./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:03:28,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:03:28,652 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 14:03:28,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:03:28,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:03:28,681 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:03:28,682 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:03:28,682 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:03:28,683 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:03:28,683 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:03:28,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:03:28,683 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:03:28,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:03:28,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:03:28,684 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:03:28,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:03:28,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:03:28,684 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:03:28,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 14:03:28,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:03:28,685 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:03:28,686 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:03:28,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:03:28,686 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:03:28,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:03:28,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:28,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:03:28,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:03:28,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:03:28,687 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 -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2025-03-16 14:03:28,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:03:28,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:03:28,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:03:28,929 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:03:28,930 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:03:28,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2025-03-16 14:03:30,091 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daee9559e/1bcf0f4b75d34508851334cc4aee0485/FLAG7f5ef88b7 [2025-03-16 14:03:30,304 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:03:30,306 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2025-03-16 14:03:30,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daee9559e/1bcf0f4b75d34508851334cc4aee0485/FLAG7f5ef88b7 [2025-03-16 14:03:30,331 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daee9559e/1bcf0f4b75d34508851334cc4aee0485 [2025-03-16 14:03:30,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:03:30,335 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:03:30,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:30,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:03:30,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:03:30,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3205a1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30, skipping insertion in model container [2025-03-16 14:03:30,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,362 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:03:30,467 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/bitvector/soft_float_1-2a.c.cil.c[755,768] [2025-03-16 14:03:30,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:30,533 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:03:30,542 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/bitvector/soft_float_1-2a.c.cil.c[755,768] [2025-03-16 14:03:30,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:30,590 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:03:30,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30 WrapperNode [2025-03-16 14:03:30,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:30,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:30,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:03:30,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:03:30,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,621 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 190 [2025-03-16 14:03:30,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:30,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:03:30,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:03:30,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:03:30,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,631 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,645 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 14:03:30,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,652 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,654 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:03:30,655 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:03:30,655 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:03:30,656 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:03:30,656 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (1/1) ... [2025-03-16 14:03:30,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:30,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 14:03:30,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 14:03:30,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:03:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 14:03:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-16 14:03:30,697 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-16 14:03:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:03:30,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:03:30,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:03:30,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:03:30,741 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:03:30,744 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:03:31,033 INFO L? ?]: Removed 71 outVars from TransFormulas that were not future-live. [2025-03-16 14:03:31,034 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:03:31,058 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:03:31,058 INFO L336 CfgBuilder]: Removed 1 assume(true) statements. [2025-03-16 14:03:31,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:31 BoogieIcfgContainer [2025-03-16 14:03:31,058 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:03:31,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:03:31,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:03:31,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:03:31,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:03:30" (1/3) ... [2025-03-16 14:03:31,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da0a54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:31, skipping insertion in model container [2025-03-16 14:03:31,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:30" (2/3) ... [2025-03-16 14:03:31,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da0a54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:31, skipping insertion in model container [2025-03-16 14:03:31,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:31" (3/3) ... [2025-03-16 14:03:31,068 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2025-03-16 14:03:31,078 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:03:31,079 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_1-2a.c.cil.c that has 3 procedures, 91 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 14:03:31,122 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:03:31,132 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;@5a6580e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:03:31,133 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:03:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 82 states have internal predecessors, (126), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 14:03:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 14:03:31,144 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:31,144 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:03:31,145 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:31,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -754920390, now seen corresponding path program 1 times [2025-03-16 14:03:31,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:31,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360939384] [2025-03-16 14:03:31,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:31,207 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 14:03:31,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 14:03:31,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:31,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:31,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:31,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360939384] [2025-03-16 14:03:31,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360939384] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:31,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:31,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845266954] [2025-03-16 14:03:31,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:31,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:31,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:31,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:31,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:31,389 INFO L87 Difference]: Start difference. First operand has 91 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 82 states have internal predecessors, (126), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:31,460 INFO L93 Difference]: Finished difference Result 215 states and 347 transitions. [2025-03-16 14:03:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2025-03-16 14:03:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:31,467 INFO L225 Difference]: With dead ends: 215 [2025-03-16 14:03:31,467 INFO L226 Difference]: Without dead ends: 123 [2025-03-16 14:03:31,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:31,473 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 41 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:31,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 248 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-16 14:03:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2025-03-16 14:03:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 110 states have (on average 1.490909090909091) internal successors, (164), 112 states have internal predecessors, (164), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-03-16 14:03:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 183 transitions. [2025-03-16 14:03:31,505 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 183 transitions. Word has length 35 [2025-03-16 14:03:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:31,506 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 183 transitions. [2025-03-16 14:03:31,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 183 transitions. [2025-03-16 14:03:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 14:03:31,509 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:31,509 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-03-16 14:03:31,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 14:03:31,510 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:31,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash 162713565, now seen corresponding path program 1 times [2025-03-16 14:03:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:31,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030749884] [2025-03-16 14:03:31,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:31,536 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 14:03:31,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 14:03:31,556 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:31,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:31,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:31,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030749884] [2025-03-16 14:03:31,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030749884] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:31,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341219615] [2025-03-16 14:03:31,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:31,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:31,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:31,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:31,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:03:31,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 14:03:31,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 14:03:31,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:31,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:31,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 14:03:31,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:31,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341219615] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:32,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-16 14:03:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589466890] [2025-03-16 14:03:32,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:32,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:03:32,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:32,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:03:32,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:32,044 INFO L87 Difference]: Start difference. First operand 123 states and 183 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:32,261 INFO L93 Difference]: Finished difference Result 254 states and 383 transitions. [2025-03-16 14:03:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:32,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2025-03-16 14:03:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:32,263 INFO L225 Difference]: With dead ends: 254 [2025-03-16 14:03:32,264 INFO L226 Difference]: Without dead ends: 164 [2025-03-16 14:03:32,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:03:32,266 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 62 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:32,267 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1083 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-03-16 14:03:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2025-03-16 14:03:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 144 states have (on average 1.4652777777777777) internal successors, (211), 147 states have internal predecessors, (211), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2025-03-16 14:03:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 240 transitions. [2025-03-16 14:03:32,289 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 240 transitions. Word has length 35 [2025-03-16 14:03:32,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:32,290 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 240 transitions. [2025-03-16 14:03:32,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 240 transitions. [2025-03-16 14:03:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 14:03:32,292 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:32,292 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2025-03-16 14:03:32,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:32,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:32,494 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:32,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:32,495 INFO L85 PathProgramCache]: Analyzing trace with hash 585513260, now seen corresponding path program 1 times [2025-03-16 14:03:32,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:32,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207883733] [2025-03-16 14:03:32,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:32,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:32,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 14:03:32,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 14:03:32,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:32,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207883733] [2025-03-16 14:03:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207883733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349177791] [2025-03-16 14:03:32,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:32,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:32,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:03:32,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 14:03:32,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 14:03:32,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:32,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:32,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:03:32,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:32,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349177791] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:32,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:32,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-16 14:03:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781937043] [2025-03-16 14:03:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:32,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 14:03:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:32,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 14:03:32,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:32,758 INFO L87 Difference]: Start difference. First operand 161 states and 240 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:32,963 INFO L93 Difference]: Finished difference Result 365 states and 560 transitions. [2025-03-16 14:03:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:03:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2025-03-16 14:03:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:32,965 INFO L225 Difference]: With dead ends: 365 [2025-03-16 14:03:32,965 INFO L226 Difference]: Without dead ends: 243 [2025-03-16 14:03:32,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:32,966 INFO L435 NwaCegarLoop]: 150 mSDtfsCounter, 150 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:32,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1438 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:32,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-03-16 14:03:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2025-03-16 14:03:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 213 states have (on average 1.4225352112676057) internal successors, (303), 214 states have internal predecessors, (303), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (39), 26 states have call predecessors, (39), 21 states have call successors, (39) [2025-03-16 14:03:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 364 transitions. [2025-03-16 14:03:32,984 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 364 transitions. Word has length 38 [2025-03-16 14:03:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:32,984 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 364 transitions. [2025-03-16 14:03:32,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 364 transitions. [2025-03-16 14:03:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:32,986 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:32,986 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:32,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 14:03:33,193 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 [2025-03-16 14:03:33,193 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:33,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 90731484, now seen corresponding path program 1 times [2025-03-16 14:03:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:33,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028403933] [2025-03-16 14:03:33,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:33,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:33,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:33,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:33,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:33,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:33,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028403933] [2025-03-16 14:03:33,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028403933] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:33,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561359045] [2025-03-16 14:03:33,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:33,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:33,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:33,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:33,257 INFO L87 Difference]: Start difference. First operand 240 states and 364 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:33,287 INFO L93 Difference]: Finished difference Result 356 states and 538 transitions. [2025-03-16 14:03:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-03-16 14:03:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:33,289 INFO L225 Difference]: With dead ends: 356 [2025-03-16 14:03:33,289 INFO L226 Difference]: Without dead ends: 305 [2025-03-16 14:03:33,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:33,290 INFO L435 NwaCegarLoop]: 140 mSDtfsCounter, 39 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:33,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 395 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2025-03-16 14:03:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2025-03-16 14:03:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 276 states have (on average 1.4057971014492754) internal successors, (388), 276 states have internal predecessors, (388), 24 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (41), 28 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-16 14:03:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 453 transitions. [2025-03-16 14:03:33,313 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 453 transitions. Word has length 41 [2025-03-16 14:03:33,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:33,313 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 453 transitions. [2025-03-16 14:03:33,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 453 transitions. [2025-03-16 14:03:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:33,315 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:33,315 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:33,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-16 14:03:33,316 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:33,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1849348154, now seen corresponding path program 1 times [2025-03-16 14:03:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740989670] [2025-03-16 14:03:33,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:33,322 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:33,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:33,329 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:33,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:33,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740989670] [2025-03-16 14:03:33,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740989670] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:33,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:33,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:33,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100127936] [2025-03-16 14:03:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:33,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:33,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:33,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:33,378 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:33,379 INFO L87 Difference]: Start difference. First operand 305 states and 453 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:33,402 INFO L93 Difference]: Finished difference Result 314 states and 462 transitions. [2025-03-16 14:03:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:33,404 INFO L225 Difference]: With dead ends: 314 [2025-03-16 14:03:33,404 INFO L226 Difference]: Without dead ends: 307 [2025-03-16 14:03:33,404 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:33,405 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 0 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 363 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 [2025-03-16 14:03:33,405 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 363 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2025-03-16 14:03:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2025-03-16 14:03:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.4028776978417266) internal successors, (390), 278 states have internal predecessors, (390), 24 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (41), 28 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-16 14:03:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 455 transitions. [2025-03-16 14:03:33,419 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 455 transitions. Word has length 42 [2025-03-16 14:03:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:33,419 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 455 transitions. [2025-03-16 14:03:33,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 455 transitions. [2025-03-16 14:03:33,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:33,421 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:33,421 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:33,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 14:03:33,421 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:33,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -961844473, now seen corresponding path program 1 times [2025-03-16 14:03:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:33,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585259233] [2025-03-16 14:03:33,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:33,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:33,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:33,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:33,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:33,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:33,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:33,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585259233] [2025-03-16 14:03:33,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585259233] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:33,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:33,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:03:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590334808] [2025-03-16 14:03:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:33,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:33,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:33,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:33,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:33,470 INFO L87 Difference]: Start difference. First operand 307 states and 455 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:33,503 INFO L93 Difference]: Finished difference Result 314 states and 461 transitions. [2025-03-16 14:03:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:33,505 INFO L225 Difference]: With dead ends: 314 [2025-03-16 14:03:33,505 INFO L226 Difference]: Without dead ends: 307 [2025-03-16 14:03:33,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:33,508 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:33,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 483 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2025-03-16 14:03:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2025-03-16 14:03:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 276 states have (on average 1.3985507246376812) internal successors, (386), 276 states have internal predecessors, (386), 24 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (41), 28 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-16 14:03:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 451 transitions. [2025-03-16 14:03:33,521 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 451 transitions. Word has length 42 [2025-03-16 14:03:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:33,521 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 451 transitions. [2025-03-16 14:03:33,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 451 transitions. [2025-03-16 14:03:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:33,522 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:33,522 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:33,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-16 14:03:33,522 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:33,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:33,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1877002633, now seen corresponding path program 1 times [2025-03-16 14:03:33,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:33,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438279200] [2025-03-16 14:03:33,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:33,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:33,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:33,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:33,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:33,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:33,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438279200] [2025-03-16 14:03:33,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438279200] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:33,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169875692] [2025-03-16 14:03:33,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:33,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:33,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:33,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:03:33,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:33,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:33,695 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:33,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:33,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:03:33,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:33,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169875692] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:33,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:33,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 11 [2025-03-16 14:03:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044872827] [2025-03-16 14:03:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:33,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:33,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:33,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:33,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:33,779 INFO L87 Difference]: Start difference. First operand 305 states and 451 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:33,887 INFO L93 Difference]: Finished difference Result 443 states and 654 transitions. [2025-03-16 14:03:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:33,889 INFO L225 Difference]: With dead ends: 443 [2025-03-16 14:03:33,889 INFO L226 Difference]: Without dead ends: 400 [2025-03-16 14:03:33,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:33,890 INFO L435 NwaCegarLoop]: 152 mSDtfsCounter, 111 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:33,890 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 510 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2025-03-16 14:03:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 307. [2025-03-16 14:03:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.39568345323741) internal successors, (388), 278 states have internal predecessors, (388), 24 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (41), 28 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-16 14:03:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 453 transitions. [2025-03-16 14:03:33,900 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 453 transitions. Word has length 42 [2025-03-16 14:03:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:33,900 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 453 transitions. [2025-03-16 14:03:33,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 453 transitions. [2025-03-16 14:03:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:33,905 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:33,905 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:33,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 14:03:34,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:34,106 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1500330708, now seen corresponding path program 1 times [2025-03-16 14:03:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480895420] [2025-03-16 14:03:34,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:34,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:34,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480895420] [2025-03-16 14:03:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480895420] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:34,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419380467] [2025-03-16 14:03:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:34,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:34,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:34,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:34,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:34,190 INFO L87 Difference]: Start difference. First operand 307 states and 453 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:34,280 INFO L93 Difference]: Finished difference Result 651 states and 943 transitions. [2025-03-16 14:03:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:34,286 INFO L225 Difference]: With dead ends: 651 [2025-03-16 14:03:34,286 INFO L226 Difference]: Without dead ends: 431 [2025-03-16 14:03:34,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:34,287 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 32 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:34,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 642 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2025-03-16 14:03:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 430. [2025-03-16 14:03:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 397 states have (on average 1.3425692695214106) internal successors, (533), 393 states have internal predecessors, (533), 28 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (45), 38 states have call predecessors, (45), 27 states have call successors, (45) [2025-03-16 14:03:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 606 transitions. [2025-03-16 14:03:34,305 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 606 transitions. Word has length 42 [2025-03-16 14:03:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:34,306 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 606 transitions. [2025-03-16 14:03:34,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 606 transitions. [2025-03-16 14:03:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:34,307 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,307 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:34,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-16 14:03:34,307 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1387086121, now seen corresponding path program 1 times [2025-03-16 14:03:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093445897] [2025-03-16 14:03:34,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:34,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:34,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:34,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:34,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093445897] [2025-03-16 14:03:34,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093445897] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:34,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:34,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:34,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520932115] [2025-03-16 14:03:34,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:34,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:34,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:34,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:34,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:34,349 INFO L87 Difference]: Start difference. First operand 430 states and 606 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:34,384 INFO L93 Difference]: Finished difference Result 747 states and 1046 transitions. [2025-03-16 14:03:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:34,387 INFO L225 Difference]: With dead ends: 747 [2025-03-16 14:03:34,387 INFO L226 Difference]: Without dead ends: 683 [2025-03-16 14:03:34,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:34,387 INFO L435 NwaCegarLoop]: 154 mSDtfsCounter, 52 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:34,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 424 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2025-03-16 14:03:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 510. [2025-03-16 14:03:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 473 states have (on average 1.346723044397463) internal successors, (637), 469 states have internal predecessors, (637), 32 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (49), 42 states have call predecessors, (49), 31 states have call successors, (49) [2025-03-16 14:03:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 718 transitions. [2025-03-16 14:03:34,412 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 718 transitions. Word has length 42 [2025-03-16 14:03:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:34,412 INFO L471 AbstractCegarLoop]: Abstraction has 510 states and 718 transitions. [2025-03-16 14:03:34,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 718 transitions. [2025-03-16 14:03:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 14:03:34,414 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,415 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2025-03-16 14:03:34,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-16 14:03:34,415 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -671577410, now seen corresponding path program 1 times [2025-03-16 14:03:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023676475] [2025-03-16 14:03:34,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:03:34,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:03:34,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023676475] [2025-03-16 14:03:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023676475] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170589496] [2025-03-16 14:03:34,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:34,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:34,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:34,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:03:34,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-16 14:03:34,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 14:03:34,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:34,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:34,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-16 14:03:34,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:34,510 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:34,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170589496] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:34,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:34,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:03:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704019882] [2025-03-16 14:03:34,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:34,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:34,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:34,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:34,511 INFO L87 Difference]: Start difference. First operand 510 states and 718 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:34,541 INFO L93 Difference]: Finished difference Result 794 states and 1112 transitions. [2025-03-16 14:03:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2025-03-16 14:03:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:34,544 INFO L225 Difference]: With dead ends: 794 [2025-03-16 14:03:34,544 INFO L226 Difference]: Without dead ends: 696 [2025-03-16 14:03:34,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:34,545 INFO L435 NwaCegarLoop]: 146 mSDtfsCounter, 52 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:34,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 264 