./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac7d6bbeae1af74610eb5ea0ec9cc56676532539c7535ebfdf72e0c17174815d --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:52:59,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:52:59,754 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:52:59,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:52:59,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:52:59,780 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:52:59,780 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:52:59,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:52:59,781 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:52:59,781 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:52:59,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:52:59,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:52:59,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:52:59,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:52:59,782 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:52:59,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:52:59,783 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:52:59,784 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:52:59,784 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:52:59,784 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:52:59,784 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:52:59,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:52:59,784 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:52:59,784 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:52:59,784 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:52:59,785 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:52:59,785 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 -> ac7d6bbeae1af74610eb5ea0ec9cc56676532539c7535ebfdf72e0c17174815d [2025-03-03 13:53:00,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:53:00,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:53:00,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:53:00,036 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:53:00,036 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:53:00,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2025-03-03 13:53:01,149 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27323e36b/df7b432195ec4a2d8646174937886e48/FLAG56a11510b [2025-03-03 13:53:01,362 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:53:01,362 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c [2025-03-03 13:53:01,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27323e36b/df7b432195ec4a2d8646174937886e48/FLAG56a11510b [2025-03-03 13:53:01,718 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27323e36b/df7b432195ec4a2d8646174937886e48 [2025-03-03 13:53:01,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:53:01,721 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:53:01,723 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:53:01,723 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:53:01,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:53:01,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18185998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01, skipping insertion in model container [2025-03-03 13:53:01,729 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,738 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:53:01,825 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c[535,548] [2025-03-03 13:53:01,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:53:01,853 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:53:01,860 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound100.c[535,548] [2025-03-03 13:53:01,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:53:01,882 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:53:01,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01 WrapperNode [2025-03-03 13:53:01,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:53:01,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:53:01,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:53:01,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:53:01,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,908 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2025-03-03 13:53:01,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:53:01,909 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:53:01,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:53:01,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:53:01,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,916 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,927 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 13:53:01,930 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,932 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,933 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:53:01,935 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:53:01,935 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:53:01,936 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:53:01,937 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (1/1) ... [2025-03-03 13:53:01,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:53:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:01,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:53:01,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:53:01,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:53:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-03 13:53:01,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-03 13:53:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:53:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:53:01,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:53:01,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 13:53:01,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 13:53:02,021 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:53:02,023 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:53:02,126 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-03 13:53:02,126 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:53:02,132 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:53:02,134 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:53:02,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:53:02 BoogieIcfgContainer [2025-03-03 13:53:02,134 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:53:02,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:53:02,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:53:02,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:53:02,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:53:01" (1/3) ... [2025-03-03 13:53:02,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67053573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:53:02, skipping insertion in model container [2025-03-03 13:53:02,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:53:01" (2/3) ... [2025-03-03 13:53:02,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67053573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:53:02, skipping insertion in model container [2025-03-03 13:53:02,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:53:02" (3/3) ... [2025-03-03 13:53:02,143 INFO L128 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound100.c [2025-03-03 13:53:02,154 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:53:02,156 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fermat1-ll_unwindbound100.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-03 13:53:02,198 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:53:02,209 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;@a85f450, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:53:02,211 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:53:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:53:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-03 13:53:02,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:02,219 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:02,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:02,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash -758256744, now seen corresponding path program 1 times [2025-03-03 13:53:02,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:02,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197200265] [2025-03-03 13:53:02,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:02,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:02,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:53:02,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:53:02,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:02,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:53:02,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197200265] [2025-03-03 13:53:02,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197200265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:02,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607435751] [2025-03-03 13:53:02,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:02,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:02,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:02,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:53:02,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-03 13:53:02,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-03 13:53:02,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:02,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:02,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-03 13:53:02,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 13:53:02,411 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:53:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607435751] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:53:02,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 13:53:02,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-03 13:53:02,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001869633] [2025-03-03 13:53:02,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:53:02,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 13:53:02,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:02,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 13:53:02,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:53:02,431 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:53:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:02,446 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2025-03-03 13:53:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 13:53:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-03 13:53:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:02,452 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:53:02,453 INFO L226 Difference]: Without dead ends: 28 [2025-03-03 13:53:02,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 13:53:02,458 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:02,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:53:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-03-03 13:53:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-03-03 13:53:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 13:53:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-03-03 13:53:02,488 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2025-03-03 13:53:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:02,488 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-03-03 13:53:02,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-03 13:53:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-03-03 13:53:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 13:53:02,490 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:02,490 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:02,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:02,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-03 13:53:02,694 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:02,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -766943530, now seen corresponding path program 1 times [2025-03-03 13:53:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711786772] [2025-03-03 13:53:02,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:02,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 13:53:02,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 13:53:02,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:02,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 13:53:02,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862830757] [2025-03-03 13:53:02,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:02,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:02,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:53:02,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 