./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:02:21,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:02:21,182 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:02:21,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:02:21,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:02:21,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:02:21,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:02:21,203 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:02:21,204 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:02:21,204 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:02:21,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:02:21,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:02:21,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:02:21,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:02:21,204 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:02:21,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:02:21,205 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:02:21,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:02:21,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:02:21,206 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2025-03-08 05:02:21,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:02:21,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:02:21,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:02:21,443 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:02:21,444 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:02:21,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2025-03-08 05:02:22,558 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4bc33a96/e4a9e66d0d2a4dde9ffe5f133810a0cf/FLAGa1eac154e [2025-03-08 05:02:22,761 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:02:22,761 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2025-03-08 05:02:22,766 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4bc33a96/e4a9e66d0d2a4dde9ffe5f133810a0cf/FLAGa1eac154e [2025-03-08 05:02:23,149 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4bc33a96/e4a9e66d0d2a4dde9ffe5f133810a0cf [2025-03-08 05:02:23,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:02:23,152 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:02:23,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:02:23,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:02:23,157 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:02:23,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d0cd193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23, skipping insertion in model container [2025-03-08 05:02:23,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,170 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:02:23,255 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2025-03-08 05:02:23,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:02:23,274 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:02:23,283 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2025-03-08 05:02:23,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:02:23,303 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:02:23,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23 WrapperNode [2025-03-08 05:02:23,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:02:23,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:02:23,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:02:23,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:02:23,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,326 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2025-03-08 05:02:23,327 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:02:23,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:02:23,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:02:23,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:02:23,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,346 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 05:02:23,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,348 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:02:23,351 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:02:23,351 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:02:23,351 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:02:23,351 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (1/1) ... [2025-03-08 05:02:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:02:23,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:23,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:02:23,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:02:23,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:02:23,390 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 05:02:23,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 05:02:23,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:02:23,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:02:23,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:02:23,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-08 05:02:23,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-08 05:02:23,428 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:02:23,430 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:02:23,543 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-08 05:02:23,543 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:02:23,548 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:02:23,548 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:02:23,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:02:23 BoogieIcfgContainer [2025-03-08 05:02:23,549 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:02:23,551 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:02:23,551 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:02:23,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:02:23,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:02:23" (1/3) ... [2025-03-08 05:02:23,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:02:23, skipping insertion in model container [2025-03-08 05:02:23,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:02:23" (2/3) ... [2025-03-08 05:02:23,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:02:23, skipping insertion in model container [2025-03-08 05:02:23,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:02:23" (3/3) ... [2025-03-08 05:02:23,556 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2025-03-08 05:02:23,566 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:02:23,567 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound100.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 05:02:23,607 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:02:23,618 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;@15e0fa96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:02:23,618 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:02:23,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-08 05:02:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 05:02:23,626 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:23,626 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:23,627 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:23,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:23,631 INFO L85 PathProgramCache]: Analyzing trace with hash -743363080, now seen corresponding path program 1 times [2025-03-08 05:02:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:23,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418247083] [2025-03-08 05:02:23,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:23,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 05:02:23,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 05:02:23,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:23,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 05:02:23,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:23,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418247083] [2025-03-08 05:02:23,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418247083] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:23,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846388928] [2025-03-08 05:02:23,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:23,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:23,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:23,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:23,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:02:23,793 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 05:02:23,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 05:02:23,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:23,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:23,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 05:02:23,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-08 05:02:23,838 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:02:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846388928] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:02:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:02:23,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 05:02:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020082782] [2025-03-08 05:02:23,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:23,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 05:02:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:23,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 05:02:23,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:02:23,858 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:02:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:23,875 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2025-03-08 05:02:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 05:02:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2025-03-08 05:02:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:23,881 INFO L225 Difference]: With dead ends: 61 [2025-03-08 05:02:23,882 INFO L226 Difference]: Without dead ends: 28 [2025-03-08 05:02:23,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 05:02:23,886 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:23,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:02:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-08 05:02:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-08 05:02:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:02:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-08 05:02:23,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2025-03-08 05:02:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:23,912 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-08 05:02:23,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:02:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-08 05:02:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-08 05:02:23,913 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:23,913 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:23,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:02:24,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 05:02:24,114 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:24,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090086, now seen corresponding path program 1 times [2025-03-08 05:02:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:24,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921807972] [2025-03-08 05:02:24,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:24,120 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 05:02:24,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 05:02:24,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:24,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:02:24,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:24,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921807972] [2025-03-08 05:02:24,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921807972] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:02:24,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:02:24,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 05:02:24,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075134487] [2025-03-08 05:02:24,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:24,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 05:02:24,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:24,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 05:02:24,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:02:24,308 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:24,377 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2025-03-08 05:02:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:02:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-03-08 05:02:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:24,378 INFO L225 Difference]: With dead ends: 44 [2025-03-08 05:02:24,378 INFO L226 Difference]: Without dead ends: 37 [2025-03-08 05:02:24,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:02:24,380 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:24,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:02:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-08 