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2025-03-16 14:03:34,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 584. [2025-03-16 14:03:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 545 states have (on average 1.343119266055046) internal successors, (732), 540 states have internal predecessors, (732), 34 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (50), 43 states have call predecessors, (50), 32 states have call successors, (50) [2025-03-16 14:03:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 816 transitions. [2025-03-16 14:03:34,560 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 816 transitions. Word has length 43 [2025-03-16 14:03:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:34,560 INFO L471 AbstractCegarLoop]: Abstraction has 584 states and 816 transitions. [2025-03-16 14:03:34,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 816 transitions. [2025-03-16 14:03:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:34,561 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:34,562 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2025-03-16 14:03:34,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 14:03:34,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:34,766 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:34,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash 115940695, now seen corresponding path program 2 times [2025-03-16 14:03:34,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:34,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781423762] [2025-03-16 14:03:34,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:34,771 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-16 14:03:34,816 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 28 of 45 statements. [2025-03-16 14:03:34,816 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 14:03:34,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:35,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:35,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781423762] [2025-03-16 14:03:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781423762] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:35,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-16 14:03:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682455379] [2025-03-16 14:03:35,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:35,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:03:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:35,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:03:35,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:35,120 INFO L87 Difference]: Start difference. First operand 584 states and 816 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:35,380 INFO L93 Difference]: Finished difference Result 1323 states and 1874 transitions. [2025-03-16 14:03:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:03:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2025-03-16 14:03:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:35,387 INFO L225 Difference]: With dead ends: 1323 [2025-03-16 14:03:35,387 INFO L226 Difference]: Without dead ends: 1104 [2025-03-16 14:03:35,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:03:35,389 INFO L435 NwaCegarLoop]: 141 mSDtfsCounter, 150 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:35,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1462 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2025-03-16 14:03:35,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 968. [2025-03-16 14:03:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 903 states have (on average 1.3421926910299002) internal successors, (1212), 901 states have internal predecessors, (1212), 59 states have call successors, (59), 3 states have call predecessors, (59), 5 states have return successors, (75), 67 states have call predecessors, (75), 57 states have call successors, (75) [2025-03-16 14:03:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1346 transitions. [2025-03-16 14:03:35,427 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1346 transitions. Word has length 45 [2025-03-16 14:03:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:35,427 INFO L471 AbstractCegarLoop]: Abstraction has 968 states and 1346 transitions. [2025-03-16 14:03:35,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1346 transitions. [2025-03-16 14:03:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:35,429 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:35,429 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2025-03-16 14:03:35,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-16 14:03:35,429 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:35,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -80572810, now seen corresponding path program 1 times [2025-03-16 14:03:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153422586] [2025-03-16 14:03:35,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:35,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:35,451 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:35,451 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:35,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:35,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:35,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153422586] [2025-03-16 14:03:35,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153422586] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:35,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588503804] [2025-03-16 14:03:35,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:35,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:35,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:35,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:03:35,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:35,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:35,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:35,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:35,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-16 14:03:35,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:35,803 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:35,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588503804] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:35,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:35,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2025-03-16 14:03:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970031735] [2025-03-16 14:03:35,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:35,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:03:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:35,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:03:35,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:35,804 INFO L87 Difference]: Start difference. First operand 968 states and 1346 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:36,125 INFO L93 Difference]: Finished difference Result 1061 states and 1474 transitions. [2025-03-16 14:03:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:03:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2025-03-16 14:03:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:36,129 INFO L225 Difference]: With dead ends: 1061 [2025-03-16 14:03:36,129 INFO L226 Difference]: Without dead ends: 942 [2025-03-16 14:03:36,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:03:36,130 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 137 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:36,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1590 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 14:03:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2025-03-16 14:03:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2025-03-16 14:03:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 879 states have (on average 1.3401592718998863) internal successors, (1178), 874 states have internal predecessors, (1178), 56 states have call successors, (56), 4 states have call predecessors, (56), 6 states have return successors, (72), 67 states have call predecessors, (72), 54 states have call successors, (72) [2025-03-16 14:03:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1306 transitions. [2025-03-16 14:03:36,153 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1306 transitions. Word has length 45 [2025-03-16 14:03:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:36,153 INFO L471 AbstractCegarLoop]: Abstraction has 942 states and 1306 transitions. [2025-03-16 14:03:36,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1306 transitions. [2025-03-16 14:03:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:36,155 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:36,155 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:36,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 14:03:36,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-16 14:03:36,359 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:36,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2055662006, now seen corresponding path program 1 times [2025-03-16 14:03:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:36,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473165884] [2025-03-16 14:03:36,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:36,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:36,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:36,366 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:36,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:36,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473165884] [2025-03-16 14:03:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473165884] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45144416] [2025-03-16 14:03:36,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:36,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:36,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:36,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:03:36,520 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:36,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:36,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:36,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:36,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 14:03:36,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:36,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45144416] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 10] total 13 [2025-03-16 14:03:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693011847] [2025-03-16 14:03:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:36,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:36,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:36,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:36,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:36,658 INFO L87 Difference]: Start difference. First operand 942 states and 1306 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:36,768 INFO L93 Difference]: Finished difference Result 1416 states and 1986 transitions. [2025-03-16 14:03:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2025-03-16 14:03:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:36,773 INFO L225 Difference]: With dead ends: 1416 [2025-03-16 14:03:36,773 INFO L226 Difference]: Without dead ends: 1376 [2025-03-16 14:03:36,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:36,775 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 48 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:36,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 388 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2025-03-16 14:03:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1026. [2025-03-16 14:03:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 958 states have (on average 1.3350730688935282) internal successors, (1279), 949 states have internal predecessors, (1279), 61 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (77), 76 states have call predecessors, (77), 59 states have call successors, (77) [2025-03-16 14:03:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1417 transitions. [2025-03-16 14:03:36,808 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1417 transitions. Word has length 46 [2025-03-16 14:03:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:36,808 INFO L471 AbstractCegarLoop]: Abstraction has 1026 states and 1417 transitions. [2025-03-16 14:03:36,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1417 transitions. [2025-03-16 14:03:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:36,810 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:36,810 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:36,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 14:03:37,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:37,014 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:37,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 442353931, now seen corresponding path program 1 times [2025-03-16 14:03:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601039131] [2025-03-16 14:03:37,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:37,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:37,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:37,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601039131] [2025-03-16 14:03:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601039131] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:37,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:37,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:37,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651238471] [2025-03-16 14:03:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:37,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:37,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:37,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:37,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:37,040 INFO L87 Difference]: Start difference. First operand 1026 states and 1417 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:37,070 INFO L93 Difference]: Finished difference Result 1045 states and 1438 transitions. [2025-03-16 14:03:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:37,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2025-03-16 14:03:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:37,073 INFO L225 Difference]: With dead ends: 1045 [2025-03-16 14:03:37,073 INFO L226 Difference]: Without dead ends: 983 [2025-03-16 14:03:37,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:37,074 INFO L435 NwaCegarLoop]: 122 mSDtfsCounter, 0 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:37,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 360 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2025-03-16 14:03:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 983. [2025-03-16 14:03:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 915 states have (on average 1.340983606557377) internal successors, (1227), 908 states have internal predecessors, (1227), 61 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (75), 74 states have call predecessors, (75), 59 states have call successors, (75) [2025-03-16 14:03:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1363 transitions. [2025-03-16 14:03:37,117 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1363 transitions. Word has length 46 [2025-03-16 14:03:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:37,117 INFO L471 AbstractCegarLoop]: Abstraction has 983 states and 1363 transitions. [2025-03-16 14:03:37,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1363 transitions. [2025-03-16 14:03:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:03:37,118 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:37,118 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:37,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-16 14:03:37,118 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:37,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1034155708, now seen corresponding path program 1 times [2025-03-16 14:03:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:37,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718372149] [2025-03-16 14:03:37,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:37,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:03:37,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:03:37,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:37,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718372149] [2025-03-16 14:03:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718372149] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400333580] [2025-03-16 14:03:37,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:37,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:37,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:37,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 14:03:37,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:03:37,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:03:37,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:37,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:37,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 14:03:37,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:37,621 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400333580] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:37,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 22 [2025-03-16 14:03:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035564102] [2025-03-16 14:03:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:37,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:37,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:37,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2025-03-16 14:03:37,622 INFO L87 Difference]: Start difference. First operand 983 states and 1363 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:37,824 INFO L93 Difference]: Finished difference Result 1109 states and 1543 transitions. [2025-03-16 14:03:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:03:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2025-03-16 14:03:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:37,828 INFO L225 Difference]: With dead ends: 1109 [2025-03-16 14:03:37,828 INFO L226 Difference]: Without dead ends: 1074 [2025-03-16 14:03:37,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2025-03-16 14:03:37,829 INFO L435 NwaCegarLoop]: 149 mSDtfsCounter, 127 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:37,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1036 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2025-03-16 14:03:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1013. [2025-03-16 14:03:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 941 states have (on average 1.334750265674814) internal successors, (1256), 936 states have internal predecessors, (1256), 65 states have call successors, (65), 4 states have call predecessors, (65), 6 states have return successors, (78), 77 states have call predecessors, (78), 62 states have call successors, (78) [2025-03-16 14:03:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1399 transitions. [2025-03-16 14:03:37,854 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1399 transitions. Word has length 47 [2025-03-16 14:03:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:37,854 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1399 transitions. [2025-03-16 14:03:37,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1399 transitions. [2025-03-16 14:03:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:03:37,856 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:37,856 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:37,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:38,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:38,060 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash -718811395, now seen corresponding path program 1 times [2025-03-16 14:03:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102991043] [2025-03-16 14:03:38,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:03:38,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:03:38,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102991043] [2025-03-16 14:03:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102991043] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:38,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:38,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744608343] [2025-03-16 14:03:38,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:38,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:38,094 INFO L87 Difference]: Start difference. First operand 1013 states and 1399 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:38,132 INFO L93 Difference]: Finished difference Result 1062 states and 1458 transitions. [2025-03-16 14:03:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2025-03-16 14:03:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:38,135 INFO L225 Difference]: With dead ends: 1062 [2025-03-16 14:03:38,135 INFO L226 Difference]: Without dead ends: 991 [2025-03-16 14:03:38,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:38,136 INFO L435 NwaCegarLoop]: 141 mSDtfsCounter, 51 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:38,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 380 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2025-03-16 14:03:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 918. [2025-03-16 14:03:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 851 states have (on average 1.3125734430082256) internal successors, (1117), 846 states have internal predecessors, (1117), 60 states have call successors, (60), 4 states have call predecessors, (60), 6 states have return successors, (73), 72 states have call predecessors, (73), 57 states have call successors, (73) [2025-03-16 14:03:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1250 transitions. [2025-03-16 14:03:38,167 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1250 transitions. Word has length 47 [2025-03-16 14:03:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:38,168 INFO L471 AbstractCegarLoop]: Abstraction has 918 states and 1250 transitions. [2025-03-16 14:03:38,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1250 transitions. [2025-03-16 14:03:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:03:38,169 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,170 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-16 14:03:38,170 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -994657520, now seen corresponding path program 1 times [2025-03-16 14:03:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753306166] [2025-03-16 14:03:38,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:38,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:38,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:38,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753306166] [2025-03-16 14:03:38,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753306166] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:38,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:38,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671210391] [2025-03-16 14:03:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:38,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:38,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:38,196 INFO L87 Difference]: Start difference. First operand 918 states and 1250 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:38,246 INFO L93 Difference]: Finished difference Result 1826 states and 2497 transitions. [2025-03-16 14:03:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2025-03-16 14:03:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:38,250 INFO L225 Difference]: With dead ends: 1826 [2025-03-16 14:03:38,251 INFO L226 Difference]: Without dead ends: 924 [2025-03-16 14:03:38,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:38,255 INFO L435 NwaCegarLoop]: 116 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:38,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 219 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2025-03-16 14:03:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 920. [2025-03-16 14:03:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 853 states have (on average 1.3130128956623681) internal successors, (1120), 848 states have internal predecessors, (1120), 60 states have call successors, (60), 4 states have call predecessors, (60), 6 states have return successors, (73), 72 states have call predecessors, (73), 57 states have call successors, (73) [2025-03-16 14:03:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1253 transitions. [2025-03-16 14:03:38,286 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1253 transitions. Word has length 48 [2025-03-16 14:03:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:38,286 INFO L471 AbstractCegarLoop]: Abstraction has 920 states and 1253 transitions. [2025-03-16 14:03:38,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1253 transitions. [2025-03-16 14:03:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2025-03-16 14:03:38,291 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,291 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-16 14:03:38,292 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1148099657, now seen corresponding path program 1 times [2025-03-16 14:03:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289242642] [2025-03-16 14:03:38,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:38,298 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:38,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:38,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289242642] [2025-03-16 14:03:38,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289242642] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:38,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922437039] [2025-03-16 14:03:38,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:38,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:38,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:38,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:03:38,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-16 14:03:38,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-16 14:03:38,382 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:38,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 14:03:38,412 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:38,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922437039] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:38,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:38,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-16 14:03:38,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811808723] [2025-03-16 14:03:38,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:38,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:38,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:38,416 INFO L87 Difference]: Start difference. First operand 920 states and 1253 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:38,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:38,475 INFO L93 Difference]: Finished difference Result 1811 states and 2479 transitions. [2025-03-16 14:03:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:38,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2025-03-16 14:03:38,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:38,478 INFO L225 Difference]: With dead ends: 1811 [2025-03-16 14:03:38,478 INFO L226 Difference]: Without dead ends: 933 [2025-03-16 14:03:38,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:38,479 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 14 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:38,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 324 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2025-03-16 14:03:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 924. [2025-03-16 14:03:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 856 states have (on average 1.3130841121495327) internal successors, (1124), 852 states have internal predecessors, (1124), 60 states have call successors, (60), 4 states have call predecessors, (60), 7 states have return successors, (81), 72 states have call predecessors, (81), 57 states have call successors, (81) [2025-03-16 14:03:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1265 transitions. [2025-03-16 14:03:38,502 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1265 transitions. Word has length 48 [2025-03-16 14:03:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:38,502 INFO L471 AbstractCegarLoop]: Abstraction has 924 states and 1265 transitions. [2025-03-16 14:03:38,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1265 transitions. [2025-03-16 14:03:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:38,504 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,504 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:38,704 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,SelfDestructingSolverStorable17 [2025-03-16 14:03:38,704 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1200773858, now seen corresponding path program 1 times [2025-03-16 14:03:38,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920147663] [2025-03-16 14:03:38,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:38,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:38,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:38,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920147663] [2025-03-16 14:03:38,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920147663] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:38,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:38,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:38,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312852517] [2025-03-16 14:03:38,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:38,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:38,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:38,731 INFO L87 Difference]: Start difference. First operand 924 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:38,762 INFO L93 Difference]: Finished difference Result 933 states and 1273 transitions. [2025-03-16 14:03:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2025-03-16 14:03:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:38,765 INFO L225 Difference]: With dead ends: 933 [2025-03-16 14:03:38,765 INFO L226 Difference]: Without dead ends: 890 [2025-03-16 14:03:38,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:38,766 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:38,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 357 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2025-03-16 14:03:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 884. [2025-03-16 14:03:38,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 818 states have (on average 1.3105134474327629) internal successors, (1072), 815 states have internal predecessors, (1072), 58 states have call successors, (58), 4 states have call predecessors, (58), 7 states have return successors, (75), 68 states have call predecessors, (75), 55 states have call successors, (75) [2025-03-16 14:03:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1205 transitions. [2025-03-16 14:03:38,793 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1205 transitions. Word has length 49 [2025-03-16 14:03:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:38,793 INFO L471 AbstractCegarLoop]: Abstraction has 884 states and 1205 transitions. [2025-03-16 14:03:38,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1205 transitions. [2025-03-16 14:03:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:38,795 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:38,795 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:38,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-16 14:03:38,795 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:38,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1311420182, now seen corresponding path program 1 times [2025-03-16 14:03:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097846986] [2025-03-16 14:03:38,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:38,799 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:38,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:38,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:38,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:38,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:38,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097846986] [2025-03-16 14:03:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097846986] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:38,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:38,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219340530] [2025-03-16 14:03:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:38,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:38,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:38,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:38,880 INFO L87 Difference]: Start difference. First operand 884 states and 1205 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,044 INFO L93 Difference]: Finished difference Result 1187 states and 1632 transitions. [2025-03-16 14:03:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:39,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2025-03-16 14:03:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,048 INFO L225 Difference]: With dead ends: 1187 [2025-03-16 14:03:39,048 INFO L226 Difference]: Without dead ends: 1115 [2025-03-16 14:03:39,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:39,049 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 56 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 474 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2025-03-16 14:03:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 897. [2025-03-16 14:03:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 826 states have (on average 1.3256658595641646) internal successors, (1095), 827 states have internal predecessors, (1095), 63 states have call successors, (63), 4 states have call predecessors, (63), 7 states have return successors, (76), 69 states have call predecessors, (76), 60 states have call successors, (76) [2025-03-16 14:03:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1234 transitions. [2025-03-16 14:03:39,074 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1234 transitions. Word has length 49 [2025-03-16 14:03:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,075 INFO L471 AbstractCegarLoop]: Abstraction has 897 states and 1234 transitions. [2025-03-16 14:03:39,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1234 transitions. [2025-03-16 14:03:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:03:39,076 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,076 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-16 14:03:39,076 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1594191033, now seen corresponding path program 1 times [2025-03-16 14:03:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7631266] [2025-03-16 14:03:39,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:03:39,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:03:39,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7631266] [2025-03-16 14:03:39,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7631266] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:39,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:39,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987736567] [2025-03-16 14:03:39,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:39,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:39,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:39,098 INFO L87 Difference]: Start difference. First operand 897 states and 1234 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,143 INFO L93 Difference]: Finished difference Result 1789 states and 2464 transitions. [2025-03-16 14:03:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2025-03-16 14:03:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,146 INFO L225 Difference]: With dead ends: 1789 [2025-03-16 14:03:39,147 INFO L226 Difference]: Without dead ends: 903 [2025-03-16 14:03:39,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:39,150 INFO L435 NwaCegarLoop]: 121 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 224 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2025-03-16 14:03:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 899. [2025-03-16 14:03:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 828 states have (on average 1.3248792270531402) internal successors, (1097), 829 states have internal predecessors, (1097), 63 states have call successors, (63), 4 states have call predecessors, (63), 7 states have return successors, (76), 69 states have call predecessors, (76), 60 states have call successors, (76) [2025-03-16 14:03:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1236 transitions. [2025-03-16 14:03:39,173 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1236 transitions. Word has length 49 [2025-03-16 14:03:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,173 INFO L471 AbstractCegarLoop]: Abstraction has 899 states and 1236 transitions. [2025-03-16 14:03:39,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1236 transitions. [2025-03-16 14:03:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:39,175 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,175 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-16 14:03:39,175 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2022068076, now seen corresponding path program 1 times [2025-03-16 14:03:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618944382] [2025-03-16 14:03:39,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:39,198 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:39,198 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-16 14:03:39,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618944382] [2025-03-16 14:03:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618944382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142367470] [2025-03-16 14:03:39,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:39,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:39,242 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) [2025-03-16 14:03:39,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:03:39,276 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:39,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:39,291 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:39,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 14:03:39,321 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142367470] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-16 14:03:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557048509] [2025-03-16 14:03:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:39,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:39,322 INFO L87 Difference]: Start difference. First operand 899 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:39,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,373 INFO L93 Difference]: Finished difference Result 1792 states and 2467 transitions. [2025-03-16 14:03:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2025-03-16 14:03:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,377 INFO L225 Difference]: With dead ends: 1792 [2025-03-16 14:03:39,377 INFO L226 Difference]: Without dead ends: 904 [2025-03-16 14:03:39,378 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:39,381 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 227 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2025-03-16 14:03:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 897. [2025-03-16 14:03:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 826 states have (on average 1.324455205811138) internal successors, (1094), 827 states have internal predecessors, (1094), 63 states have call successors, (63), 4 states have call predecessors, (63), 7 states have return successors, (76), 69 states have call predecessors, (76), 60 states have call successors, (76) [2025-03-16 14:03:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1233 transitions. [2025-03-16 14:03:39,407 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1233 transitions. Word has length 50 [2025-03-16 14:03:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,407 INFO L471 AbstractCegarLoop]: Abstraction has 897 states and 1233 transitions. [2025-03-16 14:03:39,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1233 transitions. [2025-03-16 14:03:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:39,408 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,408 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:39,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:39,609 