13:53:02,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 13:53:02,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:02,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:02,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:53:02,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:02,958 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 13:53:02,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:02,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711786772] [2025-03-03 13:53:02,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 13:53:02,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862830757] [2025-03-03 13:53:02,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862830757] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:53:02,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:53:02,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:53:02,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279464482] [2025-03-03 13:53:02,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:53:02,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:53:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:02,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:53:02,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:53:02,960 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:53:04,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:53:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:04,664 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2025-03-03 13:53:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:53:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-03-03 13:53:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:04,666 INFO L225 Difference]: With dead ends: 47 [2025-03-03 13:53:04,666 INFO L226 Difference]: Without dead ends: 45 [2025-03-03 13:53:04,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:53:04,666 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:04,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-03 13:53:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-03 13:53:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2025-03-03 13:53:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:53:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2025-03-03 13:53:04,676 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 19 [2025-03-03 13:53:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:04,676 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2025-03-03 13:53:04,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:53:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2025-03-03 13:53:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-03 13:53:04,676 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:04,677 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:04,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:04,877 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,SelfDestructingSolverStorable1 [2025-03-03 13:53:04,877 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:04,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:04,878 INFO L85 PathProgramCache]: Analyzing trace with hash -766198755, now seen corresponding path program 1 times [2025-03-03 13:53:04,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:04,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619596523] [2025-03-03 13:53:04,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:04,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:04,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-03 13:53:04,888 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-03 13:53:04,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:04,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:04,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:04,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619596523] [2025-03-03 13:53:04,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619596523] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:53:04,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:53:04,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 13:53:04,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666192757] [2025-03-03 13:53:04,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:53:04,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:53:04,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:04,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:53:04,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:53:04,953 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:53:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:04,975 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2025-03-03 13:53:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:53:04,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-03-03 13:53:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:04,977 INFO L225 Difference]: With dead ends: 53 [2025-03-03 13:53:04,977 INFO L226 Difference]: Without dead ends: 46 [2025-03-03 13:53:04,977 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 [2025-03-03 13:53:04,978 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:04,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:53:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-03-03 13:53:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-03-03 13:53:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 13:53:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2025-03-03 13:53:04,992 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2025-03-03 13:53:04,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:04,992 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2025-03-03 13:53:04,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-03 13:53:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2025-03-03 13:53:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-03 13:53:04,993 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:04,993 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:04,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 13:53:04,993 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:04,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1891524392, now seen corresponding path program 1 times [2025-03-03 13:53:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048522366] [2025-03-03 13:53:04,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:05,001 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 13:53:05,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:53:05,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:05,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:05,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048522366] [2025-03-03 13:53:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048522366] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097050405] [2025-03-03 13:53:05,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:05,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:05,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:53:05,246 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-03 13:53:05,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-03 13:53:05,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:05,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:05,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 13:53:05,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:05,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:05,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097050405] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:05,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:05,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2025-03-03 13:53:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581900342] [2025-03-03 13:53:05,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:05,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:53:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:05,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:53:05,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:53:05,406 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-03 13:53:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:05,492 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2025-03-03 13:53:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 13:53:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2025-03-03 13:53:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:05,494 INFO L225 Difference]: With dead ends: 53 [2025-03-03 13:53:05,494 INFO L226 Difference]: Without dead ends: 48 [2025-03-03 13:53:05,495 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-03 13:53:05,495 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:05,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 133 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:53:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-03 13:53:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2025-03-03 13:53:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 13:53:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2025-03-03 13:53:05,507 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2025-03-03 13:53:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:05,507 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2025-03-03 13:53:05,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-03 13:53:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2025-03-03 13:53:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-03 13:53:05,509 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:05,509 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:05,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:05,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:05,710 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:05,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2058223402, now seen corresponding path program 1 times [2025-03-03 13:53:05,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:05,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526058314] [2025-03-03 13:53:05,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:05,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:05,716 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-03 13:53:05,726 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-03 13:53:05,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:05,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:05,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:05,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526058314] [2025-03-03 13:53:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526058314] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:53:05,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:53:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 13:53:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906689065] [2025-03-03 13:53:05,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:53:05,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 13:53:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:05,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 13:53:05,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:53:05,793 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 13:53:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:05,826 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2025-03-03 13:53:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 13:53:05,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2025-03-03 13:53:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:05,827 INFO L225 Difference]: With dead ends: 61 [2025-03-03 13:53:05,828 INFO L226 Difference]: Without dead ends: 40 [2025-03-03 13:53:05,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-03 13:53:05,829 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:05,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:53:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-03-03 13:53:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-03-03 13:53:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-03 13:53:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-03-03 13:53:05,839 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2025-03-03 13:53:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:05,840 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-03-03 13:53:05,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-03 13:53:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-03-03 13:53:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 