05:02:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2025-03-08 05:02:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-08 05:02:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2025-03-08 05:02:24,391 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2025-03-08 05:02:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:24,391 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2025-03-08 05:02:24,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2025-03-08 05:02:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-08 05:02:24,391 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:24,391 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:24,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:02:24,392 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:24,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -602638456, now seen corresponding path program 1 times [2025-03-08 05:02:24,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:24,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451464784] [2025-03-08 05:02:24,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:24,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 05:02:24,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 05:02:24,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:24,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:24,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669409974] [2025-03-08 05:02:24,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:24,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:24,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:24,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:02:24,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 05:02:24,481 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 05:02:24,481 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:24,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:24,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:02:24,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:02:24,562 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:02:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:24,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451464784] [2025-03-08 05:02:24,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669409974] [2025-03-08 05:02:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669409974] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:02:24,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:02:24,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:02:24,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933501642] [2025-03-08 05:02:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:24,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:02:24,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:24,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:02:24,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:02:24,566 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:24,617 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2025-03-08 05:02:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:02:24,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2025-03-08 05:02:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:24,619 INFO L225 Difference]: With dead ends: 43 [2025-03-08 05:02:24,619 INFO L226 Difference]: Without dead ends: 41 [2025-03-08 05:02:24,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:02:24,620 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:24,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:02:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-08 05:02:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-03-08 05:02:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2025-03-08 05:02:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2025-03-08 05:02:24,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2025-03-08 05:02:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:24,630 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2025-03-08 05:02:24,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2025-03-08 05:02:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-08 05:02:24,631 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:24,631 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:24,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:02:24,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-08 05:02:24,831 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:24,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1811518815, now seen corresponding path program 1 times [2025-03-08 05:02:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375609573] [2025-03-08 05:02:24,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:24,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:02:24,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:02:24,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:24,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:02:25,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:25,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375609573] [2025-03-08 05:02:25,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375609573] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:25,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578842035] [2025-03-08 05:02:25,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:25,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:25,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:25,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:02:25,051 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 05:02:25,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 05:02:25,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:25,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:25,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 05:02:25,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:02:25,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-08 05:02:25,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578842035] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:25,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:02:25,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2025-03-08 05:02:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378129425] [2025-03-08 05:02:25,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:25,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:02:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:25,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:02:25,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:02:25,212 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:02:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:25,364 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2025-03-08 05:02:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:02:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2025-03-08 05:02:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:25,365 INFO L225 Difference]: With dead ends: 82 [2025-03-08 05:02:25,365 INFO L226 Difference]: Without dead ends: 75 [2025-03-08 05:02:25,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:02:25,366 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:25,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:02:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-03-08 05:02:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2025-03-08 05:02:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-08 05:02:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2025-03-08 05:02:25,375 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2025-03-08 05:02:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:25,375 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2025-03-08 05:02:25,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-08 05:02:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2025-03-08 05:02:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-08 05:02:25,376 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:25,376 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:25,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:02:25,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:25,576 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:25,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 356055075, now seen corresponding path program 1 times [2025-03-08 05:02:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476418676] [2025-03-08 05:02:25,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:25,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 05:02:25,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 05:02:25,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:25,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:25,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151436427] [2025-03-08 05:02:25,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:25,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:25,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:25,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:25,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:02:25,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 05:02:25,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 05:02:25,638 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:25,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:25,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 05:02:25,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:02:25,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:02:25,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:25,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476418676] [2025-03-08 05:02:25,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:25,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151436427] [2025-03-08 05:02:25,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151436427] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:25,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:25,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-08 05:02:25,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432602574] [2025-03-08 05:02:25,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:25,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:02:25,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:25,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:02:25,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:02:25,810 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:25,920 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2025-03-08 05:02:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:02:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-03-08 05:02:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:25,923 INFO L225 Difference]: With dead ends: 83 [2025-03-08 05:02:25,923 INFO L226 Difference]: Without dead ends: 81 [2025-03-08 05:02:25,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:02:25,924 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:25,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 246 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:02:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-08 05:02:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2025-03-08 05:02:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-08 05:02:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2025-03-08 05:02:25,943 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2025-03-08 05:02:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:25,944 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2025-03-08 05:02:25,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2025-03-08 05:02:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 05:02:25,945 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:25,945 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:25,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 05:02:26,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:26,146 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:26,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -737481304, now seen corresponding path program 2 times [2025-03-08 05:02:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:26,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981043553] [2025-03-08 05:02:26,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:26,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-08 05:02:26,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:02:26,161 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:26,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:02:26,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981043553] [2025-03-08 05:02:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981043553] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:02:26,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:02:26,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:02:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201938126] [2025-03-08 