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash 406096398, now seen corresponding path program 1 times [2025-03-16 14:03:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723664890] [2025-03-16 14:03:39,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:39,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:39,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723664890] [2025-03-16 14:03:39,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723664890] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:39,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:39,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:39,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196564963] [2025-03-16 14:03:39,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:39,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:39,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:39,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:39,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:39,671 INFO L87 Difference]: Start difference. First operand 897 states and 1233 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:39,733 INFO L93 Difference]: Finished difference Result 1785 states and 2455 transitions. [2025-03-16 14:03:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2025-03-16 14:03:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:39,737 INFO L225 Difference]: With dead ends: 1785 [2025-03-16 14:03:39,737 INFO L226 Difference]: Without dead ends: 899 [2025-03-16 14:03:39,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:39,740 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:39,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 340 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2025-03-16 14:03:39,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 896. [2025-03-16 14:03:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 825 states have (on average 1.3236363636363637) internal successors, (1092), 826 states have internal predecessors, (1092), 63 states have call successors, (63), 4 states have call predecessors, (63), 7 states have return successors, (76), 69 states have call predecessors, (76), 60 states have call successors, (76) [2025-03-16 14:03:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1231 transitions. [2025-03-16 14:03:39,763 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1231 transitions. Word has length 50 [2025-03-16 14:03:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:39,763 INFO L471 AbstractCegarLoop]: Abstraction has 896 states and 1231 transitions. [2025-03-16 14:03:39,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1231 transitions. [2025-03-16 14:03:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:39,764 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:39,765 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:39,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-16 14:03:39,765 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:39,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash 13699672, now seen corresponding path program 1 times [2025-03-16 14:03:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882886814] [2025-03-16 14:03:39,765 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:39,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:39,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:39,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:39,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:39,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882886814] [2025-03-16 14:03:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882886814] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:39,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856772866] [2025-03-16 14:03:39,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:39,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:39,867 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) [2025-03-16 14:03:39,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 14:03:39,897 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:39,912 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:39,912 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:39,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:39,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:03:39,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:39,931 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856772866] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:40,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2025-03-16 14:03:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915102076] [2025-03-16 14:03:40,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:40,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:03:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:40,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:03:40,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:40,042 INFO L87 Difference]: Start difference. First operand 896 states and 1231 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:40,204 INFO L93 Difference]: Finished difference Result 1062 states and 1456 transitions. [2025-03-16 14:03:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:03:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2025-03-16 14:03:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:40,207 INFO L225 Difference]: With dead ends: 1062 [2025-03-16 14:03:40,208 INFO L226 Difference]: Without dead ends: 921 [2025-03-16 14:03:40,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:40,208 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 168 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:40,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1066 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2025-03-16 14:03:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 850. [2025-03-16 14:03:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 782 states have (on average 1.3209718670076727) internal successors, (1033), 783 states have internal predecessors, (1033), 60 states have call successors, (60), 4 states have call predecessors, (60), 7 states have return successors, (73), 66 states have call predecessors, (73), 57 states have call successors, (73) [2025-03-16 14:03:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1166 transitions. [2025-03-16 14:03:40,229 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1166 transitions. Word has length 50 [2025-03-16 14:03:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:40,230 INFO L471 AbstractCegarLoop]: Abstraction has 850 states and 1166 transitions. [2025-03-16 14:03:40,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:03:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1166 transitions. [2025-03-16 14:03:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:40,231 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:40,231 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:40,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:40,431 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,SelfDestructingSolverStorable23 [2025-03-16 14:03:40,432 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:40,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1100447788, now seen corresponding path program 1 times [2025-03-16 14:03:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:40,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769214184] [2025-03-16 14:03:40,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:40,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:40,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:40,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:40,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:40,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:40,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769214184] [2025-03-16 14:03:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769214184] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587368671] [2025-03-16 14:03:40,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:40,558 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) [2025-03-16 14:03:40,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:03:40,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:40,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:40,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:40,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:40,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 14:03:40,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:40,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:40,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587368671] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:40,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:40,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 9] total 16 [2025-03-16 14:03:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001134514] [2025-03-16 14:03:40,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:40,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:40,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:40,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:40,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:40,719 INFO L87 Difference]: Start difference. First operand 850 states and 1166 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:40,819 INFO L93 Difference]: Finished difference Result 931 states and 1265 transitions. [2025-03-16 14:03:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2025-03-16 14:03:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:40,822 INFO L225 Difference]: With dead ends: 931 [2025-03-16 14:03:40,822 INFO L226 Difference]: Without dead ends: 883 [2025-03-16 14:03:40,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2025-03-16 14:03:40,823 INFO L435 NwaCegarLoop]: 110 mSDtfsCounter, 49 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:40,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 364 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2025-03-16 14:03:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 838. [2025-03-16 14:03:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 770 states have (on average 1.2974025974025973) internal successors, (999), 773 states have internal predecessors, (999), 60 states have call successors, (60), 4 states have call predecessors, (60), 7 states have return successors, (73), 63 states have call predecessors, (73), 57 states have call successors, (73) [2025-03-16 14:03:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1132 transitions. [2025-03-16 14:03:40,849 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1132 transitions. Word has length 50 [2025-03-16 14:03:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:40,849 INFO L471 AbstractCegarLoop]: Abstraction has 838 states and 1132 transitions. [2025-03-16 14:03:40,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1132 transitions. [2025-03-16 14:03:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-16 14:03:40,850 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:40,850 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:40,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:41,054 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,SelfDestructingSolverStorable24 [2025-03-16 14:03:41,054 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:41,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:41,054 INFO L85 PathProgramCache]: Analyzing trace with hash -182813833, now seen corresponding path program 1 times [2025-03-16 14:03:41,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:41,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177888617] [2025-03-16 14:03:41,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:41,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:41,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-16 14:03:41,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-16 14:03:41,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:41,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:41,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177888617] [2025-03-16 14:03:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177888617] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:41,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:41,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:41,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608771451] [2025-03-16 14:03:41,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:41,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:41,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:41,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:41,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:41,207 INFO L87 Difference]: Start difference. First operand 838 states and 1132 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:41,284 INFO L93 Difference]: Finished difference Result 844 states and 1137 transitions. [2025-03-16 14:03:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2025-03-16 14:03:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:41,291 INFO L225 Difference]: With dead ends: 844 [2025-03-16 14:03:41,292 INFO L226 Difference]: Without dead ends: 842 [2025-03-16 14:03:41,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:41,292 INFO L435 NwaCegarLoop]: 112 mSDtfsCounter, 14 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:41,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 634 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2025-03-16 14:03:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2025-03-16 14:03:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 773 states have (on average 1.296248382923674) internal successors, (1002), 776 states have internal predecessors, (1002), 60 states have call successors, (60), 5 states have call predecessors, (60), 8 states have return successors, (73), 63 states have call predecessors, (73), 57 states have call successors, (73) [2025-03-16 14:03:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1135 transitions. [2025-03-16 14:03:41,315 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1135 transitions. Word has length 50 [2025-03-16 14:03:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:41,317 INFO L471 AbstractCegarLoop]: Abstraction has 842 states and 1135 transitions. [2025-03-16 14:03:41,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1135 transitions. [2025-03-16 14:03:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:03:41,318 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:41,318 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:41,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-16 14:03:41,319 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:41,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash -101613279, now seen corresponding path program 1 times [2025-03-16 14:03:41,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:41,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656870421] [2025-03-16 14:03:41,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:41,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:03:41,335 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:03:41,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:41,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:41,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:41,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656870421] [2025-03-16 14:03:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656870421] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:41,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:41,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227454011] [2025-03-16 14:03:41,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:41,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:41,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:41,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:41,467 INFO L87 Difference]: Start difference. First operand 842 states and 1135 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:41,656 INFO L93 Difference]: Finished difference Result 1045 states and 1413 transitions. [2025-03-16 14:03:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2025-03-16 14:03:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:41,659 INFO L225 Difference]: With dead ends: 1045 [2025-03-16 14:03:41,659 INFO L226 Difference]: Without dead ends: 1028 [2025-03-16 14:03:41,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:41,660 INFO L435 NwaCegarLoop]: 159 mSDtfsCounter, 55 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:41,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 764 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2025-03-16 14:03:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 871. [2025-03-16 14:03:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 799 states have (on average 1.290362953692115) internal successors, (1031), 803 states have internal predecessors, (1031), 63 states have call successors, (63), 5 states have call predecessors, (63), 8 states have return successors, (76), 66 states have call predecessors, (76), 60 states have call successors, (76) [2025-03-16 14:03:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1170 transitions. [2025-03-16 14:03:41,681 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1170 transitions. Word has length 52 [2025-03-16 14:03:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:41,681 INFO L471 AbstractCegarLoop]: Abstraction has 871 states and 1170 transitions. [2025-03-16 14:03:41,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1170 transitions. [2025-03-16 14:03:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:03:41,682 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:41,683 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:41,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-16 14:03:41,683 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:41,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash -162812938, now seen corresponding path program 1 times [2025-03-16 14:03:41,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:41,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130536987] [2025-03-16 14:03:41,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:41,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:41,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:03:41,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:03:41,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:41,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:41,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:41,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130536987] [2025-03-16 14:03:41,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130536987] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:41,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:41,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:41,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327916959] [2025-03-16 14:03:41,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:41,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:41,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:41,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:41,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:41,736 INFO L87 Difference]: Start difference. First operand 871 states and 1170 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:41,787 INFO L93 Difference]: Finished difference Result 883 states and 1182 transitions. [2025-03-16 14:03:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:41,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2025-03-16 14:03:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:41,791 INFO L225 Difference]: With dead ends: 883 [2025-03-16 14:03:41,791 INFO L226 Difference]: Without dead ends: 881 [2025-03-16 14:03:41,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:41,792 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 8 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:41,793 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 576 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2025-03-16 14:03:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 877. [2025-03-16 14:03:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 803 states have (on average 1.2889165628891657) internal successors, (1035), 808 states have internal predecessors, (1035), 64 states have call successors, (64), 6 states have call predecessors, (64), 9 states have return successors, (77), 66 states have call predecessors, (77), 61 states have call successors, (77) [2025-03-16 14:03:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1176 transitions. [2025-03-16 14:03:41,815 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1176 transitions. Word has length 52 [2025-03-16 14:03:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:41,815 INFO L471 AbstractCegarLoop]: Abstraction has 877 states and 1176 transitions. [2025-03-16 14:03:41,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1176 transitions. [2025-03-16 14:03:41,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 14:03:41,816 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:41,817 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:41,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-16 14:03:41,817 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:41,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1161620418, now seen corresponding path program 1 times [2025-03-16 14:03:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:41,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783989085] [2025-03-16 14:03:41,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:41,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 14:03:41,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 14:03:41,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:41,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:41,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783989085] [2025-03-16 14:03:41,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783989085] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:41,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:41,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902166953] [2025-03-16 14:03:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:41,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:41,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:41,976 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:41,976 INFO L87 Difference]: Start difference. First operand 877 states and 1176 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:42,179 INFO L93 Difference]: Finished difference Result 1311 states and 1745 transitions. [2025-03-16 14:03:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2025-03-16 14:03:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:42,182 INFO L225 Difference]: With dead ends: 1311 [2025-03-16 14:03:42,182 INFO L226 Difference]: Without dead ends: 1256 [2025-03-16 14:03:42,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:42,183 INFO L435 NwaCegarLoop]: 183 mSDtfsCounter, 110 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:42,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 886 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2025-03-16 14:03:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 869. [2025-03-16 14:03:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 798 states have (on average 1.2844611528822054) internal successors, (1025), 802 states have internal predecessors, (1025), 61 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (74), 63 states have call predecessors, (74), 58 states have call successors, (74) [2025-03-16 14:03:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1160 transitions. [2025-03-16 14:03:42,208 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1160 transitions. Word has length 54 [2025-03-16 14:03:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:42,208 INFO L471 AbstractCegarLoop]: Abstraction has 869 states and 1160 transitions. [2025-03-16 14:03:42,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1160 transitions. [2025-03-16 14:03:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-16 14:03:42,209 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:42,209 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:42,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-16 14:03:42,209 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:42,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1570444643, now seen corresponding path program 1 times [2025-03-16 14:03:42,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:42,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984084927] [2025-03-16 14:03:42,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:42,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 14:03:42,223 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 14:03:42,223 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:42,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984084927] [2025-03-16 14:03:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984084927] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687266512] [2025-03-16 14:03:42,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:42,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:42,587 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) [2025-03-16 14:03:42,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 14:03:42,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-16 14:03:42,632 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-16 14:03:42,632 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:42,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:42,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 14:03:42,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:42,813 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:42,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687266512] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:42,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:42,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2025-03-16 14:03:42,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239231613] [2025-03-16 14:03:42,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:42,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:42,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:42,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:42,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2025-03-16 14:03:42,815 INFO L87 Difference]: Start difference. First operand 869 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,059 INFO L93 Difference]: Finished difference Result 1302 states and 1737 transitions. [2025-03-16 14:03:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:03:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2025-03-16 14:03:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,063 INFO L225 Difference]: With dead ends: 1302 [2025-03-16 14:03:43,063 INFO L226 Difference]: Without dead ends: 1190 [2025-03-16 14:03:43,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2025-03-16 14:03:43,065 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 99 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 785 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2025-03-16 14:03:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 865. [2025-03-16 14:03:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 795 states have (on average 1.2842767295597484) internal successors, (1021), 800 states have internal predecessors, (1021), 60 states have call successors, (60), 6 states have call predecessors, (60), 9 states have return successors, (72), 61 states have call predecessors, (72), 57 states have call successors, (72) [2025-03-16 14:03:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1153 transitions. [2025-03-16 14:03:43,089 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1153 transitions. Word has length 54 [2025-03-16 14:03:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,089 INFO L471 AbstractCegarLoop]: Abstraction has 865 states and 1153 transitions. [2025-03-16 14:03:43,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1153 transitions. [2025-03-16 14:03:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-16 14:03:43,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,090 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:43,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:43,292 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1096170608, now seen corresponding path program 1 times [2025-03-16 14:03:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698314794] [2025-03-16 14:03:43,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,298 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-16 14:03:43,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 14:03:43,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698314794] [2025-03-16 14:03:43,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698314794] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:43,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:43,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:03:43,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669322559] [2025-03-16 14:03:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:43,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:43,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:43,351 INFO L87 Difference]: Start difference. First operand 865 states and 1153 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2025-03-16 14:03:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,417 INFO L93 Difference]: Finished difference Result 937 states and 1260 transitions. [2025-03-16 14:03:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 57 [2025-03-16 14:03:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,420 INFO L225 Difference]: With dead ends: 937 [2025-03-16 14:03:43,420 INFO L226 Difference]: Without dead ends: 932 [2025-03-16 14:03:43,421 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:43,421 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 9 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,421 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 431 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2025-03-16 14:03:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 911. [2025-03-16 14:03:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 826 states have (on average 1.297820823244552) internal successors, (1072), 845 states have internal predecessors, (1072), 74 states have call successors, (74), 7 states have call predecessors, (74), 10 states have return successors, (86), 61 states have call predecessors, (86), 71 states have call successors, (86) [2025-03-16 14:03:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1232 transitions. [2025-03-16 14:03:43,451 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1232 transitions. Word has length 57 [2025-03-16 14:03:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,451 INFO L471 AbstractCegarLoop]: Abstraction has 911 states and 1232 transitions. [2025-03-16 14:03:43,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2025-03-16 14:03:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1232 transitions. [2025-03-16 14:03:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 14:03:43,452 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,452 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-16 14:03:43,453 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -245816706, now seen corresponding path program 1 times [2025-03-16 14:03:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008554199] [2025-03-16 14:03:43,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 14:03:43,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 14:03:43,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:43,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008554199] [2025-03-16 14:03:43,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008554199] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:43,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:43,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:03:43,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038798348] [2025-03-16 14:03:43,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:03:43,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:03:43,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:03:43,554 INFO L87 Difference]: Start difference. First operand 911 states and 1232 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:43,711 INFO L93 Difference]: Finished difference Result 1763 states and 2408 transitions. [2025-03-16 14:03:43,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:43,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2025-03-16 14:03:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:43,716 INFO L225 Difference]: With dead ends: 1763 [2025-03-16 14:03:43,716 INFO L226 Difference]: Without dead ends: 1417 [2025-03-16 14:03:43,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:03:43,717 INFO L435 NwaCegarLoop]: 112 mSDtfsCounter, 21 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:43,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 819 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2025-03-16 14:03:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1138. [2025-03-16 14:03:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1030 states have (on average 1.2805825242718447) internal successors, (1319), 1052 states have internal predecessors, (1319), 97 states have call successors, (97), 7 states have call predecessors, (97), 10 states have return successors, (109), 81 states have call predecessors, (109), 94 states have call successors, (109) [2025-03-16 14:03:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1525 transitions. [2025-03-16 14:03:43,752 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1525 transitions. Word has length 58 [2025-03-16 14:03:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:43,752 INFO L471 AbstractCegarLoop]: Abstraction has 1138 states and 1525 transitions. [2025-03-16 14:03:43,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1525 transitions. [2025-03-16 14:03:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-03-16 14:03:43,754 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:43,754 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:43,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-16 14:03:43,754 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:43,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1375748756, now seen corresponding path program 1 times [2025-03-16 14:03:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:43,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931091163] [2025-03-16 14:03:43,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:43,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-16 14:03:43,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 14:03:43,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:43,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931091163] [2025-03-16 14:03:43,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931091163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861150914] [2025-03-16 14:03:43,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:43,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:43,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:43,801 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) [2025-03-16 14:03:43,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 14:03:43,832 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-03-16 14:03:43,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-03-16 14:03:43,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:43,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:43,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:43,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 14:03:43,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:43,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861150914] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:43,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:43,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-16 14:03:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446395851] [2025-03-16 14:03:43,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:43,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:03:43,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:43,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:03:43,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:43,921 INFO L87 Difference]: Start difference. First operand 1138 states and 1525 transitions. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:03:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:44,020 INFO L93 Difference]: Finished difference Result 2332 states and 3141 transitions. [2025-03-16 14:03:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2025-03-16 14:03:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:44,028 INFO L225 Difference]: With dead ends: 2332 [2025-03-16 14:03:44,028 INFO L226 Difference]: Without dead ends: 1196 [2025-03-16 14:03:44,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:44,032 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 99 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:44,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 446 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2025-03-16 14:03:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1158. [2025-03-16 14:03:44,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1048 states have (on average 1.284351145038168) internal successors, (1346), 1072 states have internal predecessors, (1346), 97 states have call successors, (97), 7 states have call predecessors, (97), 12 states have return successors, (117), 81 states have call predecessors, (117), 94 states have call successors, (117) [2025-03-16 14:03:44,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1560 transitions. [2025-03-16 14:03:44,086 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1560 transitions. Word has length 57 [2025-03-16 14:03:44,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:44,086 INFO L471 AbstractCegarLoop]: Abstraction has 1158 states and 1560 transitions. [2025-03-16 14:03:44,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-16 14:03:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1560 transitions. [2025-03-16 14:03:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 14:03:44,088 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:44,089 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:44,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:44,289 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,SelfDestructingSolverStorable32 [2025-03-16 14:03:44,289 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:44,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash 871963916, now seen corresponding path program 1 times [2025-03-16 14:03:44,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:44,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586677030] [2025-03-16 14:03:44,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:44,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-16 14:03:44,299 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 14:03:44,299 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:44,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:44,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586677030] [2025-03-16 14:03:44,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586677030] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:44,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:44,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935951466] [2025-03-16 14:03:44,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:44,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:44,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:44,363 INFO L87 Difference]: Start difference. First operand 1158 states and 1560 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2025-03-16 14:03:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:44,458 INFO L93 Difference]: Finished difference Result 1259 states and 1710 transitions. [2025-03-16 14:03:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 59 [2025-03-16 14:03:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:44,462 INFO L225 Difference]: With dead ends: 1259 [2025-03-16 14:03:44,462 INFO L226 Difference]: Without dead ends: 1250 [2025-03-16 14:03:44,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:44,463 INFO L435 NwaCegarLoop]: 119 mSDtfsCounter, 9 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:44,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 556 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:44,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2025-03-16 14:03:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1168. [2025-03-16 14:03:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1058 states have (on average 1.2939508506616257) internal successors, (1369), 1082 states have internal predecessors, (1369), 97 states have call successors, (97), 7 states have call predecessors, (97), 12 states have return successors, (117), 81 states have call predecessors, (117), 94 states have call successors, (117) [2025-03-16 14:03:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1583 transitions. [2025-03-16 14:03:44,510 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1583 transitions. Word has length 59 [2025-03-16 14:03:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:44,510 INFO L471 AbstractCegarLoop]: Abstraction has 1168 states and 1583 transitions. [2025-03-16 14:03:44,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2025-03-16 14:03:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1583 transitions. [2025-03-16 14:03:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 14:03:44,512 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:44,512 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:44,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-16 14:03:44,512 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:44,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 269904997, now seen corresponding path program 1 times [2025-03-16 14:03:44,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:44,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103492911] [2025-03-16 14:03:44,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:44,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-16 14:03:44,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 14:03:44,530 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:44,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103492911] [2025-03-16 14:03:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103492911] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:44,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:44,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 14:03:44,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573509041] [2025-03-16 14:03:44,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 14:03:44,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 14:03:44,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:44,573 INFO L87 Difference]: Start difference. First operand 1168 states and 1583 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2025-03-16 14:03:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:44,621 INFO L93 Difference]: Finished difference Result 1373 states and 1860 transitions. [2025-03-16 14:03:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 14:03:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 59 [2025-03-16 14:03:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:44,624 INFO L225 Difference]: With dead ends: 1373 [2025-03-16 14:03:44,624 INFO L226 Difference]: Without dead ends: 1167 [2025-03-16 14:03:44,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 14:03:44,627 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 219 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 [2025-03-16 14:03:44,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 219 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2025-03-16 14:03:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1153. [2025-03-16 14:03:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1043 states have (on average 1.2837967401725792) internal successors, (1339), 1067 states have internal predecessors, (1339), 97 states have call successors, (97), 7 states have call predecessors, (97), 12 states have return successors, (117), 81 states have call predecessors, (117), 94 states have call successors, (117) [2025-03-16 14:03:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1553 transitions. [2025-03-16 14:03:44,662 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1553 transitions. Word has length 59 [2025-03-16 14:03:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:44,662 INFO L471 AbstractCegarLoop]: Abstraction has 1153 states and 1553 transitions. [2025-03-16 14:03:44,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2025-03-16 14:03:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1553 transitions. [2025-03-16 14:03:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 14:03:44,665 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:44,665 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:44,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-03-16 14:03:44,665 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:44,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:44,665 INFO L85 PathProgramCache]: Analyzing trace with hash 568223602, now seen corresponding path program 1 times [2025-03-16 14:03:44,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:44,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383550370] [2025-03-16 14:03:44,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:44,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 14:03:44,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 14:03:44,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:44,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:44,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383550370] [2025-03-16 14:03:44,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383550370] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:44,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:44,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-16 14:03:44,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039175248] [2025-03-16 14:03:44,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:44,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:03:44,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:44,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:03:44,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:44,773 INFO L87 Difference]: Start difference. First operand 1153 states and 1553 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:44,909 INFO L93 Difference]: Finished difference Result 1461 states and 1957 transitions. [2025-03-16 14:03:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2025-03-16 14:03:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:44,912 INFO L225 Difference]: With dead ends: 1461 [2025-03-16 14:03:44,912 INFO L226 Difference]: Without dead ends: 1140 [2025-03-16 14:03:44,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:44,913 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 77 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:44,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 775 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2025-03-16 14:03:44,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1101. [2025-03-16 14:03:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 998 states have (on average 1.2785571142284569) internal successors, (1276), 1019 states have internal predecessors, (1276), 90 states have call successors, (90), 7 states have call predecessors, (90), 12 states have return successors, (110), 77 states have call predecessors, (110), 87 states have call successors, (110) [2025-03-16 14:03:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1476 transitions. [2025-03-16 14:03:44,943 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1476 transitions. Word has length 60 [2025-03-16 14:03:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:44,943 INFO L471 AbstractCegarLoop]: Abstraction has 1101 states and 1476 transitions. [2025-03-16 14:03:44,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:03:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1476 transitions. [2025-03-16 14:03:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:03:44,945 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:44,945 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:44,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-16 14:03:44,945 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:44,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 195421496, now seen corresponding path program 1 times [2025-03-16 14:03:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:44,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340812612] [2025-03-16 14:03:44,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:44,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:44,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:03:44,957 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:03:44,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:44,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340812612] [2025-03-16 14:03:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340812612] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617830769] [2025-03-16 14:03:45,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:45,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:45,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:45,036 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) [2025-03-16 14:03:45,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 14:03:45,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:03:45,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:03:45,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:45,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:45,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-16 14:03:45,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 14:03:45,145 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:45,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617830769] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:45,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:45,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 12 [2025-03-16 14:03:45,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109748027] [2025-03-16 14:03:45,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:45,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:45,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:45,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:45,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:45,146 INFO L87 Difference]: Start difference. First operand 1101 states and 1476 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:03:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:45,371 INFO L93 Difference]: Finished difference Result 1315 states and 1748 transitions. [2025-03-16 14:03:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2025-03-16 14:03:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:45,375 INFO L225 Difference]: With dead ends: 1315 [2025-03-16 14:03:45,375 INFO L226 Difference]: Without dead ends: 1175 [2025-03-16 14:03:45,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:45,376 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 123 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:45,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 868 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2025-03-16 14:03:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1101. [2025-03-16 14:03:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 998 states have (on average 1.2755511022044088) internal successors, (1273), 1019 states have internal predecessors, (1273), 90 states have call successors, (90), 7 states have call predecessors, (90), 12 states have return successors, (110), 77 states have call predecessors, (110), 87 states have call successors, (110) [2025-03-16 14:03:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1473 transitions. [2025-03-16 14:03:45,425 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1473 transitions. Word has length 61 [2025-03-16 14:03:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:45,425 INFO L471 AbstractCegarLoop]: Abstraction has 1101 states and 1473 transitions. [2025-03-16 14:03:45,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:03:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1473 transitions. [2025-03-16 14:03:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2025-03-16 14:03:45,427 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:45,427 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:45,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:45,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:45,632 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:45,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1788182385, now seen corresponding path program 1 times [2025-03-16 14:03:45,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:45,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366963387] [2025-03-16 14:03:45,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:45,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:45,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 14:03:45,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 14:03:45,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:45,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-16 14:03:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 14:03:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366963387] [2025-03-16 14:03:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366963387] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026448830] [2025-03-16 14:03:45,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:45,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:45,683 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) [2025-03-16 14:03:45,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 14:03:45,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-03-16 14:03:45,732 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-03-16 14:03:45,732 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:45,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:45,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:03:45,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:45,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026448830] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:45,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 14:03:45,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2025-03-16 14:03:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521722757] [2025-03-16 14:03:45,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:45,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:03:45,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 14:03:45,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:03:45,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:45,868 INFO L87 Difference]: Start difference. First operand 1101 states and 1473 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 14 states have internal predecessors, (67), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:46,065 INFO L93 Difference]: Finished difference Result 1877 states and 2500 transitions. [2025-03-16 14:03:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:03:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 14 states have internal predecessors, (67), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2025-03-16 14:03:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:46,072 INFO L225 Difference]: With dead ends: 1877 [2025-03-16 14:03:46,072 INFO L226 Difference]: Without dead ends: 772 [2025-03-16 14:03:46,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:03:46,074 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 27 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:46,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1040 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2025-03-16 14:03:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 747. [2025-03-16 14:03:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 674 states have (on average 1.268545994065282) internal successors, (855), 691 states have internal predecessors, (855), 63 states have call successors, (63), 7 states have call predecessors, (63), 9 states have return successors, (64), 51 states have call predecessors, (64), 61 states have call successors, (64) [2025-03-16 14:03:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 982 transitions. [2025-03-16 14:03:46,095 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 982 transitions. Word has length 60 [2025-03-16 14:03:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:46,095 INFO L471 AbstractCegarLoop]: Abstraction has 747 states and 982 transitions. [2025-03-16 14:03:46,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 14 states have internal predecessors, (67), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-16 14:03:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 982 transitions. [2025-03-16 14:03:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-16 14:03:46,096 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:46,096 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:46,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:46,300 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,SelfDestructingSolverStorable37 [2025-03-16 14:03:46,301 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:46,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1824774332, now seen corresponding path program 1 times [2025-03-16 14:03:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 14:03:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462341446] [2025-03-16 14:03:46,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 14:03:46,309 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 14:03:46,341 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 14:03:46,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:46,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 14:03:46,342 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-16 14:03:46,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 14:03:46,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 14:03:46,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:46,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 14:03:46,370 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-16 14:03:46,371 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-16 14:03:46,375 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 14:03:46,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-03-16 14:03:46,382 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:46,414 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 14:03:46,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 02:03:46 BoogieIcfgContainer [2025-03-16 14:03:46,419 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 14:03:46,419 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 14:03:46,419 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 14:03:46,420 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 14:03:46,420 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:31" (3/4) ... [2025-03-16 14:03:46,421 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-16 14:03:46,422 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 14:03:46,424 INFO L158 Benchmark]: Toolchain (without parser) took 16088.04ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 112.4MB in the beginning and 287.7MB in the end (delta: -175.2MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2025-03-16 14:03:46,424 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 201.3MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:46,424 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.98ms. Allocated memory is still 142.6MB. Free memory was 112.0MB in the beginning and 97.8MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-16 14:03:46,424 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.69ms. Allocated memory is still 142.6MB. Free memory was 97.8MB in the beginning and 96.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:46,424 INFO L158 Benchmark]: Boogie Preprocessor took 32.65ms. Allocated memory is still 142.6MB. Free memory was 96.4MB in the beginning and 94.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:46,425 INFO L158 Benchmark]: IcfgBuilder took 402.98ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 70.0MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-16 14:03:46,425 INFO L158 Benchmark]: TraceAbstraction took 15356.85ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 69.5MB in the beginning and 287.7MB in the end (delta: -218.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:46,425 INFO L158 Benchmark]: Witness Printer took 2.72ms. Allocated memory is still 343.9MB. Free memory was 287.7MB in the beginning and 287.7MB in the end (delta: 69.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 14:03:46,425 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 201.3MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.98ms. Allocated memory is still 142.6MB. Free memory was 112.0MB in the beginning and 97.8MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.69ms. Allocated memory is still 142.6MB. Free memory was 97.8MB in the beginning and 96.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.65ms. Allocated memory is still 142.6MB. Free memory was 96.4MB in the beginning and 94.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 402.98ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 70.0MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 15356.85ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 69.5MB in the beginning and 287.7MB in the end (delta: -218.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.72ms. Allocated memory is still 343.9MB. Free memory was 287.7MB in the beginning and 287.7MB in the end (delta: 69.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 114, overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=127, eb=127] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L81] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, e=0] [L252] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4328521728] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=4328521728, __retres4=4294967295, m=4328521728] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=4328521728, \result=4294967295, m=4328521728] [L253] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=4328521728, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, m=33554432] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, m=33554432] [L254] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, zero=0] [L259] COND TRUE a > zero [L260] tmp = 1 VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, tmp=1, zero=0] [L264] sa = tmp VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, zero=0] [L266] COND FALSE !(b < zero) VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, zero=0] [L269] COND TRUE b > zero [L270] tmp___0 = 1 VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, tmp___0=1] [L274] sb = tmp___0 VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, sb=1] [L277] CALL addflt(a, b) [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [a=4294967295, b=4294967295] [L95] COND FALSE !(a < b) VAL [a=4294967295, b=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [a=4294967295, b=4294967295, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [a=4294967295, b=4294967295, ea=127] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [a=4294967295, ea=127, eb=127, ma=-4278190079, mb=16777215] [L114] EXPR mb | (1U << 24U) VAL [a=4294967295, ea=127, eb=127, ma=-4278190079] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [a=4294967295, ea=127, eb=127, ma=-4278190079, mb=-4278190080] [L116] delta = ea - eb VAL [a=4294967295, delta=0, ea=127, ma=-4278190079, mb=-4278190080] [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) VAL [a=4294967295, delta=0, ea=127, ma=-4278190079, mb=-4278190080] [L118] EXPR mb >> delta VAL [a=4294967295, ea=127, ma=-4278190079] [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb VAL [a=4294967295, ea=127, ma=-8556380159] [L127] ma & (1U << 25U) VAL [a=4294967295, ea=127, ma=-8556380159] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0] [L18] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 91 locations, 150 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.3s, OverallIterations: 39, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2112 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2020 mSDsluCounter, 23460 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 18668 mSDsCounter, 128 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5734 IncrementalHoareTripleChecker+Invalid, 5862 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 128 mSolverCounterUnsat, 4792 mSDtfsCounter, 5734 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1402 GetRequests, 1109 SyntacticMatches, 1 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1168occurred in iteration=34, InterpolantAutomatonStates: 256, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 38 MinimizatonAttempts, 2819 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 2643 NumberOfCodeBlocks, 2626 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 2897 ConstructedInterpolants, 0 QuantifiedInterpolants, 5904 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2258 ConjunctsInSsa, 224 ConjunctsInUnsatCore, 61 InterpolantComputations, 33 PerfectInterpolantSequences, 899/1037 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-16 14:03:46,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/bitvector/soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 14:03:48,257 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 14:03:48,340 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2025-03-16 14:03:48,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 14:03:48,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 14:03:48,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 14:03:48,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 14:03:48,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 14:03:48,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 14:03:48,366 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 14:03:48,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 14:03:48,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 14:03:48,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 14:03:48,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 14:03:48,367 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 14:03:48,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 14:03:48,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 14:03:48,367 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 14:03:48,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 14:03:48,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 14:03:48,368 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 14:03:48,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 14:03:48,368 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 14:03:48,368 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 14:03:48,369 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:48,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-16 14:03:48,369 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 14:03:48,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 14:03:48,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 14:03:48,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 14:03:48,370 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 -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2025-03-16 14:03:48,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 14:03:48,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 14:03:48,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 14:03:48,597 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 14:03:48,598 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 14:03:48,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2025-03-16 14:03:49,729 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e379da91f/93d9a1293912451eab7f54edee2608b2/FLAGb572a2be5 [2025-03-16 14:03:49,933 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 14:03:49,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2025-03-16 14:03:49,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e379da91f/93d9a1293912451eab7f54edee2608b2/FLAGb572a2be5 [2025-03-16 14:03:50,303 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e379da91f/93d9a1293912451eab7f54edee2608b2 [2025-03-16 14:03:50,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 14:03:50,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 14:03:50,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:50,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 14:03:50,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 14:03:50,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10118eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50, skipping insertion in model container [2025-03-16 14:03:50,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,333 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 14:03:50,432 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/bitvector/soft_float_1-2a.c.cil.c[755,768] [2025-03-16 14:03:50,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:50,497 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 14:03:50,508 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/bitvector/soft_float_1-2a.c.cil.c[755,768] [2025-03-16 14:03:50,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 14:03:50,555 INFO L204 MainTranslator]: Completed translation [2025-03-16 14:03:50,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50 WrapperNode [2025-03-16 14:03:50,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 14:03:50,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:50,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 14:03:50,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 14:03:50,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,573 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,594 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2025-03-16 14:03:50,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 14:03:50,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 14:03:50,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 14:03:50,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 14:03:50,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,605 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,619 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-16 14:03:50,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,626 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,631 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 14:03:50,641 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 14:03:50,641 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 14:03:50,641 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 14:03:50,642 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (1/1) ... [2025-03-16 14:03:50,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 14:03:50,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:50,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 14:03:50,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 14:03:50,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 14:03:50,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-16 14:03:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-16 14:03:50,690 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-16 14:03:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 14:03:50,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 14:03:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 14:03:50,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 14:03:50,741 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 14:03:50,742 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 14:03:51,027 INFO L? ?]: Removed 53 outVars from TransFormulas that were not future-live. [2025-03-16 14:03:51,027 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 14:03:51,039 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 14:03:51,040 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 14:03:51,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:51 BoogieIcfgContainer [2025-03-16 14:03:51,040 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 14:03:51,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 14:03:51,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 14:03:51,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 14:03:51,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 02:03:50" (1/3) ... [2025-03-16 14:03:51,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554aa262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:51, skipping insertion in model container [2025-03-16 14:03:51,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 02:03:50" (2/3) ... [2025-03-16 14:03:51,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554aa262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 02:03:51, skipping insertion in model container [2025-03-16 14:03:51,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 02:03:51" (3/3) ... [2025-03-16 14:03:51,049 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2025-03-16 14:03:51,059 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 14:03:51,060 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_1-2a.c.cil.c that has 3 procedures, 67 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 14:03:51,101 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 14:03:51,109 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;@6f3e86e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 14:03:51,110 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 14:03:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-16 14:03:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 14:03:51,118 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:51,119 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:51,119 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1643131456, now seen corresponding path program 1 times [2025-03-16 14:03:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560751995] [2025-03-16 14:03:51,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:51,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:51,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 14:03:51,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 14:03:51,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 14:03:51,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:03:51,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:51,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:51,385 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560751995] [2025-03-16 14:03:51,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560751995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:51,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:51,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2025-03-16 14:03:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412716035] [2025-03-16 14:03:51,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:51,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:03:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:51,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:03:51,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:51,408 INFO L87 Difference]: Start difference. First operand has 67 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 58 states have internal predecessors, (89), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:51,580 INFO L93 Difference]: Finished difference Result 164 states and 273 transitions. [2025-03-16 14:03:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:03:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2025-03-16 14:03:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:51,587 INFO L225 Difference]: With dead ends: 164 [2025-03-16 14:03:51,587 INFO L226 Difference]: Without dead ends: 95 [2025-03-16 14:03:51,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:51,591 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 31 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:51,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 588 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-16 14:03:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2025-03-16 14:03:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.5) internal successors, (117), 81 states have internal predecessors, (117), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2025-03-16 14:03:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 142 transitions. [2025-03-16 14:03:51,626 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 142 transitions. Word has length 31 [2025-03-16 14:03:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:51,627 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 142 transitions. [2025-03-16 14:03:51,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 142 transitions. [2025-03-16 14:03:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 14:03:51,631 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:51,631 INFO L218 NwaCegarLoop]: trace histogram [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, 1] [2025-03-16 14:03:51,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 14:03:51,832 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 [2025-03-16 14:03:51,832 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:51,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1101924992, now seen corresponding path program 1 times [2025-03-16 14:03:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735589091] [2025-03-16 14:03:51,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:51,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:51,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:51,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:51,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 14:03:51,872 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 14:03:51,883 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 14:03:51,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:51,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:51,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:03:51,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:52,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:52,079 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:52,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735589091] [2025-03-16 14:03:52,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735589091] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:52,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:52,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2025-03-16 14:03:52,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441930911] [2025-03-16 14:03:52,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:52,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:03:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:52,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:03:52,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:52,081 INFO L87 Difference]: Start difference. First operand 93 states and 142 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:03:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:52,356 INFO L93 Difference]: Finished difference Result 222 states and 357 transitions. [2025-03-16 14:03:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:03:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2025-03-16 14:03:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:52,358 INFO L225 Difference]: With dead ends: 222 [2025-03-16 14:03:52,358 INFO L226 Difference]: Without dead ends: 158 [2025-03-16 14:03:52,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:52,359 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 50 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:52,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1112 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-03-16 14:03:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 121. [2025-03-16 14:03:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.4) internal successors, (140), 100 states have internal predecessors, (140), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2025-03-16 14:03:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 189 transitions. [2025-03-16 14:03:52,383 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 189 transitions. Word has length 34 [2025-03-16 14:03:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:52,383 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 189 transitions. [2025-03-16 14:03:52,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:03:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 189 transitions. [2025-03-16 14:03:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 14:03:52,385 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:52,385 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:52,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 14:03:52,585 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 [2025-03-16 14:03:52,586 