13:53:05,840 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:05,840 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-03-03 13:53:05,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-03 13:53:05,840 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:05,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1717573043, now seen corresponding path program 1 times [2025-03-03 13:53:05,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:05,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12191414] [2025-03-03 13:53:05,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:05,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:05,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 13:53:05,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 13:53:05,857 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:05,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 13:53:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12191414] [2025-03-03 13:53:05,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12191414] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:53:05,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:53:05,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 13:53:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121463183] [2025-03-03 13:53:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:53:05,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 13:53:05,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:05,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 13:53:05,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:53:05,931 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-03 13:53:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:05,973 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2025-03-03 13:53:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:53:05,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2025-03-03 13:53:05,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:05,974 INFO L225 Difference]: With dead ends: 70 [2025-03-03 13:53:05,974 INFO L226 Difference]: Without dead ends: 49 [2025-03-03 13:53:05,975 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-03 13:53:05,975 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:05,975 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:53:05,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-03 13:53:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-03-03 13:53:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-03 13:53:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2025-03-03 13:53:05,985 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2025-03-03 13:53:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:05,985 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2025-03-03 13:53:05,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-03 13:53:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2025-03-03 13:53:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-03 13:53:05,987 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:05,987 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:05,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-03 13:53:05,988 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:05,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1141283122, now seen corresponding path program 1 times [2025-03-03 13:53:05,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:05,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226228556] [2025-03-03 13:53:05,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:05,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:05,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:53:06,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:53:06,002 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:06,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 13:53:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226228556] [2025-03-03 13:53:06,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226228556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816912304] [2025-03-03 13:53:06,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:06,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:06,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:06,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:06,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:53:06,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-03 13:53:06,095 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-03 13:53:06,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:06,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:06,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 13:53:06,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:06,140 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-03 13:53:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816912304] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:06,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:06,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-03-03 13:53:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420455584] [2025-03-03 13:53:06,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:06,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 13:53:06,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:06,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 13:53:06,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-03 13:53:06,199 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-03 13:53:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:06,327 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2025-03-03 13:53:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:53:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 39 [2025-03-03 13:53:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:06,329 INFO L225 Difference]: With dead ends: 125 [2025-03-03 13:53:06,329 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 13:53:06,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:53:06,330 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:06,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 141 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:53:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 13:53:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2025-03-03 13:53:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2025-03-03 13:53:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2025-03-03 13:53:06,359 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2025-03-03 13:53:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:06,360 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2025-03-03 13:53:06,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2025-03-03 13:53:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2025-03-03 13:53:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 13:53:06,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:06,362 INFO L218 NwaCegarLoop]: trace histogram [4, 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] [2025-03-03 13:53:06,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:06,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:06,563 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:06,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 318935871, now seen corresponding path program 1 times [2025-03-03 13:53:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:06,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758000255] [2025-03-03 13:53:06,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:06,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:06,569 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 13:53:06,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 13:53:06,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:06,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:53:06,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:06,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758000255] [2025-03-03 13:53:06,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758000255] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:53:06,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:53:06,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 13:53:06,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900882945] [2025-03-03 13:53:06,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:53:06,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:53:06,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:06,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:53:06,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:53:06,618 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2025-03-03 13:53:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:06,669 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2025-03-03 13:53:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:53:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 43 [2025-03-03 13:53:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:06,671 INFO L225 Difference]: With dead ends: 154 [2025-03-03 13:53:06,671 INFO L226 Difference]: Without dead ends: 115 [2025-03-03 13:53:06,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:53:06,672 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:06,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 86 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:53:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-03 13:53:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2025-03-03 13:53:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2025-03-03 13:53:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2025-03-03 13:53:06,700 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2025-03-03 13:53:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:06,701 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2025-03-03 13:53:06,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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) [2025-03-03 13:53:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2025-03-03 13:53:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-03 13:53:06,703 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:06,703 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:06,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-03 13:53:06,703 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:06,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash 191952453, now seen corresponding path program 1 times [2025-03-03 13:53:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:06,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149485633] [2025-03-03 13:53:06,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:06,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:06,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:53:06,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:53:06,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:06,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:53:06,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149485633] [2025-03-03 13:53:06,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149485633] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008873610] [2025-03-03 13:53:06,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:06,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:06,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:06,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:06,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:53:06,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-03 13:53:06,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-03 13:53:06,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:06,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:06,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:53:06,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:06,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 13:53:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008873610] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:06,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:06,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-03-03 13:53:06,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938998115] [2025-03-03 13:53:06,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:06,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 13:53:06,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:06,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 13:53:06,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-03-03 13:53:06,980 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-03-03 