03-16 18:05:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:05:20,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:05:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:05:20,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:05:20,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:05:20,032 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:05:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:05:20,107 INFO L93 Difference]: Finished difference Result 245 states and 321 transitions. [2025-03-16 18:05:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:05:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 18:05:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:05:20,108 INFO L225 Difference]: With dead ends: 245 [2025-03-16 18:05:20,108 INFO L226 Difference]: Without dead ends: 207 [2025-03-16 18:05:20,109 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 [2025-03-16 18:05:20,109 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:05:20,109 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:05:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2025-03-16 18:05:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2025-03-16 18:05:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 121 states have internal predecessors, (135), 66 states have call successors, (66), 20 states have call predecessors, (66), 19 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-16 18:05:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 262 transitions. [2025-03-16 18:05:20,150 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 262 transitions. Word has length 23 [2025-03-16 18:05:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:05:20,150 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 262 transitions. [2025-03-16 18:05:20,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 18:05:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 262 transitions. [2025-03-16 18:05:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-16 18:05:20,152 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:05:20,152 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:05:20,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-16 18:05:20,152 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:05:20,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:05:20,154 INFO L85 PathProgramCache]: Analyzing trace with hash 382302993, now seen corresponding path program 1 times [2025-03-16 18:05:20,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:05:20,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480293301] [2025-03-16 18:05:20,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:05:20,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:05:20,158 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:05:20,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:05:20,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:05:20,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:05:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:05:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:05:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480293301] [2025-03-16 18:05:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480293301] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:05:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64282251] [2025-03-16 18:05:20,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:05:20,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:05:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:05:20,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:05:20,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 18:05:20,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-16 18:05:20,273 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-16 18:05:20,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:05:20,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:05:20,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:05:20,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:05:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:05:20,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:05:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 18:05:20,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64282251] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:05:20,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:05:20,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2025-03-16 18:05:20,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770450633] [2025-03-16 18:05:20,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:05:20,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 18:05:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:05:20,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 18:05:20,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:05:20,364 INFO L87 Difference]: Start difference. First operand 202 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:05:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:05:20,783 INFO L93 Difference]: Finished difference Result 223 states and 281 transitions. [2025-03-16 18:05:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 18:05:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2025-03-16 18:05:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:05:20,784 INFO L225 Difference]: With dead ends: 223 [2025-03-16 18:05:20,784 INFO L226 Difference]: Without dead ends: 211 [2025-03-16 18:05:20,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2025-03-16 18:05:20,785 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 18:05:20,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 18:05:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-03-16 18:05:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2025-03-16 18:05:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 123 states have internal predecessors, (137), 66 states have call successors, (66), 20 states have call predecessors, (66), 19 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2025-03-16 18:05:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 264 transitions. [2025-03-16 18:05:20,804 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 264 transitions. Word has length 28 [2025-03-16 18:05:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:05:20,804 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 264 transitions. [2025-03-16 18:05:20,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:05:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 264 transitions. [2025-03-16 18:05:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 18:05:20,805 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:05:20,805 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:05:20,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 18:05:21,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:05:21,006 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:05:21,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:05:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash 503669425, now seen corresponding path program 1 times [2025-03-16 18:05:21,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:05:21,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650632836] [2025-03-16 18:05:21,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:05:21,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:05:21,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:05:21,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:05:21,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:05:21,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:05:21,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014725070] [2025-03-16 18:05:21,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:05:21,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:05:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:05:21,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:05:21,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 18:05:21,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:05:21,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:05:21,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:05:21,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:05:21,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:05:21,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:05:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-16 18:05:21,170 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:05:21,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:05:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650632836] [2025-03-16 18:05:21,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:05:21,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014725070] [2025-03-16 18:05:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014725070] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:05:21,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:05:21,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:05:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76878414] [2025-03-16 18:05:21,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:05:21,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:05:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:05:21,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:05:21,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:05:21,171 INFO L87 Difference]: Start difference. First operand 204 states and 264 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:05:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:05:21,345 INFO L93 Difference]: Finished difference Result 234 states and 305 transitions. [2025-03-16 18:05:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:05:21,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2025-03-16 18:05:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:05:21,347 INFO L225 Difference]: With dead ends: 234 [2025-03-16 18:05:21,347 INFO L226 Difference]: Without dead ends: 186 [2025-03-16 18:05:21,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:05:21,348 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:05:21,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 98 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:05:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2025-03-16 18:05:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 178. [2025-03-16 18:05:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 103 states have internal predecessors, (116), 62 states have call successors, (62), 16 states have call predecessors, (62), 16 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2025-03-16 18:05:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 236 transitions. [2025-03-16 18:05:21,362 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 236 transitions. Word has length 29 [2025-03-16 18:05:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:05:21,362 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 236 transitions. [2025-03-16 18:05:21,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-16 18:05:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 236 transitions. [2025-03-16 18:05:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 18:05:21,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:05:21,363 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2025-03-16 18:05:21,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 18:05:21,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:05:21,563 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:05:21,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:05:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1216150446, now seen corresponding path program 1 times [2025-03-16 18:05:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:05:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552156893] [2025-03-16 18:05:21,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:05:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:05:21,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 18:05:21,590 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 18:05:21,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:05:21,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:05:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-16 18:05:22,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:05:22,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552156893] [2025-03-16 18:05:22,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552156893] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:05:22,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650637288] [2025-03-16 18:05:22,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:05:22,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:05:22,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:05:22,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 18:05:22,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 18:05:22,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 18:05:22,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 18:05:22,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:05:22,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:05:22,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 18:05:22,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:05:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-16 18:05:24,924 INFO L312 TraceCheckSpWp]: Computing backward predicates...