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:52,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:52,586 INFO L85 PathProgramCache]: Analyzing trace with hash -743211943, now seen corresponding path program 1 times [2025-03-16 14:03:52,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:52,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809449868] [2025-03-16 14:03:52,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:52,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:52,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:52,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:52,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 14:03:52,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 14:03:52,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 14:03:52,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:52,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:52,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 14:03:52,673 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:52,673 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:52,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809449868] [2025-03-16 14:03:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809449868] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:52,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:52,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:52,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910276524] [2025-03-16 14:03:52,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:52,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:52,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:52,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:52,674 INFO L87 Difference]: Start difference. First operand 121 states and 189 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:52,726 INFO L93 Difference]: Finished difference Result 233 states and 364 transitions. [2025-03-16 14:03:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2025-03-16 14:03:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:52,729 INFO L225 Difference]: With dead ends: 233 [2025-03-16 14:03:52,731 INFO L226 Difference]: Without dead ends: 114 [2025-03-16 14:03:52,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:52,732 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 22 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:52,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 248 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-03-16 14:03:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2025-03-16 14:03:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 90 states have internal predecessors, (121), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2025-03-16 14:03:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 156 transitions. [2025-03-16 14:03:52,744 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 156 transitions. Word has length 37 [2025-03-16 14:03:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:52,744 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 156 transitions. [2025-03-16 14:03:52,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 156 transitions. [2025-03-16 14:03:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 14:03:52,745 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:52,745 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2025-03-16 14:03:52,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 14:03:52,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:52,946 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:52,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:52,946 INFO L85 PathProgramCache]: Analyzing trace with hash -80952704, now seen corresponding path program 1 times [2025-03-16 14:03:52,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:52,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692813986] [2025-03-16 14:03:52,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:52,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:52,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:52,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:52,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 14:03:52,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 14:03:52,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 14:03:52,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:52,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:52,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 14:03:52,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-16 14:03:53,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:53,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:53,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692813986] [2025-03-16 14:03:53,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692813986] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:53,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:53,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2025-03-16 14:03:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389972410] [2025-03-16 14:03:53,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:53,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:53,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:53,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:53,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:03:53,228 INFO L87 Difference]: Start difference. First operand 104 states and 156 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:53,385 INFO L93 Difference]: Finished difference Result 218 states and 328 transitions. [2025-03-16 14:03:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:03:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2025-03-16 14:03:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:53,386 INFO L225 Difference]: With dead ends: 218 [2025-03-16 14:03:53,386 INFO L226 Difference]: Without dead ends: 165 [2025-03-16 14:03:53,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:53,387 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 36 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:53,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 407 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2025-03-16 14:03:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 125. [2025-03-16 14:03:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 107 states have (on average 1.355140186915888) internal successors, (145), 108 states have internal predecessors, (145), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 16 states have call predecessors, (23), 11 states have call successors, (23) [2025-03-16 14:03:53,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 180 transitions. [2025-03-16 14:03:53,399 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 180 transitions. Word has length 38 [2025-03-16 14:03:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:53,400 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 180 transitions. [2025-03-16 14:03:53,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 180 transitions. [2025-03-16 14:03:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 14:03:53,401 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:53,401 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2025-03-16 14:03:53,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 14:03:53,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,602 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:53,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash -52323553, now seen corresponding path program 1 times [2025-03-16 14:03:53,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:53,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898757200] [2025-03-16 14:03:53,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:53,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:53,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 14:03:53,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 14:03:53,639 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 14:03:53,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:53,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:53,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:03:53,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:53,686 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:53,686 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898757200] [2025-03-16 14:03:53,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898757200] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:53,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:53,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:03:53,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269163020] [2025-03-16 14:03:53,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:53,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:53,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:53,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:53,688 INFO L87 Difference]: Start difference. First operand 125 states and 180 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:53,767 INFO L93 Difference]: Finished difference Result 220 states and 326 transitions. [2025-03-16 14:03:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:53,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2025-03-16 14:03:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:53,769 INFO L225 Difference]: With dead ends: 220 [2025-03-16 14:03:53,769 INFO L226 Difference]: Without dead ends: 161 [2025-03-16 14:03:53,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:53,770 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 30 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:53,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 481 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-16 14:03:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2025-03-16 14:03:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 137 states have (on average 1.364963503649635) internal successors, (187), 140 states have internal predecessors, (187), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 15 states have call successors, (27) [2025-03-16 14:03:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 230 transitions. [2025-03-16 14:03:53,777 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 230 transitions. Word has length 38 [2025-03-16 14:03:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:53,777 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 230 transitions. [2025-03-16 14:03:53,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 230 transitions. [2025-03-16 14:03:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:53,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:53,778 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:53,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 14:03:53,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,979 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:53,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2081385955, now seen corresponding path program 1 times [2025-03-16 14:03:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:53,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237979793] [2025-03-16 14:03:53,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:53,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:53,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:53,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 14:03:54,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:54,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:54,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:54,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:54,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:54,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:54,052 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237979793] [2025-03-16 14:03:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237979793] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:54,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:54,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077799768] [2025-03-16 14:03:54,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:54,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:54,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:54,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:54,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:54,054 INFO L87 Difference]: Start difference. First operand 159 states and 230 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:54,070 INFO L93 Difference]: Finished difference Result 234 states and 342 transitions. [2025-03-16 14:03:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-03-16 14:03:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:54,073 INFO L225 Difference]: With dead ends: 234 [2025-03-16 14:03:54,073 INFO L226 Difference]: Without dead ends: 168 [2025-03-16 14:03:54,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:54,074 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:54,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 275 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-03-16 14:03:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2025-03-16 14:03:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 148 states have (on average 1.304054054054054) internal successors, (193), 149 states have internal predecessors, (193), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2025-03-16 14:03:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2025-03-16 14:03:54,088 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 41 [2025-03-16 14:03:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:54,088 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2025-03-16 14:03:54,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2025-03-16 14:03:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:54,089 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:54,089 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2025-03-16 14:03:54,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 14:03:54,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:54,290 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:54,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1421780470, now seen corresponding path program 2 times [2025-03-16 14:03:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:54,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174568593] [2025-03-16 14:03:54,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 14:03:54,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:54,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:54,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 14:03:54,324 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 41 statements into 2 equivalence classes. [2025-03-16 14:03:54,331 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 41 statements. [2025-03-16 14:03:54,332 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-16 14:03:54,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:03:54,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:03:54,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:54,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174568593] [2025-03-16 14:03:54,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174568593] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:54,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:54,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-16 14:03:54,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702427403] [2025-03-16 14:03:54,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:54,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 14:03:54,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:54,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 14:03:54,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2025-03-16 14:03:54,454 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:54,665 INFO L93 Difference]: Finished difference Result 287 states and 400 transitions. [2025-03-16 14:03:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:03:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-03-16 14:03:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:54,668 INFO L225 Difference]: With dead ends: 287 [2025-03-16 14:03:54,668 INFO L226 Difference]: Without dead ends: 251 [2025-03-16 14:03:54,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:03:54,669 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 56 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:54,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1155 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2025-03-16 14:03:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2025-03-16 14:03:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 221 states have (on average 1.3122171945701357) internal successors, (290), 220 states have internal predecessors, (290), 20 states have call successors, (20), 3 states have call predecessors, (20), 6 states have return successors, (31), 27 states have call predecessors, (31), 19 states have call successors, (31) [2025-03-16 14:03:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 341 transitions. [2025-03-16 14:03:54,688 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 341 transitions. Word has length 41 [2025-03-16 14:03:54,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:54,689 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 341 transitions. [2025-03-16 14:03:54,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 341 transitions. [2025-03-16 14:03:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:54,690 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:54,690 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:54,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 14:03:54,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:54,891 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:54,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash -342725053, now seen corresponding path program 1 times [2025-03-16 14:03:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044020911] [2025-03-16 14:03:54,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:54,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:54,893 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:03:54,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 14:03:54,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:54,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:54,935 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:54,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:54,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:03:54,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:54,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:55,021 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:55,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044020911] [2025-03-16 14:03:55,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044020911] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:03:55,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:55,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2025-03-16 14:03:55,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209144021] [2025-03-16 14:03:55,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:55,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:03:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:55,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:03:55,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:55,022 INFO L87 Difference]: Start difference. First operand 248 states and 341 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:55,123 INFO L93 Difference]: Finished difference Result 418 states and 601 transitions. [2025-03-16 14:03:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 14:03:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2025-03-16 14:03:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:55,126 INFO L225 Difference]: With dead ends: 418 [2025-03-16 14:03:55,127 INFO L226 Difference]: Without dead ends: 334 [2025-03-16 14:03:55,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:03:55,128 INFO L435 NwaCegarLoop]: 125 mSDtfsCounter, 44 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:55,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 694 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2025-03-16 14:03:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2025-03-16 14:03:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 295 states have (on average 1.3288135593220338) internal successors, (392), 297 states have internal predecessors, (392), 30 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2025-03-16 14:03:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 463 transitions. [2025-03-16 14:03:55,146 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 463 transitions. Word has length 41 [2025-03-16 14:03:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:55,146 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 463 transitions. [2025-03-16 14:03:55,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 463 transitions. [2025-03-16 14:03:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:55,147 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:55,147 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:55,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 14:03:55,348 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 [2025-03-16 14:03:55,348 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:55,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash -314095902, now seen corresponding path program 1 times [2025-03-16 14:03:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:55,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278429720] [2025-03-16 14:03:55,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:55,351 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) [2025-03-16 14:03:55,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 14:03:55,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:55,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:55,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:55,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:03:55,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:55,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:55,619 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:55,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278429720] [2025-03-16 14:03:55,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278429720] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:55,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1915357219] [2025-03-16 14:03:55,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:55,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:03:55,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:03:55,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:03:55,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2025-03-16 14:03:55,680 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:55,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:55,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:55,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:55,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:03:55,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:55,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1915357219] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:55,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:03:55,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2025-03-16 14:03:55,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726809805] [2025-03-16 14:03:55,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:03:55,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:55,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:55,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:55,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:55,788 INFO L87 Difference]: Start difference. First operand 332 states and 463 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:55,959 INFO L93 Difference]: Finished difference Result 344 states and 473 transitions. [2025-03-16 14:03:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:03:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2025-03-16 14:03:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:55,961 INFO L225 Difference]: With dead ends: 344 [2025-03-16 14:03:55,961 INFO L226 Difference]: Without dead ends: 342 [2025-03-16 14:03:55,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:03:55,962 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 46 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:55,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1083 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2025-03-16 14:03:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 340. [2025-03-16 14:03:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 301 states have (on average 1.3222591362126246) internal successors, (398), 303 states have internal predecessors, (398), 30 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2025-03-16 14:03:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 469 transitions. [2025-03-16 14:03:55,977 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 469 transitions. Word has length 41 [2025-03-16 14:03:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:55,977 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 469 transitions. [2025-03-16 14:03:55,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:03:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 469 transitions. [2025-03-16 14:03:55,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:55,979 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:55,979 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2025-03-16 14:03:55,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2025-03-16 14:03:56,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 14:03:56,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:56,381 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,382 INFO L85 PathProgramCache]: Analyzing trace with hash -887752112, now seen corresponding path program 1 times [2025-03-16 14:03:56,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:56,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396769292] [2025-03-16 14:03:56,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:56,384 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) [2025-03-16 14:03:56,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 14:03:56,413 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:56,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:56,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:03:56,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:56,495 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:56,495 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:56,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396769292] [2025-03-16 14:03:56,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396769292] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824966233] [2025-03-16 14:03:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:56,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:56,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:56,496 INFO L87 Difference]: Start difference. First operand 340 states and 469 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,582 INFO L93 Difference]: Finished difference Result 361 states and 494 transitions. [2025-03-16 14:03:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-03-16 14:03:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,584 INFO L225 Difference]: With dead ends: 361 [2025-03-16 14:03:56,587 INFO L226 Difference]: Without dead ends: 359 [2025-03-16 14:03:56,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:56,588 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 3 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 445 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2025-03-16 14:03:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 348. [2025-03-16 14:03:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 306 states have (on average 1.3235294117647058) internal successors, (405), 310 states have internal predecessors, (405), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 37 states have call predecessors, (43), 31 states have call successors, (43) [2025-03-16 14:03:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 480 transitions. [2025-03-16 14:03:56,623 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 480 transitions. Word has length 41 [2025-03-16 14:03:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,623 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 480 transitions. [2025-03-16 14:03:56,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 480 transitions. [2025-03-16 14:03:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-16 14:03:56,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,624 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2025-03-16 14:03:56,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 14:03:56,824 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 [2025-03-16 14:03:56,824 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:56,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash -859122961, now seen corresponding path program 1 times [2025-03-16 14:03:56,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:56,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245564614] [2025-03-16 14:03:56,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:56,827 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) [2025-03-16 14:03:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 14:03:56,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-16 14:03:56,867 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-16 14:03:56,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:56,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:56,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 14:03:56,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:56,922 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:56,922 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245564614] [2025-03-16 14:03:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245564614] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:56,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:56,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:03:56,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765035316] [2025-03-16 14:03:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:56,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:03:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:56,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:03:56,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:56,923 INFO L87 Difference]: Start difference. First operand 348 states and 480 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:56,983 INFO L93 Difference]: Finished difference Result 354 states and 485 transitions. [2025-03-16 14:03:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:56,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2025-03-16 14:03:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:56,985 INFO L225 Difference]: With dead ends: 354 [2025-03-16 14:03:56,985 INFO L226 Difference]: Without dead ends: 352 [2025-03-16 14:03:56,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:56,985 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 3 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:56,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 440 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2025-03-16 14:03:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2025-03-16 14:03:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 304 states have (on average 1.319078947368421) internal successors, (401), 306 states have internal predecessors, (401), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2025-03-16 14:03:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 472 transitions. [2025-03-16 14:03:56,997 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 472 transitions. Word has length 41 [2025-03-16 14:03:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:56,997 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 472 transitions. [2025-03-16 14:03:56,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 472 transitions. [2025-03-16 14:03:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:56,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:56,998 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 14:03:57,198 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 [2025-03-16 14:03:57,198 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:57,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash -436882920, now seen corresponding path program 1 times [2025-03-16 14:03:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933321499] [2025-03-16 14:03:57,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:57,201 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) [2025-03-16 14:03:57,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 14:03:57,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:57,234 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:57,234 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:57,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:57,244 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:57,244 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:57,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933321499] [2025-03-16 14:03:57,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933321499] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:57,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:57,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:57,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960918194] [2025-03-16 14:03:57,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:57,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:57,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:57,245 INFO L87 Difference]: Start difference. First operand 344 states and 472 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,260 INFO L93 Difference]: Finished difference Result 357 states and 487 transitions. [2025-03-16 14:03:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,262 INFO L225 Difference]: With dead ends: 357 [2025-03-16 14:03:57,262 INFO L226 Difference]: Without dead ends: 350 [2025-03-16 14:03:57,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:57,263 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 0 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 273 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-16 14:03:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2025-03-16 14:03:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 310 states have (on average 1.3129032258064517) internal successors, (407), 312 states have internal predecessors, (407), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2025-03-16 14:03:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 478 transitions. [2025-03-16 14:03:57,277 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 478 transitions. Word has length 42 [2025-03-16 14:03:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,277 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 478 transitions. [2025-03-16 14:03:57,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 478 transitions. [2025-03-16 14:03:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:57,278 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,278 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 14:03:57,483 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 [2025-03-16 14:03:57,483 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:57,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:57,483 INFO L85 PathProgramCache]: Analyzing trace with hash 450620761, now seen corresponding path program 1 times [2025-03-16 14:03:57,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:57,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4606652] [2025-03-16 14:03:57,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:57,485 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) [2025-03-16 14:03:57,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 14:03:57,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:57,522 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:57,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:57,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:57,540 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:57,540 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:57,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4606652] [2025-03-16 14:03:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4606652] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:57,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:57,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:03:57,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027649149] [2025-03-16 14:03:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:57,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:57,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:57,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:57,541 INFO L87 Difference]: Start difference. First operand 350 states and 478 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,565 INFO L93 Difference]: Finished difference Result 357 states and 484 transitions. [2025-03-16 14:03:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,567 INFO L225 Difference]: With dead ends: 357 [2025-03-16 14:03:57,567 INFO L226 Difference]: Without dead ends: 350 [2025-03-16 14:03:57,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:03:57,568 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 3 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 363 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-16 14:03:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 344. [2025-03-16 14:03:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 304 states have (on average 1.305921052631579) internal successors, (397), 306 states have internal predecessors, (397), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2025-03-16 14:03:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 468 transitions. [2025-03-16 14:03:57,578 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 468 transitions. Word has length 42 [2025-03-16 14:03:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,578 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 468 transitions. [2025-03-16 14:03:57,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 468 transitions. [2025-03-16 14:03:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-03-16 14:03:57,579 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,579 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 14:03:57,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,783 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:57,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:57,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2128105317, now seen corresponding path program 1 times [2025-03-16 14:03:57,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910162499] [2025-03-16 14:03:57,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:57,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:57,785 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) [2025-03-16 14:03:57,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 14:03:57,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-16 14:03:57,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-16 14:03:57,821 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:57,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:57,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:57,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:57,837 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:57,837 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:57,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910162499] [2025-03-16 14:03:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910162499] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392864878] [2025-03-16 14:03:57,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:57,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:57,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:57,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:57,838 INFO L87 Difference]: Start difference. First operand 344 states and 468 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:57,859 INFO L93 Difference]: Finished difference Result 568 states and 793 transitions. [2025-03-16 14:03:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:57,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2025-03-16 14:03:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:57,861 INFO L225 Difference]: With dead ends: 568 [2025-03-16 