05:02:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:26,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:02:26,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:26,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:02:26,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:02:26,232 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:26,321 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2025-03-08 05:02:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 05:02:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2025-03-08 05:02:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:26,322 INFO L225 Difference]: With dead ends: 116 [2025-03-08 05:02:26,322 INFO L226 Difference]: Without dead ends: 87 [2025-03-08 05:02:26,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:02:26,323 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:26,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:02:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-08 05:02:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2025-03-08 05:02:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2025-03-08 05:02:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2025-03-08 05:02:26,333 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2025-03-08 05:02:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:26,333 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2025-03-08 05:02:26,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-08 05:02:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2025-03-08 05:02:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-08 05:02:26,334 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:26,334 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:26,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 05:02:26,334 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:26,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash 437747302, now seen corresponding path program 1 times [2025-03-08 05:02:26,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:26,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761762595] [2025-03-08 05:02:26,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:26,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:26,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:02:26,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:02:26,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:26,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:26,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759242246] [2025-03-08 05:02:26,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:26,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:26,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:26,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:26,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:02:26,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 05:02:26,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 05:02:26,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:26,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:26,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 05:02:26,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-08 05:02:26,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:26,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761762595] [2025-03-08 05:02:26,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759242246] [2025-03-08 05:02:26,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759242246] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:26,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:02:26,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-08 05:02:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293562541] [2025-03-08 05:02:26,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:26,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 05:02:26,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:26,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 05:02:26,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:02:26,527 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 05:02:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:26,644 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2025-03-08 05:02:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:02:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2025-03-08 05:02:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:26,645 INFO L225 Difference]: With dead ends: 79 [2025-03-08 05:02:26,645 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 05:02:26,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:02:26,646 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:26,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:02:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 05:02:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2025-03-08 05:02:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2025-03-08 05:02:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2025-03-08 05:02:26,663 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2025-03-08 05:02:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:26,663 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2025-03-08 05:02:26,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-08 05:02:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2025-03-08 05:02:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-08 05:02:26,664 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:26,664 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:26,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:02:26,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:26,865 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:26,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1953213885, now seen corresponding path program 1 times [2025-03-08 05:02:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720002665] [2025-03-08 05:02:26,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:26,870 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 05:02:26,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 05:02:26,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:26,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:26,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453471420] [2025-03-08 05:02:26,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:26,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:26,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:26,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:26,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:02:26,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 05:02:26,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 05:02:26,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:26,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:26,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:02:26,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2025-03-08 05:02:26,947 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:02:26,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720002665] [2025-03-08 05:02:26,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:26,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453471420] [2025-03-08 05:02:26,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453471420] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:02:26,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:02:26,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:02:26,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676200146] [2025-03-08 05:02:26,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:26,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:02:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:26,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:02:26,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:02:26,949 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:02:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:26,999 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2025-03-08 05:02:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:02:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2025-03-08 05:02:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:27,000 INFO L225 Difference]: With dead ends: 104 [2025-03-08 05:02:27,000 INFO L226 Difference]: Without dead ends: 102 [2025-03-08 05:02:27,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:02:27,001 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:27,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:02:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2025-03-08 05:02:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2025-03-08 05:02:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2025-03-08 05:02:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2025-03-08 05:02:27,015 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2025-03-08 05:02:27,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:27,015 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2025-03-08 05:02:27,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-08 05:02:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2025-03-08 05:02:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-08 05:02:27,016 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:27,016 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:27,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:27,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:27,220 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:27,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -762809663, now seen corresponding path program 1 times [2025-03-08 05:02:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:27,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147300964] [2025-03-08 05:02:27,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:27,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:27,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 05:02:27,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 05:02:27,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:27,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567847594] [2025-03-08 05:02:27,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:27,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:27,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:02:27,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 05:02:27,270 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 05:02:27,270 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:27,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:27,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 05:02:27,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 05:02:27,301 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 05:02:27,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:27,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147300964] [2025-03-08 05:02:27,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:27,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567847594] [2025-03-08 05:02:27,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567847594] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:02:27,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:02:27,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:02:27,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164902917] [2025-03-08 05:02:27,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:27,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:02:27,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:27,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:02:27,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:02:27,303 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 05:02:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:27,357 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2025-03-08 05:02:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:02:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2025-03-08 05:02:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:27,360 INFO L225 Difference]: With dead ends: 148 [2025-03-08 05:02:27,360 INFO L226 Difference]: Without dead ends: 146 [2025-03-08 05:02:27,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 05:02:27,361 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:27,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:02:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-03-08 05:02:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2025-03-08 05:02:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2025-03-08 05:02:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2025-03-08 05:02:27,386 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2025-03-08 05:02:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:27,386 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2025-03-08 05:02:27,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-08 05:02:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2025-03-08 05:02:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-08 