13:53:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:07,141 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2025-03-03 13:53:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 13:53:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 45 [2025-03-03 13:53:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:07,143 INFO L225 Difference]: With dead ends: 215 [2025-03-03 13:53:07,143 INFO L226 Difference]: Without dead ends: 168 [2025-03-03 13:53:07,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:53:07,144 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 74 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:07,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:53:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-03-03 13:53:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2025-03-03 13:53:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-03 13:53:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2025-03-03 13:53:07,186 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2025-03-03 13:53:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:07,186 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2025-03-03 13:53:07,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-03-03 13:53:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2025-03-03 13:53:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 13:53:07,187 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:07,187 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2025-03-03 13:53:07,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:07,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:07,392 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:07,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1202242871, now seen corresponding path program 1 times [2025-03-03 13:53:07,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:07,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980135884] [2025-03-03 13:53:07,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:07,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:07,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 13:53:07,404 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 13:53:07,404 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:07,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 13:53:07,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980135884] [2025-03-03 13:53:07,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980135884] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:07,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707353140] [2025-03-03 13:53:07,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:07,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:07,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:07,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:07,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:53:07,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 13:53:07,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 13:53:07,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:07,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:07,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-03 13:53:07,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:07,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-03 13:53:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707353140] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:07,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-03-03 13:53:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946627601] [2025-03-03 13:53:07,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:07,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:53:07,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:07,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:53:07,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:53:07,724 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2025-03-03 13:53:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:07,949 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2025-03-03 13:53:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 13:53:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 51 [2025-03-03 13:53:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:07,951 INFO L225 Difference]: With dead ends: 207 [2025-03-03 13:53:07,951 INFO L226 Difference]: Without dead ends: 202 [2025-03-03 13:53:07,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2025-03-03 13:53:07,951 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 143 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:07,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 171 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:53:07,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-03-03 13:53:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2025-03-03 13:53:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2025-03-03 13:53:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2025-03-03 13:53:07,994 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2025-03-03 13:53:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:07,994 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2025-03-03 13:53:07,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2025-03-03 13:53:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2025-03-03 13:53:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-03-03 13:53:07,996 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:07,997 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:08,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:53:08,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:08,198 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:08,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash -760810850, now seen corresponding path program 2 times [2025-03-03 13:53:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:08,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129912106] [2025-03-03 13:53:08,198 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:08,205 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-03 13:53:08,219 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-03 13:53:08,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:08,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 13:53:08,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129912106] [2025-03-03 13:53:08,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129912106] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137737587] [2025-03-03 13:53:08,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:08,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:08,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:08,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:08,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:53:08,448 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 87 statements into 2 equivalence classes. [2025-03-03 13:53:08,470 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 87 of 87 statements. [2025-03-03 13:53:08,470 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:08,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:08,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-03 13:53:08,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 18 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:08,575 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 13:53:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137737587] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:08,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2025-03-03 13:53:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120032283] [2025-03-03 13:53:08,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:08,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 13:53:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:08,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 13:53:08,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2025-03-03 13:53:08,773 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 13:53:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:09,322 INFO L93 Difference]: Finished difference Result 549 states and 749 transitions. [2025-03-03 13:53:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-03 13:53:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) Word has length 87 [2025-03-03 13:53:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:09,325 INFO L225 Difference]: With dead ends: 549 [2025-03-03 13:53:09,325 INFO L226 Difference]: Without dead ends: 491 [2025-03-03 13:53:09,326 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=507, Invalid=899, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 13:53:09,326 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 364 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:09,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 318 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:53:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2025-03-03 13:53:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 449. [2025-03-03 13:53:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 336 states have (on average 1.2470238095238095) internal successors, (419), 339 states have internal predecessors, (419), 93 states have call successors, (93), 20 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2025-03-03 13:53:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 604 transitions. [2025-03-03 13:53:09,435 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 604 transitions. Word has length 87 [2025-03-03 13:53:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:09,435 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 604 transitions. [2025-03-03 13:53:09,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 13:53:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 604 transitions. [2025-03-03 13:53:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-03 13:53:09,436 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:09,436 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:09,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 13:53:09,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:09,637 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:09,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1449499115, now seen corresponding path program 2 times [2025-03-03 13:53:09,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:09,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073449202] [2025-03-03 13:53:09,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:09,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:09,644 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-03-03 13:53:09,654 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-03 13:53:09,654 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:09,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 20 proven. 112 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-03 13:53:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073449202] [2025-03-03 13:53:09,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073449202] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102333986] [2025-03-03 13:53:09,932 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:09,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:09,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:09,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 13:53:09,966 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-03-03 13:53:09,993 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-03-03 13:53:09,993 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:09,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:09,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 13:53:09,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 20 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:10,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 20 proven. 