14:03:57,861 INFO L226 Difference]: Without dead ends: 476 [2025-03-16 14:03:57,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:57,862 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 28 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:57,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 274 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2025-03-16 14:03:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 393. [2025-03-16 14:03:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 349 states have (on average 1.3065902578796562) internal successors, (456), 349 states have internal predecessors, (456), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2025-03-16 14:03:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 535 transitions. [2025-03-16 14:03:57,882 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 535 transitions. Word has length 42 [2025-03-16 14:03:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:57,883 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 535 transitions. [2025-03-16 14:03:57,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 535 transitions. [2025-03-16 14:03:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:57,883 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:57,884 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:57,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 14:03:58,084 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 [2025-03-16 14:03:58,084 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:58,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1022934109, now seen corresponding path program 1 times [2025-03-16 14:03:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312206969] [2025-03-16 14:03:58,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:58,087 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) [2025-03-16 14:03:58,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 14:03:58,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:58,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:58,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 14:03:58,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:03:58,136 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:58,137 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:58,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312206969] [2025-03-16 14:03:58,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312206969] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:58,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:58,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364506948] [2025-03-16 14:03:58,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:58,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:58,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:58,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:58,138 INFO L87 Difference]: Start difference. First operand 393 states and 535 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:58,184 INFO L93 Difference]: Finished difference Result 519 states and 712 transitions. [2025-03-16 14:03:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2025-03-16 14:03:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:58,186 INFO L225 Difference]: With dead ends: 519 [2025-03-16 14:03:58,186 INFO L226 Difference]: Without dead ends: 468 [2025-03-16 14:03:58,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:58,187 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 40 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:58,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 271 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2025-03-16 14:03:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 401. [2025-03-16 14:03:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 357 states have (on average 1.2997198879551821) internal successors, (464), 357 states have internal predecessors, (464), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2025-03-16 14:03:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 543 transitions. [2025-03-16 14:03:58,204 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 543 transitions. Word has length 45 [2025-03-16 14:03:58,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:58,204 INFO L471 AbstractCegarLoop]: Abstraction has 401 states and 543 transitions. [2025-03-16 14:03:58,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:58,204 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 543 transitions. [2025-03-16 14:03:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:58,205 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:58,205 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:58,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:58,406 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 [2025-03-16 14:03:58,406 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:58,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1750544126, now seen corresponding path program 1 times [2025-03-16 14:03:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787744495] [2025-03-16 14:03:58,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:58,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:58,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:58,409 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) [2025-03-16 14:03:58,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 14:03:58,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:58,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:58,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:58,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:58,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 14:03:58,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:03:58,553 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:58,553 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787744495] [2025-03-16 14:03:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787744495] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:58,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:58,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-16 14:03:58,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317194895] [2025-03-16 14:03:58,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:58,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:03:58,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:58,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:03:58,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:03:58,554 INFO L87 Difference]: Start difference. First operand 401 states and 543 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:58,796 INFO L93 Difference]: Finished difference Result 445 states and 604 transitions. [2025-03-16 14:03:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:03:58,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2025-03-16 14:03:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:58,798 INFO L225 Difference]: With dead ends: 445 [2025-03-16 14:03:58,798 INFO L226 Difference]: Without dead ends: 422 [2025-03-16 14:03:58,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:03:58,799 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 67 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:58,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 840 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:03:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2025-03-16 14:03:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 418. [2025-03-16 14:03:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 372 states have (on average 1.2983870967741935) internal successors, (483), 373 states have internal predecessors, (483), 36 states have call successors, (36), 6 states have call predecessors, (36), 9 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2025-03-16 14:03:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 566 transitions. [2025-03-16 14:03:58,819 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 566 transitions. Word has length 45 [2025-03-16 14:03:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:58,819 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 566 transitions. [2025-03-16 14:03:58,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 566 transitions. [2025-03-16 14:03:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-16 14:03:58,820 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:58,820 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2025-03-16 14:03:58,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 14:03:59,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,021 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:59,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1682180299, now seen corresponding path program 1 times [2025-03-16 14:03:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:59,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855827286] [2025-03-16 14:03:59,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:59,023 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) [2025-03-16 14:03:59,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 14:03:59,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-16 14:03:59,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-16 14:03:59,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 14:03:59,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:03:59,078 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:59,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:59,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855827286] [2025-03-16 14:03:59,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855827286] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:59,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:59,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 14:03:59,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728199830] [2025-03-16 14:03:59,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:59,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:59,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:59,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 14:03:59,079 INFO L87 Difference]: Start difference. First operand 418 states and 566 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:59,149 INFO L93 Difference]: Finished difference Result 492 states and 672 transitions. [2025-03-16 14:03:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:03:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2025-03-16 14:03:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:59,151 INFO L225 Difference]: With dead ends: 492 [2025-03-16 14:03:59,151 INFO L226 Difference]: Without dead ends: 439 [2025-03-16 14:03:59,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:03:59,151 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 56 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:59,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 338 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2025-03-16 14:03:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 400. [2025-03-16 14:03:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 356 states have (on average 1.2921348314606742) internal successors, (460), 356 states have internal predecessors, (460), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2025-03-16 14:03:59,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 539 transitions. [2025-03-16 14:03:59,165 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 539 transitions. Word has length 45 [2025-03-16 14:03:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:59,165 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 539 transitions. [2025-03-16 14:03:59,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:59,165 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 539 transitions. [2025-03-16 14:03:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:59,166 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:59,166 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:59,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 14:03:59,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,366 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:59,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1752985596, now seen corresponding path program 1 times [2025-03-16 14:03:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:59,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842826633] [2025-03-16 14:03:59,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:59,369 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) [2025-03-16 14:03:59,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 14:03:59,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:59,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:59,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:03:59,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:03:59,476 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:03:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:59,525 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842826633] [2025-03-16 14:03:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842826633] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:03:59,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:03:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-03-16 14:03:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81142195] [2025-03-16 14:03:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:59,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:03:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:59,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:03:59,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:59,526 INFO L87 Difference]: Start difference. First operand 400 states and 539 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:59,643 INFO L93 Difference]: Finished difference Result 575 states and 795 transitions. [2025-03-16 14:03:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 14:03:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2025-03-16 14:03:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:59,646 INFO L225 Difference]: With dead ends: 575 [2025-03-16 14:03:59,646 INFO L226 Difference]: Without dead ends: 535 [2025-03-16 14:03:59,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:03:59,647 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 22 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:59,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 341 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:03:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2025-03-16 14:03:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 431. [2025-03-16 14:03:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 381 states have (on average 1.2808398950131235) internal successors, (488), 381 states have internal predecessors, (488), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (51), 47 states have call predecessors, (51), 39 states have call successors, (51) [2025-03-16 14:03:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 579 transitions. [2025-03-16 14:03:59,662 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 579 transitions. Word has length 46 [2025-03-16 14:03:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:59,662 INFO L471 AbstractCegarLoop]: Abstraction has 431 states and 579 transitions. [2025-03-16 14:03:59,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:59,662 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 579 transitions. [2025-03-16 14:03:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-16 14:03:59,663 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:59,663 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:59,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 14:03:59,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,867 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:03:59,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:03:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -43965763, now seen corresponding path program 1 times [2025-03-16 14:03:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:03:59,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850962699] [2025-03-16 14:03:59,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:03:59,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:03:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:03:59,870 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) [2025-03-16 14:03:59,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 14:03:59,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-16 14:03:59,912 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-16 14:03:59,912 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:03:59,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:03:59,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:03:59,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:03:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:03:59,923 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:03:59,923 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:03:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850962699] [2025-03-16 14:03:59,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850962699] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:03:59,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:03:59,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:03:59,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796180343] [2025-03-16 14:03:59,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:03:59,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:03:59,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:03:59,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:03:59,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:59,924 INFO L87 Difference]: Start difference. First operand 431 states and 579 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:03:59,941 INFO L93 Difference]: Finished difference Result 450 states and 600 transitions. [2025-03-16 14:03:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:03:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2025-03-16 14:03:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:03:59,943 INFO L225 Difference]: With dead ends: 450 [2025-03-16 14:03:59,943 INFO L226 Difference]: Without dead ends: 408 [2025-03-16 14:03:59,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:03:59,943 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:03:59,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 270 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:03:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2025-03-16 14:03:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 404. [2025-03-16 14:03:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 354 states have (on average 1.2853107344632768) internal successors, (455), 355 states have internal predecessors, (455), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2025-03-16 14:03:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 544 transitions. [2025-03-16 14:03:59,958 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 544 transitions. Word has length 46 [2025-03-16 14:03:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:03:59,958 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 544 transitions. [2025-03-16 14:03:59,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:03:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 544 transitions. [2025-03-16 14:03:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:03:59,959 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:03:59,959 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:03:59,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:00,159 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 [2025-03-16 14:04:00,159 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:00,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -531127959, now seen corresponding path program 1 times [2025-03-16 14:04:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:00,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019665380] [2025-03-16 14:04:00,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:00,162 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) [2025-03-16 14:04:00,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 14:04:00,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:00,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:00,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:00,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:00,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:00,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:00,290 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:00,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:00,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019665380] [2025-03-16 14:04:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019665380] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:00,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-16 14:04:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338079048] [2025-03-16 14:04:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:00,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:04:00,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:00,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:04:00,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:04:00,291 INFO L87 Difference]: Start difference. First operand 404 states and 544 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:00,470 INFO L93 Difference]: Finished difference Result 472 states and 638 transitions. [2025-03-16 14:04:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:00,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2025-03-16 14:04:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:00,472 INFO L225 Difference]: With dead ends: 472 [2025-03-16 14:04:00,472 INFO L226 Difference]: Without dead ends: 436 [2025-03-16 14:04:00,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:00,473 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 61 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:00,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 631 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:00,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2025-03-16 14:04:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 428. [2025-03-16 14:04:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 374 states have (on average 1.2727272727272727) internal successors, (476), 377 states have internal predecessors, (476), 44 states have call successors, (44), 6 states have call predecessors, (44), 9 states have return successors, (52), 49 states have call predecessors, (52), 42 states have call successors, (52) [2025-03-16 14:04:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 572 transitions. [2025-03-16 14:04:00,497 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 572 transitions. Word has length 47 [2025-03-16 14:04:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:00,497 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 572 transitions. [2025-03-16 14:04:00,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 572 transitions. [2025-03-16 14:04:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:00,499 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:00,499 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:00,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 14:04:00,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:00,700 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:00,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash 559669180, now seen corresponding path program 1 times [2025-03-16 14:04:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920664040] [2025-03-16 14:04:00,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:00,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:00,703 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:00,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 14:04:00,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:00,749 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:00,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:00,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:00,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:04:00,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:04:00,788 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:00,788 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:00,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920664040] [2025-03-16 14:04:00,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920664040] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:00,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:00,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:04:00,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066499390] [2025-03-16 14:04:00,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:00,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:00,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:00,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:00,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:00,789 INFO L87 Difference]: Start difference. First operand 428 states and 572 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:00,913 INFO L93 Difference]: Finished difference Result 550 states and 744 transitions. [2025-03-16 14:04:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2025-03-16 14:04:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:00,915 INFO L225 Difference]: With dead ends: 550 [2025-03-16 14:04:00,915 INFO L226 Difference]: Without dead ends: 526 [2025-03-16 14:04:00,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:00,916 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 26 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:00,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 431 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2025-03-16 14:04:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 443. [2025-03-16 14:04:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 385 states have (on average 1.283116883116883) internal successors, (494), 390 states have internal predecessors, (494), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2025-03-16 14:04:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 598 transitions. [2025-03-16 14:04:00,939 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 598 transitions. Word has length 47 [2025-03-16 14:04:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:00,939 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 598 transitions. [2025-03-16 14:04:00,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 598 transitions. [2025-03-16 14:04:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:00,940 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:00,940 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:00,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:01,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,140 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:01,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -202595714, now seen corresponding path program 1 times [2025-03-16 14:04:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:01,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110332889] [2025-03-16 14:04:01,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:01,143 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:01,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 14:04:01,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:01,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:01,176 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:01,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:01,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:04:01,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:04:01,196 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:01,196 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110332889] [2025-03-16 14:04:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110332889] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:01,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:01,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:04:01,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587473322] [2025-03-16 14:04:01,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:01,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:04:01,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:01,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:04:01,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:04:01,197 INFO L87 Difference]: Start difference. First operand 443 states and 598 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:01,229 INFO L93 Difference]: Finished difference Result 490 states and 657 transitions. [2025-03-16 14:04:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:04:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2025-03-16 14:04:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:01,232 INFO L225 Difference]: With dead ends: 490 [2025-03-16 14:04:01,232 INFO L226 Difference]: Without dead ends: 443 [2025-03-16 14:04:01,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:04:01,233 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 26 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:01,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 264 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2025-03-16 14:04:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2025-03-16 14:04:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 385 states have (on average 1.2285714285714286) internal successors, (473), 390 states have internal predecessors, (473), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2025-03-16 14:04:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 577 transitions. [2025-03-16 14:04:01,259 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 577 transitions. Word has length 47 [2025-03-16 14:04:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:01,259 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 577 transitions. [2025-03-16 14:04:01,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 577 transitions. [2025-03-16 14:04:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 14:04:01,261 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:01,261 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:01,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 14:04:01,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,462 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:01,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:01,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1981733300, now seen corresponding path program 1 times [2025-03-16 14:04:01,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:01,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604321834] [2025-03-16 14:04:01,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:01,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:01,465 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:01,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 14:04:01,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-16 14:04:01,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 14:04:01,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:01,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:01,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 14:04:01,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:01,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:01,594 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:01,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604321834] [2025-03-16 14:04:01,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604321834] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:01,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:01,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2025-03-16 14:04:01,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916465844] [2025-03-16 14:04:01,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:01,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:04:01,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:01,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:04:01,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:04:01,595 INFO L87 Difference]: Start difference. First operand 443 states and 577 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:01,653 INFO L93 Difference]: Finished difference Result 471 states and 610 transitions. [2025-03-16 14:04:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2025-03-16 14:04:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:01,655 INFO L225 Difference]: With dead ends: 471 [2025-03-16 14:04:01,655 INFO L226 Difference]: Without dead ends: 437 [2025-03-16 14:04:01,655 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-16 14:04:01,655 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 20 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:01,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 541 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2025-03-16 14:04:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 422. [2025-03-16 14:04:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 364 states have (on average 1.2307692307692308) internal successors, (448), 370 states have internal predecessors, (448), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 51 states have call predecessors, (56), 46 states have call successors, (56) [2025-03-16 14:04:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 552 transitions. [2025-03-16 14:04:01,676 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 552 transitions. Word has length 47 [2025-03-16 14:04:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:01,676 INFO L471 AbstractCegarLoop]: Abstraction has 422 states and 552 transitions. [2025-03-16 14:04:01,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 14:04:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 552 transitions. [2025-03-16 14:04:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:04:01,677 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:01,677 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:01,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-16 14:04:01,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,878 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:01,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash 195267623, now seen corresponding path program 1 times [2025-03-16 14:04:01,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:01,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624087767] [2025-03-16 14:04:01,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:01,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:01,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:01,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:01,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 14:04:01,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:04:01,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:04:01,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:01,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:01,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:04:01,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:04:01,932 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:01,933 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:01,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624087767] [2025-03-16 14:04:01,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624087767] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:01,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:01,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:04:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018507064] [2025-03-16 14:04:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:01,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:04:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:01,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:04:01,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:04:01,934 INFO L87 Difference]: Start difference. First operand 422 states and 552 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:01,950 INFO L93 Difference]: Finished difference Result 431 states and 560 transitions. [2025-03-16 14:04:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:04:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2025-03-16 14:04:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:01,953 INFO L225 Difference]: With dead ends: 431 [2025-03-16 14:04:01,953 INFO L226 Difference]: Without dead ends: 387 [2025-03-16 14:04:01,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:04:01,953 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 0 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:01,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2025-03-16 14:04:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 350. [2025-03-16 14:04:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 302 states have (on average 1.228476821192053) internal successors, (371), 307 states have internal predecessors, (371), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (43), 40 states have call predecessors, (43), 36 states have call successors, (43) [2025-03-16 14:04:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 452 transitions. [2025-03-16 14:04:01,967 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 452 transitions. Word has length 49 [2025-03-16 14:04:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:01,967 INFO L471 AbstractCegarLoop]: Abstraction has 350 states and 452 transitions. [2025-03-16 14:04:01,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 452 transitions. [2025-03-16 14:04:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-16 14:04:01,968 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:01,968 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:01,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:02,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,169 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:02,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1766741643, now seen corresponding path program 1 times [2025-03-16 14:04:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034077070] [2025-03-16 14:04:02,170 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:02,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:02,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:02,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-16 14:04:02,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-16 14:04:02,217 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-16 14:04:02,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:02,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:02,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:04:02,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-16 14:04:02,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:04:02,348 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:02,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034077070] [2025-03-16 14:04:02,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034077070] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:02,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:02,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-03-16 14:04:02,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738682854] [2025-03-16 14:04:02,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:02,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:04:02,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:02,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:04:02,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:02,349 INFO L87 Difference]: Start difference. First operand 350 states and 452 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:02,453 INFO L93 Difference]: Finished difference Result 422 states and 542 transitions. [2025-03-16 14:04:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2025-03-16 14:04:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:02,455 INFO L225 Difference]: With dead ends: 422 [2025-03-16 14:04:02,455 INFO L226 Difference]: Without dead ends: 364 [2025-03-16 14:04:02,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:02,455 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 22 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:02,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 265 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2025-03-16 14:04:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 339. [2025-03-16 14:04:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 291 states have (on average 1.2268041237113403) internal successors, (357), 295 states have internal predecessors, (357), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2025-03-16 14:04:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 436 