05:02:27,387 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:27,388 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:27,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:27,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:27,588 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:27,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash 17136405, now seen corresponding path program 1 times [2025-03-08 05:02:27,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:27,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289603470] [2025-03-08 05:02:27,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:27,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 05:02:27,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:02:27,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:27,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:27,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329259208] [2025-03-08 05:02:27,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:27,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:27,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:27,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:27,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:02:27,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 05:02:27,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 05:02:27,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:27,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:27,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-08 05:02:27,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-08 05:02:28,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-03-08 05:02:28,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:28,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289603470] [2025-03-08 05:02:28,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329259208] [2025-03-08 05:02:28,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329259208] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:28,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:28,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-08 05:02:28,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282578067] [2025-03-08 05:02:28,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:28,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:02:28,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:28,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:02:28,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:02:28,467 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-08 05:02:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:30,492 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2025-03-08 05:02:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 05:02:30,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2025-03-08 05:02:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:30,496 INFO L225 Difference]: With dead ends: 358 [2025-03-08 05:02:30,496 INFO L226 Difference]: Without dead ends: 276 [2025-03-08 05:02:30,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-08 05:02:30,500 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:30,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-08 05:02:30,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2025-03-08 05:02:30,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2025-03-08 05:02:30,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-08 05:02:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2025-03-08 05:02:30,567 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2025-03-08 05:02:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:30,567 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2025-03-08 05:02:30,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-08 05:02:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2025-03-08 05:02:30,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-08 05:02:30,568 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:30,568 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:30,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 05:02:30,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:02:30,772 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:30,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1304203768, now seen corresponding path program 1 times [2025-03-08 05:02:30,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:30,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323707806] [2025-03-08 05:02:30,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:30,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 05:02:30,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 05:02:30,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:30,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:30,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505265048] [2025-03-08 05:02:30,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:30,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:30,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:30,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:30,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:02:30,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-08 05:02:30,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-08 05:02:30,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:30,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:30,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-08 05:02:30,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 05:02:31,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-08 05:02:31,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323707806] [2025-03-08 05:02:31,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505265048] [2025-03-08 05:02:31,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505265048] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:31,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:31,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2025-03-08 05:02:31,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687309521] [2025-03-08 05:02:31,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:31,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:02:31,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:31,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:02:31,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:02:31,294 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-08 05:02:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:32,414 INFO L93 Difference]: Finished difference Result 255 states and 394 transitions. [2025-03-08 05:02:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:02:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 59 [2025-03-08 05:02:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:32,417 INFO L225 Difference]: With dead ends: 255 [2025-03-08 05:02:32,417 INFO L226 Difference]: Without dead ends: 253 [2025-03-08 05:02:32,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 05:02:32,419 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 90 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:32,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-08 05:02:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-03-08 05:02:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2025-03-08 05:02:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 112 states have internal predecessors, (136), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-08 05:02:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2025-03-08 05:02:32,497 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 59 [2025-03-08 05:02:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:32,497 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2025-03-08 05:02:32,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-08 05:02:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2025-03-08 05:02:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-08 05:02:32,498 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:32,498 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:32,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:32,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:32,698 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:32,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1091825569, now seen corresponding path program 2 times [2025-03-08 05:02:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:32,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942079562] [2025-03-08 05:02:32,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:32,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-08 05:02:32,727 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 05:02:32,727 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:32,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:32,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933093786] [2025-03-08 05:02:32,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:32,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:32,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:32,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:02:32,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 64 statements into 2 equivalence classes. [2025-03-08 05:02:32,782 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 64 of 64 statements. [2025-03-08 05:02:32,782 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:32,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:32,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-03-08 05:02:32,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2025-03-08 05:02:33,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2025-03-08 05:02:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942079562] [2025-03-08 05:02:33,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933093786] [2025-03-08 05:02:33,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933093786] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:33,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:33,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2025-03-08 05:02:33,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775534761] [2025-03-08 05:02:33,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:33,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 05:02:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:33,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 05:02:33,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:02:33,784 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-08 05:02:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:37,396 INFO L93 Difference]: Finished difference Result 388 states and 583 transitions. [2025-03-08 05:02:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-08 05:02:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 64 [2025-03-08 05:02:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:37,398 INFO L225 Difference]: With dead ends: 388 [2025-03-08 05:02:37,398 INFO L226 Difference]: Without dead ends: 327 [2025-03-08 05:02:37,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=678, Invalid=2862, Unknown=0, NotChecked=0, Total=3540 [2025-03-08 05:02:37,400 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:37,400 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 368 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2025-03-08 05:02:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2025-03-08 05:02:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 280. [2025-03-08 05:02:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 139 states have (on average 1.2805755395683454) internal successors, (178), 150 states have internal predecessors, (178), 121 states have call successors, (121), 19 states have call predecessors, (121), 19 states have return successors, (120), 110 states have call predecessors, (120), 120 states have call successors, (120) [2025-03-08 05:02:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 419 transitions. [2025-03-08 05:02:37,516 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 419 transitions. Word has length 64 [2025-03-08 05:02:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:37,516 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 419 transitions. [2025-03-08 05:02:37,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 27 states have internal predecessors, (46), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2025-03-08 05:02:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 419 transitions. [2025-03-08 05:02:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-08 05:02:37,517 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:37,517 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:37,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:02:37,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 05:02:37,718 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:37,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1883736123, now seen corresponding path program 1 times [2025-03-08 