112 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-03 13:53:10,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102333986] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:10,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2025-03-03 13:53:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323151496] [2025-03-03 13:53:10,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:10,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 13:53:10,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:10,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 13:53:10,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-03-03 13:53:10,340 INFO L87 Difference]: Start difference. First operand 449 states and 604 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2025-03-03 13:53:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:10,919 INFO L93 Difference]: Finished difference Result 746 states and 991 transitions. [2025-03-03 13:53:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-03 13:53:10,919 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 93 [2025-03-03 13:53:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:10,922 INFO L225 Difference]: With dead ends: 746 [2025-03-03 13:53:10,922 INFO L226 Difference]: Without dead ends: 486 [2025-03-03 13:53:10,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 13:53:10,926 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 456 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:10,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 337 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:53:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2025-03-03 13:53:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 437. [2025-03-03 13:53:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 327 states have (on average 1.2110091743119267) internal successors, (396), 328 states have internal predecessors, (396), 88 states have call successors, (88), 22 states have call predecessors, (88), 21 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2025-03-03 13:53:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 571 transitions. [2025-03-03 13:53:10,984 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 571 transitions. Word has length 93 [2025-03-03 13:53:10,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:10,984 INFO L471 AbstractCegarLoop]: Abstraction has 437 states and 571 transitions. [2025-03-03 13:53:10,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2025-03-03 13:53:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 571 transitions. [2025-03-03 13:53:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-03-03 13:53:10,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:10,985 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:10,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 13:53:11,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 13:53:11,190 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:11,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1311565561, now seen corresponding path program 2 times [2025-03-03 13:53:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003006376] [2025-03-03 13:53:11,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:11,195 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 99 statements into 2 equivalence classes. [2025-03-03 13:53:11,203 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 99 of 99 statements. [2025-03-03 13:53:11,203 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:11,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-03-03 13:53:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003006376] [2025-03-03 13:53:11,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003006376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:11,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274432791] [2025-03-03 13:53:11,425 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:53:11,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:11,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:11,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:11,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 13:53:11,455 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 99 statements into 2 equivalence classes. [2025-03-03 13:53:11,478 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 99 of 99 statements. [2025-03-03 13:53:11,478 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:53:11,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:11,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-03 13:53:11,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 20 proven. 294 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:11,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-03-03 13:53:11,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274432791] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:11,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:11,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2025-03-03 13:53:11,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449234450] [2025-03-03 13:53:11,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:11,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 13:53:11,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:11,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 13:53:11,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2025-03-03 13:53:11,823 INFO L87 Difference]: Start difference. First operand 437 states and 571 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-03 13:53:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:12,435 INFO L93 Difference]: Finished difference Result 495 states and 652 transitions. [2025-03-03 13:53:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-03 13:53:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) Word has length 99 [2025-03-03 13:53:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:12,438 INFO L225 Difference]: With dead ends: 495 [2025-03-03 13:53:12,439 INFO L226 Difference]: Without dead ends: 490 [2025-03-03 13:53:12,439 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 13:53:12,440 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 415 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:12,441 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 339 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:53:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2025-03-03 13:53:12,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 482. [2025-03-03 13:53:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 360 states have (on average 1.1944444444444444) internal successors, (430), 364 states have internal predecessors, (430), 98 states have call successors, (98), 24 states have call predecessors, (98), 23 states have return successors, (97), 93 states have call predecessors, (97), 97 states have call successors, (97) [2025-03-03 13:53:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 625 transitions. [2025-03-03 13:53:12,511 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 625 transitions. Word has length 99 [2025-03-03 13:53:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:12,511 INFO L471 AbstractCegarLoop]: Abstraction has 482 states and 625 transitions. [2025-03-03 13:53:12,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2025-03-03 13:53:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 625 transitions. [2025-03-03 13:53:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-03-03 13:53:12,514 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:12,514 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 19, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:12,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:12,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 13:53:12,715 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:12,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -897357250, now seen corresponding path program 3 times [2025-03-03 13:53:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:12,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328303696] [2025-03-03 13:53:12,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:12,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:12,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 183 statements into 21 equivalence classes. [2025-03-03 13:53:12,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 183 of 183 statements. [2025-03-03 13:53:12,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-03 13:53:12,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 42 proven. 722 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2025-03-03 13:53:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:13,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328303696] [2025-03-03 13:53:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328303696] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:13,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261457353] [2025-03-03 13:53:13,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:13,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:13,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 13:53:13,473 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 183 statements into 21 equivalence classes. [2025-03-03 13:53:13,807 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 183 of 183 statements. [2025-03-03 13:53:13,808 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-03 13:53:13,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:13,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-03 13:53:13,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 42 proven. 1482 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:13,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 42 proven. 722 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2025-03-03 13:53:14,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261457353] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:14,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:14,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 46 [2025-03-03 13:53:14,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666453615] [2025-03-03 13:53:14,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:14,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-03 13:53:14,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:14,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-03 13:53:14,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2025-03-03 13:53:14,543 INFO L87 Difference]: Start difference. First operand 482 states and 625 transitions. Second operand has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (67), 23 states have call predecessors, (67), 22 states have return successors, (66), 42 states have call predecessors, (66), 42 states have call successors, (66) [2025-03-03 13:53:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:16,080 INFO L93 Difference]: Finished difference Result 1281 states and 1745 transitions. [2025-03-03 13:53:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-03-03 13:53:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (67), 23 states have call predecessors, (67), 22 states have return successors, (66), 42 states have call predecessors, (66), 42 states have call successors, (66) Word has length 183 [2025-03-03 13:53:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:16,085 INFO L225 Difference]: With dead ends: 1281 [2025-03-03 13:53:16,086 INFO L226 Difference]: Without dead ends: 1223 [2025-03-03 13:53:16,087 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2025-03-03 13:53:16,088 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 1042 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:16,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 628 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:53:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2025-03-03 13:53:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1121. [2025-03-03 13:53:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 840 states have (on average 1.2416666666666667) internal successors, (1043), 843 states have internal predecessors, (1043), 237 states have call successors, (237), 44 states have call predecessors, (237), 43 states have return successors, (236), 233 states have call predecessors, (236), 236 states have call successors, (236) [2025-03-03 13:53:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1516 transitions. [2025-03-03 13:53:16,221 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1516 transitions. Word has length 183 [2025-03-03 13:53:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:16,221 INFO L471 AbstractCegarLoop]: Abstraction has 1121 states and 1516 transitions. [2025-03-03 13:53:16,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.478260869565218) internal successors, (206), 46 states have internal predecessors, (206), 43 states have call successors, (67), 23 states have call predecessors, (67), 22 states have return successors, (66), 42 states have call predecessors, (66), 42 states have call successors, (66) [2025-03-03 13:53:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1516 transitions. [2025-03-03 13:53:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2025-03-03 13:53:16,227 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:16,227 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 20, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:16,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:16,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 13:53:16,428 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:16,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1642505653, now seen corresponding path program 3 times [2025-03-03 13:53:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:16,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112991499] [2025-03-03 13:53:16,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:16,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:16,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 189 statements into 22 equivalence classes. [2025-03-03 13:53:16,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 189 of 189 statements. [2025-03-03 13:53:16,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-03-03 13:53:16,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 44 proven. 