transitions. [2025-03-16 14:04:02,475 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 436 transitions. Word has length 49 [2025-03-16 14:04:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:02,475 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 436 transitions. [2025-03-16 14:04:02,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2025-03-16 14:04:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 436 transitions. [2025-03-16 14:04:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 14:04:02,478 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:02,478 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:02,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-16 14:04:02,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,679 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:02,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash 930718269, now seen corresponding path program 1 times [2025-03-16 14:04:02,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:02,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790670222] [2025-03-16 14:04:02,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:02,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:02,682 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:02,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-16 14:04:02,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:02,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:02,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:02,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:02,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 14:04:02,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:02,887 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:02,887 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:02,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790670222] [2025-03-16 14:04:02,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790670222] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:02,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:02,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-16 14:04:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455660742] [2025-03-16 14:04:02,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:02,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:04:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:02,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:04:02,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:02,889 INFO L87 Difference]: Start difference. First operand 339 states and 436 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:04:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:03,116 INFO L93 Difference]: Finished difference Result 420 states and 539 transitions. [2025-03-16 14:04:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-16 14:04:03,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2025-03-16 14:04:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:03,118 INFO L225 Difference]: With dead ends: 420 [2025-03-16 14:04:03,118 INFO L226 Difference]: Without dead ends: 378 [2025-03-16 14:04:03,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:04:03,119 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 88 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:03,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 736 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2025-03-16 14:04:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 339. [2025-03-16 14:04:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 291 states have (on average 1.2164948453608246) internal successors, (354), 295 states have internal predecessors, (354), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2025-03-16 14:04:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 433 transitions. [2025-03-16 14:04:03,137 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 433 transitions. Word has length 51 [2025-03-16 14:04:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:03,137 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 433 transitions. [2025-03-16 14:04:03,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-16 14:04:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 433 transitions. [2025-03-16 14:04:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 14:04:03,138 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:03,138 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:03,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-16 14:04:03,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:03,338 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:03,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:03,339 INFO L85 PathProgramCache]: Analyzing trace with hash 385691210, now seen corresponding path program 1 times [2025-03-16 14:04:03,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:03,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648191230] [2025-03-16 14:04:03,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:03,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:03,340 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-16 14:04:03,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:03,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:03,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:03,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:03,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-16 14:04:03,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:03,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:03,679 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648191230] [2025-03-16 14:04:03,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648191230] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:03,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086377080] [2025-03-16 14:04:03,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:03,681 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:03,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2025-03-16 14:04:03,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:03,740 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:03,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:03,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:03,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-16 14:04:03,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:03,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:03,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086377080] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:03,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:03,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2025-03-16 14:04:03,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349384392] [2025-03-16 14:04:03,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:03,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:04:03,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:03,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:04:03,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:04:03,933 INFO L87 Difference]: Start difference. First operand 339 states and 433 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:04,217 INFO L93 Difference]: Finished difference Result 415 states and 533 transitions. [2025-03-16 14:04:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2025-03-16 14:04:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:04,218 INFO L225 Difference]: With dead ends: 415 [2025-03-16 14:04:04,218 INFO L226 Difference]: Without dead ends: 377 [2025-03-16 14:04:04,219 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2025-03-16 14:04:04,219 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 41 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:04,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 880 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2025-03-16 14:04:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 339. [2025-03-16 14:04:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 291 states have (on average 1.2096219931271477) internal successors, (352), 295 states have internal predecessors, (352), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2025-03-16 14:04:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 431 transitions. [2025-03-16 14:04:04,232 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 431 transitions. Word has length 51 [2025-03-16 14:04:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:04,232 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 431 transitions. [2025-03-16 14:04:04,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 431 transitions. [2025-03-16 14:04:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 14:04:04,233 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:04,233 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:04,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2025-03-16 14:04:04,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-16 14:04:04,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:04,634 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:04,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1895209941, now seen corresponding path program 1 times [2025-03-16 14:04:04,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:04,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502084095] [2025-03-16 14:04:04,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:04,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:04,636 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:04,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-16 14:04:04,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:04,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:04,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:04,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:04,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 14:04:04,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:04,806 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:04,806 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502084095] [2025-03-16 14:04:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502084095] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:04,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:04,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-16 14:04:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240431665] [2025-03-16 14:04:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:04,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:04:04,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:04,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:04:04,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:04,807 INFO L87 Difference]: Start difference. First operand 339 states and 431 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:05,062 INFO L93 Difference]: Finished difference Result 405 states and 513 transitions. [2025-03-16 14:04:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 14:04:05,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2025-03-16 14:04:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:05,064 INFO L225 Difference]: With dead ends: 405 [2025-03-16 14:04:05,064 INFO L226 Difference]: Without dead ends: 354 [2025-03-16 14:04:05,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:04:05,064 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 51 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:05,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 722 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2025-03-16 14:04:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 339. [2025-03-16 14:04:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 291 states have (on average 1.1993127147766323) internal successors, (349), 295 states have internal predecessors, (349), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2025-03-16 14:04:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 428 transitions. [2025-03-16 14:04:05,078 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 428 transitions. Word has length 51 [2025-03-16 14:04:05,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:05,078 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 428 transitions. [2025-03-16 14:04:05,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 428 transitions. [2025-03-16 14:04:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 14:04:05,079 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:05,079 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:05,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-16 14:04:05,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:05,280 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:05,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1854730296, now seen corresponding path program 1 times [2025-03-16 14:04:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:05,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156893637] [2025-03-16 14:04:05,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:05,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:05,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:05,283 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:05,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-16 14:04:05,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:05,327 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:05,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:05,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:05,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:05,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:05,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:05,614 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:05,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156893637] [2025-03-16 14:04:05,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156893637] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:05,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [63454766] [2025-03-16 14:04:05,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:05,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:05,616 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:05,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2025-03-16 14:04:05,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 14:04:05,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 14:04:05,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:05,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:05,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:05,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:05,744 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [63454766] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:05,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:05,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2025-03-16 14:04:05,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699381263] [2025-03-16 14:04:05,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:05,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:05,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:05,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-03-16 14:04:05,745 INFO L87 Difference]: Start difference. First operand 339 states and 428 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:05,892 INFO L93 Difference]: Finished difference Result 355 states and 446 transitions. [2025-03-16 14:04:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:05,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2025-03-16 14:04:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:05,894 INFO L225 Difference]: With dead ends: 355 [2025-03-16 14:04:05,894 INFO L226 Difference]: Without dead ends: 353 [2025-03-16 14:04:05,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:05,894 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 7 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:05,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 401 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2025-03-16 14:04:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 346. [2025-03-16 14:04:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 294 states have (on average 1.1972789115646258) internal successors, (352), 301 states have internal predecessors, (352), 42 states have call successors, (42), 7 states have call predecessors, (42), 9 states have return successors, (43), 40 states have call predecessors, (43), 40 states have call successors, (43) [2025-03-16 14:04:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 437 transitions. [2025-03-16 14:04:05,908 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 437 transitions. Word has length 51 [2025-03-16 14:04:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:05,908 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 437 transitions. [2025-03-16 14:04:05,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 437 transitions. [2025-03-16 14:04:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:04:05,909 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:05,909 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:05,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-16 14:04:06,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2025-03-16 14:04:06,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:06,314 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:06,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1287993063, now seen corresponding path program 1 times [2025-03-16 14:04:06,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:06,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201628039] [2025-03-16 14:04:06,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:06,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:06,318 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-16 14:04:06,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:04:06,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:04:06,360 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:06,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:06,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:06,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:06,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:04:06,505 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201628039] [2025-03-16 14:04:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201628039] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:06,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:06,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-16 14:04:06,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637164260] [2025-03-16 14:04:06,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:06,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 14:04:06,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:06,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 14:04:06,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:06,507 INFO L87 Difference]: Start difference. First operand 346 states and 437 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:04:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:06,598 INFO L93 Difference]: Finished difference Result 406 states and 513 transitions. [2025-03-16 14:04:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-16 14:04:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2025-03-16 14:04:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:06,600 INFO L225 Difference]: With dead ends: 406 [2025-03-16 14:04:06,600 INFO L226 Difference]: Without dead ends: 322 [2025-03-16 14:04:06,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-16 14:04:06,601 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 61 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:06,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 799 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2025-03-16 14:04:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2025-03-16 14:04:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 255 states have (on average 1.196078431372549) internal successors, (305), 260 states have internal predecessors, (305), 36 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (37), 34 states have call predecessors, (37), 34 states have call successors, (37) [2025-03-16 14:04:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 378 transitions. [2025-03-16 14:04:06,612 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 378 transitions. Word has length 52 [2025-03-16 14:04:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:06,612 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 378 transitions. [2025-03-16 14:04:06,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-16 14:04:06,612 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 378 transitions. [2025-03-16 14:04:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:04:06,613 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:06,613 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:06,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-16 14:04:06,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:06,813 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:06,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1302545643, now seen corresponding path program 1 times [2025-03-16 14:04:06,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:06,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829003983] [2025-03-16 14:04:06,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:06,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:06,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:06,815 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:06,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-16 14:04:06,846 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:04:06,856 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:04:06,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:06,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:06,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 14:04:06,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-16 14:04:06,905 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:06,905 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:06,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829003983] [2025-03-16 14:04:06,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829003983] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:06,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:06,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-16 14:04:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333349395] [2025-03-16 14:04:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:06,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:04:06,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:06,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:04:06,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:06,906 INFO L87 Difference]: Start difference. First operand 301 states and 378 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:07,022 INFO L93 Difference]: Finished difference Result 327 states and 405 transitions. [2025-03-16 14:04:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:04:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2025-03-16 14:04:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:07,024 INFO L225 Difference]: With dead ends: 327 [2025-03-16 14:04:07,024 INFO L226 Difference]: Without dead ends: 249 [2025-03-16 14:04:07,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-16 14:04:07,025 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 35 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:07,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 610 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:04:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2025-03-16 14:04:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2025-03-16 14:04:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 200 states have (on average 1.185) internal successors, (237), 205 states have internal predecessors, (237), 26 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2025-03-16 14:04:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 290 transitions. [2025-03-16 14:04:07,034 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 290 transitions. Word has length 52 [2025-03-16 14:04:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:07,034 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 290 transitions. [2025-03-16 14:04:07,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 290 transitions. [2025-03-16 14:04:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 14:04:07,035 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:07,036 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:07,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-16 14:04:07,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:07,237 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:07,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:07,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1586575998, now seen corresponding path program 1 times [2025-03-16 14:04:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:07,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512870416] [2025-03-16 14:04:07,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:07,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:07,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:07,239 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:07,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-16 14:04:07,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:04:07,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:04:07,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:07,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:07,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:04:07,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:15,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:16,124 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512870416] [2025-03-16 14:04:16,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512870416] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:16,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665710560] [2025-03-16 14:04:16,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:16,126 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:16,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2025-03-16 14:04:16,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-16 14:04:16,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 14:04:16,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:16,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:16,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 14:04:16,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:04:16,318 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [665710560] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:16,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:04:16,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2025-03-16 14:04:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608686810] [2025-03-16 14:04:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:16,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 14:04:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:16,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 14:04:16,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=161, Unknown=3, NotChecked=0, Total=210 [2025-03-16 14:04:16,319 INFO L87 Difference]: Start difference. First operand 236 states and 290 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:19,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:22,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:25,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:28,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:32,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.62s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:35,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:36,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:40,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:44,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:46,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:46,671 INFO L93 Difference]: Finished difference Result 246 states and 299 transitions. [2025-03-16 14:04:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:04:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2025-03-16 14:04:46,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:46,672 INFO L225 Difference]: With dead ends: 246 [2025-03-16 14:04:46,672 INFO L226 Difference]: Without dead ends: 244 [2025-03-16 14:04:46,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=53, Invalid=184, Unknown=3, NotChecked=0, Total=240 [2025-03-16 14:04:46,672 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 6 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:46,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 547 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 8 Unknown, 0 Unchecked, 30.3s Time] [2025-03-16 14:04:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-03-16 14:04:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 233. [2025-03-16 14:04:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 200 states have (on average 1.185) internal successors, (237), 202 states have internal predecessors, (237), 23 states have call successors, (23), 7 states have call predecessors, (23), 9 states have return successors, (24), 24 states have call predecessors, (24), 21 states have call successors, (24) [2025-03-16 14:04:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 284 transitions. [2025-03-16 14:04:46,682 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 284 transitions. Word has length 52 [2025-03-16 14:04:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:46,682 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 284 transitions. [2025-03-16 14:04:46,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:04:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 284 transitions. [2025-03-16 14:04:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-16 14:04:46,683 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:46,683 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:46,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2025-03-16 14:04:46,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-03-16 14:04:47,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,084 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:47,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash 127967848, now seen corresponding path program 1 times [2025-03-16 14:04:47,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:47,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495102796] [2025-03-16 14:04:47,084 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:47,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:47,086 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:47,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-03-16 14:04:47,117 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-16 14:04:47,127 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-16 14:04:47,127 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:47,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:47,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:04:47,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:04:47,157 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:47,157 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495102796] [2025-03-16 14:04:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495102796] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:47,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:47,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:04:47,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419124447] [2025-03-16 14:04:47,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:47,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:47,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:47,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:47,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:47,158 INFO L87 Difference]: Start difference. First operand 233 states and 284 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2025-03-16 14:04:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:47,205 INFO L93 Difference]: Finished difference Result 245 states and 296 transitions. [2025-03-16 14:04:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 56 [2025-03-16 14:04:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:47,207 INFO L225 Difference]: With dead ends: 245 [2025-03-16 14:04:47,207 INFO L226 Difference]: Without dead ends: 243 [2025-03-16 14:04:47,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:04:47,207 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 8 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:47,207 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 434 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-03-16 14:04:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2025-03-16 14:04:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 204 states have (on average 1.1813725490196079) internal successors, (241), 207 states have internal predecessors, (241), 24 states have call successors, (24), 8 states have call predecessors, (24), 10 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2025-03-16 14:04:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 290 transitions. [2025-03-16 14:04:47,219 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 290 transitions. Word has length 56 [2025-03-16 14:04:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:47,219 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 290 transitions. [2025-03-16 14:04:47,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2025-03-16 14:04:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 290 transitions. [2025-03-16 14:04:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-16 14:04:47,220 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:47,220 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:47,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:47,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,421 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:47,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1507125112, now seen corresponding path program 1 times [2025-03-16 14:04:47,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:47,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115859311] [2025-03-16 14:04:47,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:47,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:47,424 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:47,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-03-16 14:04:47,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-16 14:04:47,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-16 14:04:47,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:47,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:47,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:04:47,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-16 14:04:47,509 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:47,509 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:47,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115859311] [2025-03-16 14:04:47,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115859311] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:47,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:47,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:04:47,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324215195] [2025-03-16 14:04:47,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:47,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:04:47,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:47,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:04:47,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:04:47,510 INFO L87 Difference]: Start difference. First operand 239 states and 290 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2025-03-16 14:04:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:47,572 INFO L93 Difference]: Finished difference Result 260 states and 311 transitions. [2025-03-16 14:04:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:04:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 56 [2025-03-16 14:04:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:47,573 INFO L225 Difference]: With dead ends: 260 [2025-03-16 14:04:47,573 INFO L226 Difference]: Without dead ends: 258 [2025-03-16 14:04:47,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:04:47,574 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 19 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 509 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 [2025-03-16 14:04:47,574 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 509 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:04:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-03-16 14:04:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 243. [2025-03-16 14:04:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 207 states have (on average 1.178743961352657) internal successors, (244), 210 states have internal predecessors, (244), 24 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2025-03-16 14:04:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 293 transitions. [2025-03-16 14:04:47,582 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 293 transitions. Word has length 56 [2025-03-16 14:04:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:47,582 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 293 transitions. [2025-03-16 14:04:47,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2025-03-16 14:04:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 293 transitions. [2025-03-16 14:04:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:04:47,583 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:47,583 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:47,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2025-03-16 14:04:47,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,784 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:47,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 986033587, now seen corresponding path program 1 times [2025-03-16 14:04:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588137548] [2025-03-16 14:04:47,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:47,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:47,786 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:47,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-03-16 14:04:47,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:04:47,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:04:47,835 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:47,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:47,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 14:04:47,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:04:48,518 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:48,518 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:48,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588137548] [2025-03-16 14:04:48,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588137548] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:48,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:48,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-16 14:04:48,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209662430] [2025-03-16 14:04:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:48,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:04:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:48,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:04:48,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:48,519 INFO L87 Difference]: Start difference. First operand 243 states and 293 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:49,909 INFO L93 Difference]: Finished difference Result 338 states and 416 transitions. [2025-03-16 14:04:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:49,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2025-03-16 14:04:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:49,911 INFO L225 Difference]: With dead ends: 338 [2025-03-16 14:04:49,911 INFO L226 Difference]: Without dead ends: 308 [2025-03-16 14:04:49,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:49,911 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 26 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:49,911 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 767 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-16 14:04:49,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2025-03-16 14:04:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 260. [2025-03-16 14:04:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 221 states have (on average 1.1809954751131222) internal successors, (261), 224 states have internal predecessors, (261), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2025-03-16 14:04:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 316 transitions. [2025-03-16 14:04:49,922 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 316 transitions. Word has length 61 [2025-03-16 14:04:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:49,922 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 316 transitions. [2025-03-16 14:04:49,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 316 transitions. [2025-03-16 14:04:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-16 14:04:49,923 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:49,923 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:49,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-03-16 14:04:50,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:50,123 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:50,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1017053394, now seen corresponding path program 1 times [2025-03-16 14:04:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883147503] [2025-03-16 14:04:50,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:50,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:50,127 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:50,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-03-16 14:04:50,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-16 14:04:50,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-16 14:04:50,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:50,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:50,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 14:04:50,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:50,642 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:04:50,642 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883147503] [2025-03-16 14:04:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883147503] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:04:50,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:04:50,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-16 14:04:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435712615] [2025-03-16 14:04:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:04:50,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 14:04:50,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:50,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 14:04:50,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-03-16 14:04:50,643 INFO L87 Difference]: Start difference. First operand 260 states and 316 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:55,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2025-03-16 14:04:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:55,655 INFO L93 Difference]: Finished difference Result 356 states and 439 transitions. [2025-03-16 14:04:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 14:04:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2025-03-16 14:04:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:55,656 INFO L225 Difference]: With dead ends: 356 [2025-03-16 14:04:55,656 INFO L226 Difference]: Without dead ends: 336 [2025-03-16 14:04:55,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-16 14:04:55,657 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 30 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:55,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 548 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 322 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2025-03-16 14:04:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2025-03-16 14:04:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 255. [2025-03-16 14:04:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 216 states have (on average 1.1805555555555556) internal successors, (255), 219 states have internal predecessors, (255), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2025-03-16 14:04:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 310 transitions. [2025-03-16 14:04:55,670 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 310 transitions. Word has length 61 [2025-03-16 14:04:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:55,670 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 310 transitions. [2025-03-16 14:04:55,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:04:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 310 transitions. [2025-03-16 14:04:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 14:04:55,671 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:55,671 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:55,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-03-16 14:04:55,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:55,872 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:55,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash 193302238, now seen corresponding path program 1 times [2025-03-16 14:04:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567669099] [2025-03-16 14:04:55,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:55,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:55,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:55,874 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:55,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-03-16 14:04:55,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 14:04:55,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:04:55,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:55,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:55,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:04:55,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:04:56,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 14:04:56,196 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567669099] [2025-03-16 14:04:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567669099] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:04:56,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2025-03-16 14:04:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233635156] [2025-03-16 14:04:56,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:56,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:04:56,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:56,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:04:56,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:04:56,198 INFO L87 Difference]: Start difference. First operand 255 states and 310 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-16 14:04:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:04:56,474 INFO L93 Difference]: Finished difference Result 331 states and 400 transitions. [2025-03-16 14:04:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 14:04:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 62 [2025-03-16 14:04:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:04:56,475 INFO L225 Difference]: With dead ends: 331 [2025-03-16 14:04:56,475 INFO L226 Difference]: Without dead ends: 312 [2025-03-16 14:04:56,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:04:56,476 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 43 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 14:04:56,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 660 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 14:04:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2025-03-16 14:04:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 287. [2025-03-16 14:04:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 245 states have (on average 1.1714285714285715) internal successors, (287), 249 states have internal predecessors, (287), 30 states have call successors, (30), 9 states have call predecessors, (30), 11 states have return successors, (31), 30 states have call predecessors, (31), 28 states have call successors, (31) [2025-03-16 14:04:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 348 transitions. [2025-03-16 14:04:56,494 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 348 transitions. Word has length 62 [2025-03-16 14:04:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:04:56,494 INFO L471 AbstractCegarLoop]: Abstraction has 287 states and 348 transitions. [2025-03-16 14:04:56,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-16 14:04:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 348 transitions. [2025-03-16 14:04:56,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 14:04:56,495 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:04:56,495 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:04:56,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-03-16 14:04:56,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:56,695 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:04:56,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:04:56,695 INFO L85 PathProgramCache]: Analyzing trace with hash -939632519, now seen corresponding path program 1 times [2025-03-16 14:04:56,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:04:56,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193570991] [2025-03-16 14:04:56,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:56,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:04:56,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:04:56,697 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:04:56,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-03-16 14:04:56,728 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 14:04:56,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:04:56,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:56,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:56,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-16 14:04:56,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:57,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:57,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:04:57,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193570991] [2025-03-16 14:04:57,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193570991] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:57,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [297810238] [2025-03-16 14:04:57,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:04:57,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:04:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:04:57,853 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:04:57,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2025-03-16 14:04:57,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 14:04:57,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:04:57,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:04:57,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:04:57,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-16 14:04:57,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:04:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-03-16 14:04:59,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:04:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [297810238] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:04:59,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:04:59,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2025-03-16 14:04:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964106685] [2025-03-16 14:04:59,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:04:59,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-16 14:04:59,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:04:59,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-16 14:04:59,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:04:59,153 INFO L87 Difference]: Start difference. First operand 287 states and 348 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-16 14:05:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:00,503 INFO L93 Difference]: Finished difference Result 383 states and 470 transitions. [2025-03-16 14:05:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 14:05:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2025-03-16 14:05:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:00,506 INFO L225 Difference]: With dead ends: 383 [2025-03-16 14:05:00,506 INFO L226 Difference]: Without dead ends: 353 [2025-03-16 14:05:00,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2025-03-16 14:05:00,506 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 45 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:00,507 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 890 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-16 14:05:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2025-03-16 14:05:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 296. [2025-03-16 14:05:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 253 states have (on average 1.1778656126482214) internal successors, (298), 257 states have internal predecessors, (298), 31 states have call successors, (31), 9 states have call predecessors, (31), 11 states have return successors, (32), 31 states have call predecessors, (32), 29 states have call successors, (32) [2025-03-16 14:05:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 361 transitions. [2025-03-16 14:05:00,520 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 361 transitions. Word has length 62 [2025-03-16 14:05:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:00,520 INFO L471 AbstractCegarLoop]: Abstraction has 296 states and 361 transitions. [2025-03-16 14:05:00,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2025-03-16 14:05:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 361 transitions. [2025-03-16 14:05:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 14:05:00,521 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:00,521 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:00,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2025-03-16 14:05:00,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:00,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:00,922 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:00,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash 45874417, now seen corresponding path program 1 times [2025-03-16 14:05:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828837987] [2025-03-16 14:05:00,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:00,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:00,924 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:00,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-03-16 14:05:00,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 14:05:00,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:05:00,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:00,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:00,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 14:05:00,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:05:01,397 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:01,397 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:01,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828837987] [2025-03-16 14:05:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828837987] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:01,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:01,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-16 14:05:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980421440] [2025-03-16 14:05:01,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:01,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-16 14:05:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:01,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-16 14:05:01,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:05:01,398 INFO L87 Difference]: Start difference. First operand 296 states and 361 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:01,887 INFO L93 Difference]: Finished difference Result 333 states and 403 transitions. [2025-03-16 14:05:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 14:05:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2025-03-16 14:05:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:01,888 INFO L225 Difference]: With dead ends: 333 [2025-03-16 14:05:01,888 INFO L226 Difference]: Without dead ends: 316 [2025-03-16 14:05:01,889 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:05:01,889 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 3 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:01,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 543 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 14:05:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2025-03-16 14:05:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 300. [2025-03-16 14:05:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 256 states have (on average 1.171875) internal successors, (300), 260 states have internal predecessors, (300), 32 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (33), 32 states have call predecessors, (33), 30 states have call successors, (33) [2025-03-16 14:05:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 365 transitions. [2025-03-16 14:05:01,905 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 365 transitions. Word has length 62 [2025-03-16 14:05:01,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:01,905 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 365 transitions. [2025-03-16 14:05:01,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 365 transitions. [2025-03-16 14:05:01,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-16 14:05:01,906 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:01,906 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:01,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-03-16 14:05:02,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:02,107 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:02,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 21981498, now seen corresponding path program 1 times [2025-03-16 14:05:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:02,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838915774] [2025-03-16 14:05:02,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:02,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:02,109 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:02,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-03-16 14:05:02,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-16 14:05:02,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-16 14:05:02,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:02,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:02,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 14:05:02,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-16 14:05:02,285 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:02,285 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:02,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838915774] [2025-03-16 14:05:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838915774] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:02,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:02,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-16 14:05:02,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146644950] [2025-03-16 14:05:02,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:02,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 14:05:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:02,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 14:05:02,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:02,286 INFO L87 Difference]: Start difference. First operand 300 states and 365 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:02,766 INFO L93 Difference]: Finished difference Result 358 states and 436 transitions. [2025-03-16 14:05:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 14:05:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2025-03-16 14:05:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:02,768 INFO L225 Difference]: With dead ends: 358 [2025-03-16 14:05:02,768 INFO L226 Difference]: Without dead ends: 328 [2025-03-16 14:05:02,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-03-16 14:05:02,769 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 27 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:02,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 505 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 14:05:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2025-03-16 14:05:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 269. [2025-03-16 14:05:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 230 states have (on average 1.1565217391304348) internal successors, (266), 234 states have internal predecessors, (266), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2025-03-16 14:05:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 321 transitions. [2025-03-16 14:05:02,783 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 321 transitions. Word has length 62 [2025-03-16 14:05:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:02,783 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 321 transitions. [2025-03-16 14:05:02,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 321 transitions. [2025-03-16 14:05:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 14:05:02,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:02,784 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:02,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2025-03-16 14:05:02,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:02,985 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:02,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1642168831, now seen corresponding path program 1 times [2025-03-16 14:05:02,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:02,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501438206] [2025-03-16 14:05:02,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:02,988 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:02,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-03-16 14:05:03,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:03,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:03,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:03,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:03,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:05:03,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:05:03,066 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:03,067 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:03,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501438206] [2025-03-16 14:05:03,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501438206] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:03,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:03,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:05:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132888762] [2025-03-16 14:05:03,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:03,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:05:03,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:03,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:05:03,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:03,067 INFO L87 Difference]: Start difference. First operand 269 states and 321 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:05:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:03,136 INFO L93 Difference]: Finished difference Result 299 states and 353 transitions. [2025-03-16 14:05:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2025-03-16 14:05:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:03,138 INFO L225 Difference]: With dead ends: 299 [2025-03-16 14:05:03,138 INFO L226 Difference]: Without dead ends: 286 [2025-03-16 14:05:03,139 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:03,139 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 14 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:03,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 475 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2025-03-16 14:05:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 238. [2025-03-16 14:05:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 200 states have (on average 1.165) internal successors, (233), 207 states have internal predecessors, (233), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2025-03-16 14:05:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 286 transitions. [2025-03-16 14:05:03,153 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 286 transitions. Word has length 64 [2025-03-16 14:05:03,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:03,153 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 286 transitions. [2025-03-16 14:05:03,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:05:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 286 transitions. [2025-03-16 14:05:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-16 14:05:03,154 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:03,154 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:03,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-03-16 14:05:03,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:03,354 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:03,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 672509120, now seen corresponding path program 1 times [2025-03-16 14:05:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:03,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062104987] [2025-03-16 14:05:03,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:03,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:03,356 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:03,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-03-16 14:05:03,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-16 14:05:03,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-16 14:05:03,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:03,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:03,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 14:05:03,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-16 14:05:03,440 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:03,441 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:03,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062104987] [2025-03-16 14:05:03,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062104987] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:03,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:03,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 14:05:03,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369180607] [2025-03-16 14:05:03,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:03,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 14:05:03,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:03,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 14:05:03,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-16 14:05:03,441 INFO L87 Difference]: Start difference. First operand 238 states and 286 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:05:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:03,508 INFO L93 Difference]: Finished difference Result 264 states and 313 transitions. [2025-03-16 14:05:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2025-03-16 14:05:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:03,510 INFO L225 Difference]: With dead ends: 264 [2025-03-16 14:05:03,510 INFO L226 Difference]: Without dead ends: 191 [2025-03-16 14:05:03,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-16 14:05:03,510 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 14 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:03,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 468 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-03-16 14:05:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 165. [2025-03-16 14:05:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 143 states have internal predecessors, (163), 19 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2025-03-16 14:05:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2025-03-16 14:05:03,521 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 64 [2025-03-16 14:05:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:03,521 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2025-03-16 14:05:03,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-16 14:05:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2025-03-16 14:05:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-16 14:05:03,521 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:03,522 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:03,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-03-16 14:05:03,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:03,722 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:03,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:03,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1390697602, now seen corresponding path program 1 times [2025-03-16 14:05:03,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084689681] [2025-03-16 14:05:03,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:03,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:03,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:03,724 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:03,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-03-16 14:05:03,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-03-16 14:05:03,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 14:05:03,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:03,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:03,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:05:03,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-16 14:05:03,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:05:03,980 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:03,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084689681] [2025-03-16 14:05:03,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084689681] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 14:05:03,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 14:05:03,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2025-03-16 14:05:03,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448619855] [2025-03-16 14:05:03,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 14:05:03,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 14:05:03,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:03,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 14:05:03,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-16 14:05:03,981 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:04,161 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2025-03-16 14:05:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 14:05:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 63 [2025-03-16 14:05:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:04,162 INFO L225 Difference]: With dead ends: 194 [2025-03-16 14:05:04,162 INFO L226 Difference]: Without dead ends: 143 [2025-03-16 14:05:04,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-16 14:05:04,162 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 9 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:04,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 584 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-03-16 14:05:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2025-03-16 14:05:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 123 states have internal predecessors, (138), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-16 14:05:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2025-03-16 14:05:04,172 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 63 [2025-03-16 14:05:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:04,173 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2025-03-16 14:05:04,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-16 14:05:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2025-03-16 14:05:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 14:05:04,173 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:04,173 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:04,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-03-16 14:05:04,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:04,373 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:04,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash -887162068, now seen corresponding path program 1 times [2025-03-16 14:05:04,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:04,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63528539] [2025-03-16 14:05:04,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:04,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:04,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:04,376 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:04,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-03-16 14:05:04,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 14:05:04,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:05:04,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:04,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:04,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-16 14:05:04,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-16 14:05:04,469 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:04,470 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63528539] [2025-03-16 14:05:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63528539] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:04,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 14:05:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 14:05:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270956629] [2025-03-16 14:05:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:04,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 14:05:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:04,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 14:05:04,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:05:04,470 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:04,492 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2025-03-16 14:05:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 14:05:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2025-03-16 14:05:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:04,492 INFO L225 Difference]: With dead ends: 171 [2025-03-16 14:05:04,492 INFO L226 Difference]: Without dead ends: 123 [2025-03-16 14:05:04,493 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 14:05:04,493 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 14 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:04,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 225 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 14:05:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-16 14:05:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2025-03-16 14:05:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.134020618556701) internal successors, (110), 99 states have internal predecessors, (110), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 14:05:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2025-03-16 14:05:04,501 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 65 [2025-03-16 14:05:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:04,501 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2025-03-16 14:05:04,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 14:05:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2025-03-16 14:05:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 14:05:04,501 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:04,501 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:04,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-03-16 14:05:04,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:04,702 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 14:05:04,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 14:05:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1224128301, now seen corresponding path program 1 times [2025-03-16 14:05:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-16 14:05:04,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43628341] [2025-03-16 14:05:04,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:04,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 14:05:04,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 14:05:04,704 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 14:05:04,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-03-16 14:05:04,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 14:05:04,747 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:05:04,747 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:04,747 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:04,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-16 14:05:04,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-16 14:05:04,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 14:05:05,095 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-16 14:05:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43628341] [2025-03-16 14:05:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43628341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 14:05:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959803600] [2025-03-16 14:05:05,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 14:05:05,096 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-16 14:05:05,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-16 14:05:05,098 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-16 14:05:05,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2025-03-16 14:05:05,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-16 14:05:05,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-16 14:05:05,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 14:05:05,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 14:05:05,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 14:05:05,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 14:05:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-16 14:05:05,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 14:05:05,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [959803600] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 14:05:05,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 14:05:05,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-16 14:05:05,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753437533] [2025-03-16 14:05:05,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 14:05:05,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 14:05:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-16 14:05:05,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 14:05:05,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2025-03-16 14:05:05,271 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 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) [2025-03-16 14:05:05,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 14:05:05,390 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2025-03-16 14:05:05,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 14:05:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 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 65 [2025-03-16 14:05:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 14:05:05,391 INFO L225 Difference]: With dead ends: 161 [2025-03-16 14:05:05,391 INFO L226 Difference]: Without dead ends: 115 [2025-03-16 14:05:05,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2025-03-16 14:05:05,392 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 19 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 14:05:05,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 292 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 14:05:05,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-16 14:05:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2025-03-16 14:05:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 99 states have internal predecessors, (109), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 14:05:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2025-03-16 14:05:05,398 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 65 [2025-03-16 14:05:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 14:05:05,398 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2025-03-16 14:05:05,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 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) [2025-03-16 14:05:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2025-03-16 14:05:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-16 14:05:05,398 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 14:05:05,398 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 14:05:05,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-03-16 14:05:05,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0