05:02:37,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:37,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503028799] [2025-03-08 05:02:37,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:37,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:37,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-08 05:02:37,733 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 05:02:37,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:37,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:37,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412237695] [2025-03-08 05:02:37,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:37,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:37,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:37,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:02:37,760 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 79 statements into 1 equivalence classes. [2025-03-08 05:02:37,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 79 of 79 statements. [2025-03-08 05:02:37,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:37,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:37,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 66 conjuncts are in the unsatisfiable core [2025-03-08 05:02:37,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-08 05:02:38,414 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:38,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:38,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503028799] [2025-03-08 05:02:38,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412237695] [2025-03-08 05:02:38,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412237695] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:38,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:02:38,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-08 05:02:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454253148] [2025-03-08 05:02:38,855 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:38,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:02:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:38,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:02:38,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2025-03-08 05:02:38,857 INFO L87 Difference]: Start difference. First operand 280 states and 419 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-08 05:02:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:39,678 INFO L93 Difference]: Finished difference Result 357 states and 538 transitions. [2025-03-08 05:02:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 05:02:39,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2025-03-08 05:02:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:39,681 INFO L225 Difference]: With dead ends: 357 [2025-03-08 05:02:39,681 INFO L226 Difference]: Without dead ends: 350 [2025-03-08 05:02:39,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:02:39,682 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:39,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 431 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:02:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-08 05:02:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2025-03-08 05:02:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 163 states have (on average 1.294478527607362) internal successors, (211), 177 states have internal predecessors, (211), 157 states have call successors, (157), 22 states have call predecessors, (157), 22 states have return successors, (156), 143 states have call predecessors, (156), 156 states have call successors, (156) [2025-03-08 05:02:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2025-03-08 05:02:39,818 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 79 [2025-03-08 05:02:39,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:39,818 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2025-03-08 05:02:39,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-08 05:02:39,818 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2025-03-08 05:02:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-08 05:02:39,819 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:39,819 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:40,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 05:02:40,020 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:40,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1658792811, now seen corresponding path program 2 times [2025-03-08 05:02:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:40,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072942898] [2025-03-08 05:02:40,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:40,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-08 05:02:40,032 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 05:02:40,032 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:40,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-08 05:02:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072942898] [2025-03-08 05:02:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072942898] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:40,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849015532] [2025-03-08 05:02:40,182 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:40,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:40,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:40,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:40,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:02:40,207 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-08 05:02:40,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-08 05:02:40,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:40,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:40,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:02:40,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-08 05:02:40,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-08 05:02:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849015532] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:40,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:02:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2025-03-08 05:02:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242134565] [2025-03-08 05:02:40,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:40,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 05:02:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:40,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 05:02:40,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:02:40,351 INFO L87 Difference]: Start difference. First operand 343 states and 524 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-08 05:02:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:40,780 INFO L93 Difference]: Finished difference Result 580 states and 882 transitions. [2025-03-08 05:02:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:02:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2025-03-08 05:02:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:40,783 INFO L225 Difference]: With dead ends: 580 [2025-03-08 05:02:40,783 INFO L226 Difference]: Without dead ends: 357 [2025-03-08 05:02:40,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:02:40,784 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:40,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 331 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:02:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2025-03-08 05:02:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 262. [2025-03-08 05:02:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 139 states have internal predecessors, (173), 103 states have call successors, (103), 21 states have call predecessors, (103), 21 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-08 05:02:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 378 transitions. [2025-03-08 05:02:40,876 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 378 transitions. Word has length 84 [2025-03-08 05:02:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:40,876 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 378 transitions. [2025-03-08 05:02:40,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-08 05:02:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 378 transitions. [2025-03-08 05:02:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-08 05:02:40,877 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:40,877 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:40,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:02:41,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 05:02:41,078 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:41,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash 996745083, now seen corresponding path program 1 times [2025-03-08 05:02:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:41,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428111509] [2025-03-08 05:02:41,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:41,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:41,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-08 05:02:41,090 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 05:02:41,090 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:41,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:41,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570076587] [2025-03-08 05:02:41,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:02:41,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:41,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:41,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:41,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:02:41,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-08 05:02:41,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-08 05:02:41,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:02:41,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:41,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 05:02:41,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-03-08 05:02:41,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2025-03-08 05:02:41,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:41,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428111509] [2025-03-08 05:02:41,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:41,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570076587] [2025-03-08 05:02:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570076587] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:41,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:02:41,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-08 05:02:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670416803] [2025-03-08 05:02:41,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:02:41,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:02:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:41,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:02:41,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-08 05:02:41,274 INFO L87 Difference]: Start difference. First operand 262 states and 378 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-08 05:02:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:41,383 INFO L93 Difference]: Finished difference Result 272 states and 386 transitions. [2025-03-08 05:02:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:02:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2025-03-08 05:02:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:41,385 INFO L225 Difference]: With dead ends: 272 [2025-03-08 05:02:41,385 INFO L226 Difference]: Without dead ends: 270 [2025-03-08 05:02:41,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:02:41,386 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:41,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:02:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-08 05:02:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2025-03-08 05:02:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 143 states have (on average 1.2517482517482517) internal successors, (179), 145 states have internal predecessors, (179), 103 states have call successors, (103), 23 states have call predecessors, (103), 23 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2025-03-08 05:02:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 384 transitions. [2025-03-08 05:02:41,471 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 384 transitions. Word has length 92 [2025-03-08 05:02:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:41,471 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 384 transitions. [2025-03-08 05:02:41,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2025-03-08 05:02:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 384 transitions. [2025-03-08 05:02:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-08 05:02:41,472 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:41,472 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:41,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:41,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 