760 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2025-03-03 13:53:17,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112991499] [2025-03-03 13:53:17,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112991499] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595692407] [2025-03-03 13:53:17,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:17,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:17,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:17,155 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:17,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 13:53:17,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 189 statements into 22 equivalence classes. [2025-03-03 13:53:17,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 189 of 189 statements. [2025-03-03 13:53:17,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-03-03 13:53:17,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:17,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-03 13:53:17,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 44 proven. 1600 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:17,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 44 proven. 760 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2025-03-03 13:53:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595692407] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:18,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:18,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 25] total 49 [2025-03-03 13:53:18,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671323923] [2025-03-03 13:53:18,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:18,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 13:53:18,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:18,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 13:53:18,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1065, Invalid=1287, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:53:18,255 INFO L87 Difference]: Start difference. First operand 1121 states and 1516 transitions. Second operand has 49 states, 49 states have (on average 4.387755102040816) internal successors, (215), 49 states have internal predecessors, (215), 45 states have call successors, (70), 24 states have call predecessors, (70), 23 states have return successors, (69), 44 states have call predecessors, (69), 44 states have call successors, (69) [2025-03-03 13:53:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:20,124 INFO L93 Difference]: Finished difference Result 1766 states and 2359 transitions. [2025-03-03 13:53:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2025-03-03 13:53:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.387755102040816) internal successors, (215), 49 states have internal predecessors, (215), 45 states have call successors, (70), 24 states have call predecessors, (70), 23 states have return successors, (69), 44 states have call predecessors, (69), 44 states have call successors, (69) Word has length 189 [2025-03-03 13:53:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:20,129 INFO L225 Difference]: With dead ends: 1766 [2025-03-03 13:53:20,129 INFO L226 Difference]: Without dead ends: 1122 [2025-03-03 13:53:20,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3744, Invalid=8028, Unknown=0, NotChecked=0, Total=11772 [2025-03-03 13:53:20,133 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 1325 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:20,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1325 Valid, 569 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-03 13:53:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2025-03-03 13:53:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1013. [2025-03-03 13:53:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 759 states have (on average 1.2015810276679841) internal successors, (912), 760 states have internal predecessors, (912), 208 states have call successors, (208), 46 states have call predecessors, (208), 45 states have return successors, (207), 206 states have call predecessors, (207), 207 states have call successors, (207) [2025-03-03 13:53:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1327 transitions. [2025-03-03 13:53:20,251 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1327 transitions. Word has length 189 [2025-03-03 13:53:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:20,251 INFO L471 AbstractCegarLoop]: Abstraction has 1013 states and 1327 transitions. [2025-03-03 13:53:20,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.387755102040816) internal successors, (215), 49 states have internal predecessors, (215), 45 states have call successors, (70), 24 states have call predecessors, (70), 23 states have return successors, (69), 44 states have call predecessors, (69), 44 states have call successors, (69) [2025-03-03 13:53:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1327 transitions. [2025-03-03 13:53:20,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2025-03-03 13:53:20,254 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:20,254 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 20, 20, 20, 20, 19, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:20,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:20,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 13:53:20,458 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:20,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1181146969, now seen corresponding path program 3 times [2025-03-03 13:53:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:20,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189300520] [2025-03-03 13:53:20,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:20,467 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 195 statements into 23 equivalence classes. [2025-03-03 13:53:20,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 35 of 195 statements. [2025-03-03 13:53:20,472 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:53:20,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 108 proven. 1 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2025-03-03 13:53:20,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:20,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189300520] [2025-03-03 13:53:20,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189300520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:20,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743483043] [2025-03-03 13:53:20,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:53:20,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:20,556 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:20,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 13:53:20,593 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 195 statements into 23 equivalence classes. [2025-03-03 13:53:20,612 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 35 of 195 statements. [2025-03-03 13:53:20,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 13:53:20,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:20,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 13:53:20,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1622 trivial. 0 not checked. [2025-03-03 13:53:32,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:36,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743483043] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:36,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 13:53:36,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 16 [2025-03-03 13:53:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112929095] [2025-03-03 13:53:36,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:36,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 13:53:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:36,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 13:53:36,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=253, Unknown=1, NotChecked=0, Total=306 [2025-03-03 13:53:36,465 INFO L87 Difference]: Start difference. First operand 1013 states and 1327 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 13:53:39,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-03-03 13:53:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:41,018 INFO L93 Difference]: Finished difference Result 2447 states and 3173 transitions. [2025-03-03 13:53:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 13:53:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 195 [2025-03-03 13:53:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:41,024 INFO L225 Difference]: With dead ends: 2447 [2025-03-03 13:53:41,024 INFO L226 Difference]: Without dead ends: 1205 [2025-03-03 13:53:41,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2025-03-03 13:53:41,027 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:41,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 367 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2025-03-03 13:53:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2025-03-03 13:53:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 879. [2025-03-03 13:53:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 658 states have (on average 1.1732522796352585) internal successors, (772), 661 states have internal predecessors, (772), 174 states have call successors, (174), 47 states have call predecessors, (174), 46 states have return successors, (173), 170 states have call predecessors, (173), 173 states have call successors, (173) [2025-03-03 13:53:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1119 transitions. [2025-03-03 13:53:41,136 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1119 transitions. Word has length 195 [2025-03-03 13:53:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:41,136 INFO L471 AbstractCegarLoop]: Abstraction has 879 states and 1119 transitions. [2025-03-03 13:53:41,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 13 states have internal predecessors, (45), 6 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 13:53:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1119 transitions. [2025-03-03 13:53:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2025-03-03 13:53:41,138 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:41,138 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 19, 19, 19, 19, 18, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:41,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 13:53:41,339 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,SelfDestructingSolverStorable15 [2025-03-03 13:53:41,339 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:41,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -239440702, now seen corresponding path program 1 times [2025-03-03 13:53:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:41,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721277684] [2025-03-03 13:53:41,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:41,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 195 statements into 1 equivalence classes. [2025-03-03 13:53:41,359 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 195 of 195 statements. [2025-03-03 13:53:41,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:41,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 44 proven. 690 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2025-03-03 13:53:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721277684] [2025-03-03 13:53:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721277684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775876570] [2025-03-03 13:53:41,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:53:41,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:41,993 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:41,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 13:53:42,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 195 statements into 1 equivalence classes. [2025-03-03 13:53:42,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 195 of 195 statements. [2025-03-03 13:53:42,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:53:42,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:42,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 13:53:42,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 44 proven. 1614 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:42,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 44 proven. 690 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2025-03-03 13:53:42,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775876570] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:42,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:42,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 50 [2025-03-03 13:53:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924056818] [2025-03-03 13:53:42,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:42,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-03 13:53:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:42,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-03 13:53:42,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 13:53:42,878 INFO L87 Difference]: Start difference. First operand 879 states and 1119 transitions. Second operand has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 46 states have call predecessors, (72), 46 states have call successors, (72) [2025-03-03 13:53:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:44,370 INFO L93 Difference]: Finished difference Result 928 states and 1185 transitions. [2025-03-03 13:53:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-03-03 13:53:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 46 states have call predecessors, (72), 46 states have call successors, (72) Word has length 195 [2025-03-03 13:53:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:44,375 INFO L225 Difference]: With dead ends: 928 [2025-03-03 13:53:44,375 INFO L226 Difference]: Without dead ends: 923 [2025-03-03 13:53:44,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2025-03-03 13:53:44,378 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 1037 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:44,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 584 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 13:53:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2025-03-03 13:53:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 917. [2025-03-03 13:53:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 686 states have (on average 1.1457725947521866) internal successors, (786), 691 states have internal predecessors, (786), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (181), 176 states have call predecessors, (181), 181 states have call successors, (181) [2025-03-03 13:53:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1149 transitions. [2025-03-03 13:53:44,497 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1149 transitions. Word has length 195 [2025-03-03 13:53:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:44,497 INFO L471 AbstractCegarLoop]: Abstraction has 917 states and 1149 transitions. [2025-03-03 13:53:44,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.4) internal successors, (220), 50 states have internal predecessors, (220), 47 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 46 states have call predecessors, (72), 46 states have call successors, (72) [2025-03-03 13:53:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1149 transitions. [2025-03-03 13:53:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2025-03-03 13:53:44,503 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:44,503 INFO L218 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 43, 43, 43, 43, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:44,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 13:53:44,703 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,SelfDestructingSolverStorable16 [2025-03-03 13:53:44,703 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:44,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1195497854, now seen corresponding path program 4 times [2025-03-03 13:53:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738282652] [2025-03-03 13:53:44,704 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:44,714 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 375 statements into 2 equivalence classes. [2025-03-03 13:53:44,825 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 375 of 375 statements. [2025-03-03 13:53:44,825 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:53:44,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 88 proven. 3700 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2025-03-03 13:53:46,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738282652] [2025-03-03 13:53:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738282652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:46,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061248701] [2025-03-03 13:53:46,981 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:46,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:46,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:46,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:46,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 13:53:47,025 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 375 statements into 2 equivalence classes. [2025-03-03 13:53:47,130 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 375 of 375 statements. [2025-03-03 13:53:47,130 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:53:47,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:47,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-03 13:53:47,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:53:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 90 proven. 7482 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:53:47,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:53:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7576 backedges. 90 proven. 3698 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2025-03-03 13:53:49,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061248701] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:53:49,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:53:49,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 48] total 97 [2025-03-03 13:53:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713536840] [2025-03-03 13:53:49,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:53:49,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-03-03 13:53:49,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:53:49,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-03-03 13:53:49,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4378, Invalid=4934, Unknown=0, NotChecked=0, Total=9312 [2025-03-03 13:53:49,493 INFO L87 Difference]: Start difference. First operand 917 states and 1149 transitions. Second operand has 97 states, 97 states have (on average 4.412371134020619) internal successors, (428), 97 states have internal predecessors, (428), 91 states have call successors, (139), 47 states have call predecessors, (139), 46 states have return successors, (138), 90 states have call predecessors, (138), 90 states have call successors, (138) [2025-03-03 13:53:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:53:56,703 INFO L93 Difference]: Finished difference Result 2935 states and 3868 transitions. [2025-03-03 13:53:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2025-03-03 13:53:56,703 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.412371134020619) internal successors, (428), 97 states have internal predecessors, (428), 91 states have call successors, (139), 47 states have call predecessors, (139), 46 states have return successors, (138), 90 states have call predecessors, (138), 90 states have call successors, (138) Word has length 375 [2025-03-03 13:53:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:53:56,714 INFO L225 Difference]: With dead ends: 2935 [2025-03-03 13:53:56,714 INFO L226 Difference]: Without dead ends: 2871 [2025-03-03 13:53:56,719 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10040 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16799, Invalid=36331, Unknown=0, NotChecked=0, Total=53130 [2025-03-03 13:53:56,719 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 3728 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 1983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3728 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1983 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:53:56,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3728 Valid, 1252 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1983 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-03 13:53:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2025-03-03 13:53:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2642. [2025-03-03 13:53:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 1958 states have (on average 1.232890704800817) internal successors, (2414), 2050 states have internal predecessors, (2414), 544 states have call successors, (544), 140 states have call predecessors, (544), 139 states have return successors, (543), 451 states have call predecessors, (543), 543 states have call successors, (543) [2025-03-03 13:53:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 3501 transitions. [2025-03-03 13:53:57,104 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 3501 transitions. Word has length 375 [2025-03-03 13:53:57,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:53:57,105 INFO L471 AbstractCegarLoop]: Abstraction has 2642 states and 3501 transitions. [2025-03-03 13:53:57,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.412371134020619) internal successors, (428), 97 states have internal predecessors, (428), 91 states have call successors, (139), 47 states have call predecessors, (139), 46 states have return successors, (138), 90 states have call predecessors, (138), 90 states have call successors, (138) [2025-03-03 13:53:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 3501 transitions. [2025-03-03 13:53:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2025-03-03 13:53:57,111 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:53:57,111 INFO L218 NwaCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 45, 44, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:53:57,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-03 13:53:57,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:57,312 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:53:57,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:53:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1489275117, now seen corresponding path program 4 times [2025-03-03 13:53:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:53:57,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146313779] [2025-03-03 13:53:57,312 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:57,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:53:57,323 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 389 statements into 2 equivalence classes. [2025-03-03 13:53:57,412 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 389 of 389 statements. [2025-03-03 13:53:57,414 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:53:57,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8198 backedges. 92 proven. 3962 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2025-03-03 13:53:59,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:53:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146313779] [2025-03-03 13:53:59,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146313779] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:53:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989612537] [2025-03-03 13:53:59,695 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:53:59,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:53:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:53:59,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:53:59,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 13:53:59,741 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 389 statements into 2 equivalence classes. [2025-03-03 13:53:59,833 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 389 of 389 statements. [2025-03-03 13:53:59,833 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:53:59,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:53:59,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-03-03 13:53:59,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:54:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8198 backedges. 