05:02:41,674 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:41,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1015960117, now seen corresponding path program 2 times [2025-03-08 05:02:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:41,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032359693] [2025-03-08 05:02:41,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:41,677 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-08 05:02:41,686 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 05:02:41,686 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:41,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:41,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612593744] [2025-03-08 05:02:41,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:02:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:41,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:41,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:41,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:02:41,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 97 statements into 2 equivalence classes. [2025-03-08 05:02:41,736 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 05:02:41,736 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:02:41,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:41,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 05:02:41,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-08 05:02:42,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-08 05:02:42,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032359693] [2025-03-08 05:02:42,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612593744] [2025-03-08 05:02:42,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612593744] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:42,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:42,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2025-03-08 05:02:42,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574768817] [2025-03-08 05:02:42,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:42,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:02:42,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:42,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:02:42,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:02:42,570 INFO L87 Difference]: Start difference. First operand 270 states and 384 transitions. Second operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-08 05:02:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:46,619 INFO L93 Difference]: Finished difference Result 459 states and 701 transitions. [2025-03-08 05:02:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-03-08 05:02:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 97 [2025-03-08 05:02:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:46,622 INFO L225 Difference]: With dead ends: 459 [2025-03-08 05:02:46,622 INFO L226 Difference]: Without dead ends: 451 [2025-03-08 05:02:46,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=867, Invalid=4103, Unknown=0, NotChecked=0, Total=4970 [2025-03-08 05:02:46,623 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 130 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:46,623 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 779 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-08 05:02:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2025-03-08 05:02:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 313. [2025-03-08 05:02:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 157 states have (on average 1.286624203821656) internal successors, (202), 159 states have internal predecessors, (202), 131 states have call successors, (131), 24 states have call predecessors, (131), 24 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2025-03-08 05:02:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 463 transitions. [2025-03-08 05:02:46,752 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 463 transitions. Word has length 97 [2025-03-08 05:02:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:46,752 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 463 transitions. [2025-03-08 05:02:46,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-08 05:02:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 463 transitions. [2025-03-08 05:02:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-08 05:02:46,753 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:46,753 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:46,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:02:46,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:46,954 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:46,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1295956566, now seen corresponding path program 3 times [2025-03-08 05:02:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:46,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688175370] [2025-03-08 05:02:46,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:02:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:46,958 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-08 05:02:46,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 99 of 99 statements. [2025-03-08 05:02:46,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-08 05:02:46,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:46,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868231782] [2025-03-08 05:02:46,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:02:46,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:46,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:46,983 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:46,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:02:47,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 99 statements into 11 equivalence classes. [2025-03-08 05:02:47,045 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 63 of 99 statements. [2025-03-08 05:02:47,045 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-08 05:02:47,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:47,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-03-08 05:02:47,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 80 proven. 29 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-03-08 05:02:47,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:48,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:48,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688175370] [2025-03-08 05:02:48,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:48,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868231782] [2025-03-08 05:02:48,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868231782] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:02:48,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:02:48,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2025-03-08 05:02:48,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813971601] [2025-03-08 05:02:48,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:48,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:02:48,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:48,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:02:48,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:02:48,477 INFO L87 Difference]: Start difference. First operand 313 states and 463 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-08 05:02:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:02:49,166 INFO L93 Difference]: Finished difference Result 391 states and 569 transitions. [2025-03-08 05:02:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 05:02:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 99 [2025-03-08 05:02:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:02:49,168 INFO L225 Difference]: With dead ends: 391 [2025-03-08 05:02:49,168 INFO L226 Difference]: Without dead ends: 384 [2025-03-08 05:02:49,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:02:49,169 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:02:49,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 251 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:02:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2025-03-08 05:02:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 374. [2025-03-08 05:02:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 189 states have (on average 1.2857142857142858) internal successors, (243), 191 states have internal predecessors, (243), 155 states have call successors, (155), 29 states have call predecessors, (155), 29 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2025-03-08 05:02:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 552 transitions. [2025-03-08 05:02:49,366 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 552 transitions. Word has length 99 [2025-03-08 05:02:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:02:49,367 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 552 transitions. [2025-03-08 05:02:49,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-08 05:02:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 552 transitions. [2025-03-08 05:02:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-08 05:02:49,368 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:02:49,368 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:02:49,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 05:02:49,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 05:02:49,568 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:02:49,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:02:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1346848239, now seen corresponding path program 4 times [2025-03-08 05:02:49,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:02:49,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920597309] [2025-03-08 05:02:49,569 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:02:49,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:02:49,573 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-08 05:02:49,588 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-08 05:02:49,588 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:02:49,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:02:49,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745671219] [2025-03-08 05:02:49,593 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:02:49,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:02:49,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:02:49,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:02:49,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:02:49,619 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 102 statements into 2 equivalence classes. [2025-03-08 05:02:49,642 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 97 of 102 statements. [2025-03-08 05:02:49,642 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:02:49,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:02:49,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 75 conjuncts are in the unsatisfiable core [2025-03-08 05:02:49,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:02:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2025-03-08 05:02:50,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:02:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2025-03-08 05:02:50,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:02:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920597309] [2025-03-08 05:02:50,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:02:50,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745671219] [2025-03-08 05:02:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745671219] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:02:50,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:02:50,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2025-03-08 05:02:50,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79944988] [2025-03-08 05:02:50,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:02:50,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 05:02:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:02:50,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 05:02:50,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:02:50,863 INFO L87 Difference]: Start difference. First operand 374 states and 552 transitions. Second operand has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-08 05:03:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:03:00,053 INFO L93 Difference]: Finished difference Result 619 states and 956 transitions. [2025-03-08 05:03:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2025-03-08 05:03:00,053 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 102 [2025-03-08 05:03:00,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:03:00,056 INFO L225 Difference]: With dead ends: 619 [2025-03-08 05:03:00,056 INFO L226 Difference]: Without dead ends: 611 [2025-03-08 05:03:00,059 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4040 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2038, Invalid=11534, Unknown=0, NotChecked=0, Total=13572 [2025-03-08 05:03:00,059 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 286 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:03:00,059 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 611 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2025-03-08 05:03:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2025-03-08 05:03:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 471. [2025-03-08 05:03:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 235 states have (on average 1.297872340425532) internal successors, (305), 237 states have internal predecessors, (305), 203 states have call successors, (203), 32 states have call predecessors, (203), 32 states have return successors, (202), 201 states have call predecessors, (202), 202 states have call successors, (202) [2025-03-08 05:03:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 710 transitions. [2025-03-08 05:03:00,340 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 710 transitions. Word has length 102 [2025-03-08 05:03:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:03:00,342 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 710 transitions. [2025-03-08 05:03:00,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2025-03-08 05:03:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 710 transitions. [2025-03-08 05:03:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-08 05:03:00,344 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:03:00,344 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:03:00,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:03:00,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 05:03:00,548 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:03:00,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:03:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1473706161, now seen corresponding path program 5 times [2025-03-08 05:03:00,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:03:00,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726311569] [2025-03-08 05:03:00,548 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:03:00,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:03:00,552 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-08 05:03:00,571 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-08 05:03:00,571 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-08 05:03:00,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:03:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891003154] [2025-03-08 05:03:00,576 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:03:00,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:00,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:03:00,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:03:00,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:03:00,605 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 102 statements into 11 equivalence classes. [2025-03-08 05:03:00,671 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 102 of 102 statements. [2025-03-08 05:03:00,671 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-03-08 05:03:00,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:03:00,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 74 conjuncts are in the unsatisfiable core [2025-03-08 05:03:00,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:03:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 43 proven. 67 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2025-03-08 05:03:01,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:03:04,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:03:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726311569] [2025-03-08 05:03:04,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:03:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891003154] [2025-03-08 05:03:04,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891003154] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:03:04,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:03:04,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-08 05:03:04,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547024492] [2025-03-08 05:03:04,572 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:03:04,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:03:04,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:03:04,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:03:04,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:03:04,573 INFO L87 Difference]: Start difference. First operand 471 states and 710 transitions. Second operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-08 05:03:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:03:05,999 INFO L93 Difference]: Finished difference Result 551 states and 823 transitions. [2025-03-08 05:03:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:03:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 102 [2025-03-08 05:03:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:03:06,002 INFO L225 Difference]: With dead ends: 551 [2025-03-08 05:03:06,002 INFO L226 Difference]: Without dead ends: 544 [2025-03-08 05:03:06,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:03:06,003 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 56 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 05:03:06,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 565 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 05:03:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2025-03-08 05:03:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 529. [2025-03-08 05:03:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 263 states have internal predecessors, (340), 231 states have call successors, (231), 36 states have call predecessors, (231), 36 states have return successors, (230), 229 states have call predecessors, (230), 230 states have call successors, (230) [2025-03-08 05:03:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 801 transitions. [2025-03-08 05:03:06,357 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 801 transitions. Word has length 102 [2025-03-08 05:03:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:03:06,357 INFO L471 AbstractCegarLoop]: Abstraction has 529 states and 801 transitions. [2025-03-08 05:03:06,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2025-03-08 05:03:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 801 transitions. [2025-03-08 05:03:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-08 05:03:06,358 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:03:06,358 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:03:06,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 05:03:06,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:06,559 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:03:06,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:03:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash -721263382, now seen corresponding path program 6 times [2025-03-08 05:03:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:03:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881663274] [2025-03-08 05:03:06,559 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:03:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:03:06,563 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-08 05:03:06,581 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 105 of 105 statements. [2025-03-08 05:03:06,581 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-08 05:03:06,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:03:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937962716] [2025-03-08 05:03:06,582 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:03:06,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:03:06,586 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:03:06,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:03:06,614 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 105 statements into 8 equivalence classes. [2025-03-08 05:03:06,776 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 87 of 105 statements. [2025-03-08 05:03:06,776 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:03:06,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:03:06,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-08 05:03:06,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:03:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 42 proven. 77 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2025-03-08 05:03:08,014 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:03:08,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:03:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881663274] [2025-03-08 05:03:08,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:03:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937962716] [2025-03-08 05:03:08,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937962716] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:03:08,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-08 05:03:08,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2025-03-08 05:03:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835672310] [2025-03-08 05:03:08,999 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-08 05:03:08,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:03:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:03:08,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:03:09,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:03:09,000 INFO L87 Difference]: Start difference. First operand 529 states and 801 transitions. Second operand has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-08 05:03:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:03:17,320 INFO L93 Difference]: Finished difference Result 717 states and 1096 transitions. [2025-03-08 05:03:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 05:03:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 105 [2025-03-08 05:03:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:03:17,325 INFO L225 Difference]: With dead ends: 717 [2025-03-08 05:03:17,325 INFO L226 Difference]: Without dead ends: 714 [2025-03-08 05:03:17,326 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 05:03:17,327 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 88 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:03:17,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 576 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2025-03-08 05:03:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2025-03-08 05:03:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 656. [2025-03-08 05:03:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 320 states have (on average 1.30625) internal successors, (418), 324 states have internal predecessors, (418), 291 states have call successors, (291), 44 states have call predecessors, (291), 44 states have return successors, (290), 287 states have call predecessors, (290), 290 states have call successors, (290) [2025-03-08 05:03:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 999 transitions. [2025-03-08 05:03:17,793 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 999 transitions. Word has length 105 [2025-03-08 05:03:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:03:17,793 INFO L471 AbstractCegarLoop]: Abstraction has 656 states and 999 transitions. [2025-03-08 05:03:17,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2025-03-08 05:03:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 999 transitions. [2025-03-08 05:03:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2025-03-08 05:03:17,795 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:03:17,795 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:03:17,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 05:03:17,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:17,999 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:03:17,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:03:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1862646870, now seen corresponding path program 2 times [2025-03-08 05:03:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:03:17,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455540443] [2025-03-08 05:03:17,999 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:03:17,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:03:18,003 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-08 05:03:18,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-08 05:03:18,013 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:03:18,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:03:18,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465770938] [2025-03-08 05:03:18,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:03:18,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:18,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:03:18,017 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:03:18,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:03:18,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 108 statements into 2 equivalence classes. [2025-03-08 05:03:18,070 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 108 of 108 statements. [2025-03-08 05:03:18,070 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:03:18,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:03:18,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-03-08 05:03:18,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:03:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2025-03-08 05:03:18,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:03:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2025-03-08 05:03:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:03:19,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455540443] [2025-03-08 05:03:19,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:03:19,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465770938] [2025-03-08 05:03:19,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465770938] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:03:19,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:03:19,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2025-03-08 05:03:19,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77868461] [2025-03-08 05:03:19,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:03:19,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-08 05:03:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:03:19,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-08 05:03:19,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:03:19,785 INFO L87 Difference]: Start difference. First operand 656 states and 999 transitions. Second operand has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-08 05:03:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:03:43,697 INFO L93 Difference]: Finished difference Result 1028 states and 1605 transitions. [2025-03-08 05:03:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2025-03-08 05:03:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 108 [2025-03-08 05:03:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:03:43,704 INFO L225 Difference]: With dead ends: 1028 [2025-03-08 05:03:43,704 INFO L226 Difference]: Without dead ends: 1026 [2025-03-08 05:03:43,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=2276, Invalid=9066, Unknown=0, NotChecked=0, Total=11342 [2025-03-08 05:03:43,708 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 218 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:03:43,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 773 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2025-03-08 05:03:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2025-03-08 05:03:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 878. [2025-03-08 05:03:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 422 states have (on average 1.3317535545023698) internal successors, (562), 427 states have internal predecessors, (562), 405 states have call successors, (405), 50 states have call predecessors, (405), 50 states have return successors, (404), 400 states have call predecessors, (404), 404 states have call successors, (404) [2025-03-08 05:03:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1371 transitions. [2025-03-08 05:03:44,524 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1371 transitions. Word has length 108 [2025-03-08 05:03:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:03:44,524 INFO L471 AbstractCegarLoop]: Abstraction has 878 states and 1371 transitions. [2025-03-08 05:03:44,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4) internal successors, (49), 32 states have internal predecessors, (49), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2025-03-08 05:03:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1371 transitions. [2025-03-08 05:03:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-08 05:03:44,526 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:03:44,526 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:03:44,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 05:03:44,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:44,726 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:03:44,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:03:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1816468747, now seen corresponding path program 7 times [2025-03-08 05:03:44,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:03:44,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770362078] [2025-03-08 05:03:44,727 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:03:44,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:03:44,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-08 05:03:44,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-08 05:03:44,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:03:44,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:03:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-08 05:03:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:03:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770362078] [2025-03-08 05:03:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770362078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:03:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850733496] [2025-03-08 05:03:44,833 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:03:44,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:03:44,835 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:03:44,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 05:03:44,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-08 05:03:44,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-08 05:03:44,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:03:44,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:03:44,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:03:44,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:03:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 236 proven. 15 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2025-03-08 05:03:44,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:03:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2025-03-08 05:03:45,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850733496] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:03:45,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:03:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2025-03-08 05:03:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960872486] [2025-03-08 05:03:45,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:03:45,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 05:03:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:03:45,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 05:03:45,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-08 05:03:45,055 INFO L87 Difference]: Start difference. First operand 878 states and 1371 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-08 05:03:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:03:46,162 INFO L93 Difference]: Finished difference Result 1512 states and 2379 transitions. [2025-03-08 05:03:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:03:46,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 120 [2025-03-08 05:03:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:03:46,171 INFO L225 Difference]: With dead ends: 1512 [2025-03-08 05:03:46,171 INFO L226 Difference]: Without dead ends: 1029 [2025-03-08 05:03:46,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 234 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:03:46,176 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:03:46,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 238 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:03:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2025-03-08 05:03:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 968. [2025-03-08 05:03:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 455 states have (on average 1.3362637362637362) internal successors, (608), 473 states have internal predecessors, (608), 462 states have call successors, (462), 50 states have call predecessors, (462), 50 states have return successors, (461), 444 states have call predecessors, (461), 461 states have call successors, (461) [2025-03-08 05:03:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1531 transitions. [2025-03-08 05:03:47,295 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1531 transitions. Word has length 120 [2025-03-08 05:03:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:03:47,295 INFO L471 AbstractCegarLoop]: Abstraction has 968 states and 1531 transitions. [2025-03-08 05:03:47,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2025-03-08 05:03:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1531 transitions. [2025-03-08 05:03:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2025-03-08 05:03:47,297 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:03:47,297 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:03:47,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 05:03:47,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-08 05:03:47,498 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:03:47,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:03:47,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1388475109, now seen corresponding path program 8 times [2025-03-08 05:03:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:03:47,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553036218] [2025-03-08 05:03:47,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:03:47,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:03:47,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-08 05:03:47,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-08 05:03:47,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:03:47,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 05:03:47,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022140920] [2025-03-08 05:03:47,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:03:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:03:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:03:47,518 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:03:47,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 05:03:47,548 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 121 statements into 2 equivalence classes. [2025-03-08 05:03:47,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 121 of 121 statements. [2025-03-08 05:03:47,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:03:47,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:03:47,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-08 05:03:47,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:03:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 40 proven. 83 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2025-03-08 05:03:48,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:03:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 34 proven. 80 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-03-08 05:03:49,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:03:49,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553036218] [2025-03-08 05:03:49,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 05:03:49,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022140920] [2025-03-08 05:03:49,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022140920] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:03:49,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 05:03:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2025-03-08 05:03:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457243698] [2025-03-08 05:03:49,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 05:03:49,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 05:03:49,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:03:49,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 05:03:49,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:03:49,318 INFO L87 Difference]: Start difference. First operand 968 states and 1531 transitions. Second operand has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2025-03-08 05:04:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:04:02,461 INFO L93 Difference]: Finished difference Result 1231 states and 1970 transitions. [2025-03-08 05:04:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-03-08 05:04:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 121 [2025-03-08 05:04:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:04:02,471 INFO L225 Difference]: With dead ends: 1231 [2025-03-08 05:04:02,471 INFO L226 Difference]: Without dead ends: 1223 [2025-03-08 05:04:02,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1792, Invalid=7520, Unknown=0, NotChecked=0, Total=9312 [2025-03-08 05:04:02,478 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 206 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:04:02,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 928 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2025-03-08 05:04:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states.