94 proven. 8100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:54:00,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:54:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8198 backedges. 94 proven. 3960 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2025-03-03 13:54:02,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989612537] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:54:02,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:54:02,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 49, 50] total 100 [2025-03-03 13:54:02,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661536670] [2025-03-03 13:54:02,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:54:02,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2025-03-03 13:54:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:54:02,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2025-03-03 13:54:02,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4663, Invalid=5237, Unknown=0, NotChecked=0, Total=9900 [2025-03-03 13:54:02,213 INFO L87 Difference]: Start difference. First operand 2642 states and 3501 transitions. Second operand has 100 states, 100 states have (on average 4.42) internal successors, (442), 100 states have internal predecessors, (442), 95 states have call successors, (145), 49 states have call predecessors, (145), 48 states have return successors, (144), 94 states have call predecessors, (144), 94 states have call successors, (144) [2025-03-03 13:54:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:54:09,892 INFO L93 Difference]: Finished difference Result 3877 states and 5084 transitions. [2025-03-03 13:54:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2025-03-03 13:54:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 4.42) internal successors, (442), 100 states have internal predecessors, (442), 95 states have call successors, (145), 49 states have call predecessors, (145), 48 states have return successors, (144), 94 states have call predecessors, (144), 94 states have call successors, (144) Word has length 389 [2025-03-03 13:54:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:54:09,901 INFO L225 Difference]: With dead ends: 3877 [2025-03-03 13:54:09,901 INFO L226 Difference]: Without dead ends: 2132 [2025-03-03 13:54:09,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10539 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=17681, Invalid=38251, Unknown=0, NotChecked=0, Total=55932 [2025-03-03 13:54:09,909 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 3795 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 2126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2126 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-03 13:54:09,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3795 Valid, 1183 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2126 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-03 13:54:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2025-03-03 13:54:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1899. [2025-03-03 13:54:10,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1423 states have (on average 1.1700632466619818) internal successors, (1665), 1426 states have internal predecessors, (1665), 378 states have call successors, (378), 98 states have call predecessors, (378), 97 states have return successors, (377), 374 states have call predecessors, (377), 377 states have call successors, (377) [2025-03-03 13:54:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2420 transitions. [2025-03-03 13:54:10,182 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2420 transitions. Word has length 389 [2025-03-03 13:54:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:54:10,182 INFO L471 AbstractCegarLoop]: Abstraction has 1899 states and 2420 transitions. [2025-03-03 13:54:10,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 4.42) internal successors, (442), 100 states have internal predecessors, (442), 95 states have call successors, (145), 49 states have call predecessors, (145), 48 states have return successors, (144), 94 states have call predecessors, (144), 94 states have call successors, (144) [2025-03-03 13:54:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2420 transitions. [2025-03-03 13:54:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2025-03-03 13:54:10,186 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:54:10,186 INFO L218 NwaCegarLoop]: trace histogram [49, 48, 48, 45, 45, 45, 45, 44, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:54:10,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 13:54:10,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:10,388 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:54:10,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:54:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2069587982, now seen corresponding path program 2 times [2025-03-03 13:54:10,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:54:10,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961805758] [2025-03-03 13:54:10,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:54:10,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:54:10,403 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 403 statements into 2 equivalence classes. [2025-03-03 13:54:10,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 403 of 403 statements. [2025-03-03 13:54:10,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:54:10,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8578 backedges. 96 proven. 3966 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2025-03-03 13:54:12,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:54:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961805758] [2025-03-03 13:54:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961805758] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:54:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938678403] [2025-03-03 13:54:12,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:54:12,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:12,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:54:12,659 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:54:12,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 13:54:12,710 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 403 statements into 2 equivalence classes. [2025-03-03 13:54:12,793 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 403 of 403 statements. [2025-03-03 13:54:12,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:54:12,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:54:12,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 99 conjuncts are in the unsatisfiable core [2025-03-03 13:54:12,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:54:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8578 backedges. 96 proven. 8478 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 13:54:13,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:54:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8578 backedges. 96 proven. 3966 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2025-03-03 13:54:15,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938678403] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:54:15,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:54:15,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 52] total 102 [2025-03-03 13:54:15,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477965037] [2025-03-03 13:54:15,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:54:15,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2025-03-03 13:54:15,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:54:15,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2025-03-03 13:54:15,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2025-03-03 13:54:15,295 INFO L87 Difference]: Start difference. First operand 1899 states and 2420 transitions. Second operand has 102 states, 102 states have (on average 4.450980392156863) internal successors, (454), 102 states have internal predecessors, (454), 99 states have call successors, (151), 51 states have call predecessors, (151), 50 states have return successors, (150), 98 states have call predecessors, (150), 98 states have call successors, (150) [2025-03-03 13:54:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:54:22,400 INFO L93 Difference]: Finished difference Result 1973 states and 2522 transitions. [2025-03-03 13:54:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2025-03-03 13:54:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.450980392156863) internal successors, (454), 102 states have internal predecessors, (454), 99 states have call successors, (151), 51 states have call predecessors, (151), 50 states have return successors, (150), 98 states have call predecessors, (150), 98 states have call successors, (150) Word has length 403 [2025-03-03 13:54:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:54:22,409 INFO L225 Difference]: With dead ends: 1973 [2025-03-03 13:54:22,409 INFO L226 Difference]: Without dead ends: 1968 [2025-03-03 13:54:22,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 756 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14122, Invalid=24098, Unknown=0, NotChecked=0, Total=38220 [2025-03-03 13:54:22,414 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 3022 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 1858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3022 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1858 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:54:22,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3022 Valid, 1073 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1858 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-03 13:54:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2025-03-03 13:54:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1960. [2025-03-03 13:54:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1468 states have (on average 1.1416893732970028) internal successors, (1676), 1474 states have internal predecessors, (1676), 391 states have call successors, (391), 101 states have call predecessors, (391), 100 states have return successors, (390), 384 states have call predecessors, (390), 390 states have call successors, (390) [2025-03-03 13:54:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2457 transitions. [2025-03-03 13:54:22,685 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2457 transitions. Word has length 403 [2025-03-03 13:54:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:54:22,686 INFO L471 AbstractCegarLoop]: Abstraction has 1960 states and 2457 transitions. [2025-03-03 13:54:22,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.450980392156863) internal successors, (454), 102 states have internal predecessors, (454), 99 states have call successors, (151), 51 states have call predecessors, (151), 50 states have return successors, (150), 98 states have call predecessors, (150), 98 states have call successors, (150) [2025-03-03 13:54:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2457 transitions. [2025-03-03 13:54:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2025-03-03 13:54:22,694 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:54:22,694 INFO L218 NwaCegarLoop]: trace histogram [96, 95, 95, 94, 92, 92, 92, 92, 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] [2025-03-03 13:54:22,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 13:54:22,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:54:22,898 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:54:22,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:54:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1532004449, now seen corresponding path program 1 times [2025-03-03 13:54:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:54:22,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997392963] [2025-03-03 13:54:22,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:54:22,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:54:22,920 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 785 statements into 1 equivalence classes. [2025-03-03 13:54:22,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 785 of 785 statements. [2025-03-03 13:54:22,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:54:22,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat