./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-63.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-63.i -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 31ed4c1d4c56093916e3e6078a050f9b467d4295a9560366c0e4e3c015413196 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 02:56:45,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 02:56:45,821 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 02:56:45,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 02:56:45,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 02:56:45,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 02:56:45,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 02:56:45,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 02:56:45,843 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 02:56:45,843 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 02:56:45,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 02:56:45,844 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 02:56:45,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 02:56:45,844 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 02:56:45,844 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 02:56:45,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 02:56:45,845 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 02:56:45,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 02:56:45,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 02:56:45,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 02:56:45,846 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 -> 31ed4c1d4c56093916e3e6078a050f9b467d4295a9560366c0e4e3c015413196 [2025-03-17 02:56:46,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 02:56:46,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 02:56:46,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 02:56:46,069 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 02:56:46,069 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 02:56:46,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-63.i [2025-03-17 02:56:47,233 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d45f2881/8f4c77ce7b754b6dbd4bf0579da8a5a9/FLAG028810ae1 [2025-03-17 02:56:47,454 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 02:56:47,454 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-63.i [2025-03-17 02:56:47,461 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d45f2881/8f4c77ce7b754b6dbd4bf0579da8a5a9/FLAG028810ae1 [2025-03-17 02:56:47,784 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d45f2881/8f4c77ce7b754b6dbd4bf0579da8a5a9 [2025-03-17 02:56:47,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 02:56:47,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 02:56:47,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 02:56:47,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 02:56:47,791 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 02:56:47,792 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:47,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dd4e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47, skipping insertion in model container [2025-03-17 02:56:47,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:47,808 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 02:56:47,900 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/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-63.i[916,929] [2025-03-17 02:56:47,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 02:56:47,939 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 02:56:47,945 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/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-63.i[916,929] [2025-03-17 02:56:47,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 02:56:47,983 INFO L204 MainTranslator]: Completed translation [2025-03-17 02:56:47,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47 WrapperNode [2025-03-17 02:56:47,983 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 02:56:47,984 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 02:56:47,984 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 02:56:47,984 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 02:56:47,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:47,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,010 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 127 [2025-03-17 02:56:48,014 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 02:56:48,015 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 02:56:48,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 02:56:48,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 02:56:48,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,030 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]. [2025-03-17 02:56:48,030 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,030 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,036 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 02:56:48,040 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 02:56:48,040 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 02:56:48,040 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 02:56:48,040 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (1/1) ... [2025-03-17 02:56:48,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 02:56:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 02:56:48,069 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) [2025-03-17 02:56:48,074 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 [2025-03-17 02:56:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 02:56:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-17 02:56:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-17 02:56:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 02:56:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 02:56:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 02:56:48,132 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 02:56:48,134 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 02:56:48,352 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-17 02:56:48,353 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 02:56:48,359 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 02:56:48,361 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 02:56:48,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:56:48 BoogieIcfgContainer [2025-03-17 02:56:48,361 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 02:56:48,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 02:56:48,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 02:56:48,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 02:56:48,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:56:47" (1/3) ... [2025-03-17 02:56:48,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aea0688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:56:48, skipping insertion in model container [2025-03-17 02:56:48,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:56:47" (2/3) ... [2025-03-17 02:56:48,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aea0688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:56:48, skipping insertion in model container [2025-03-17 02:56:48,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:56:48" (3/3) ... [2025-03-17 02:56:48,368 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_floatingpointinfluence_no-floats_file-63.i [2025-03-17 02:56:48,379 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 02:56:48,381 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_floatingpointinfluence_no-floats_file-63.i that has 2 procedures, 50 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-17 02:56:48,428 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 02:56:48,438 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;@322415b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 02:56:48,439 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-17 02:56:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-17 02:56:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-03-17 02:56:48,451 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 02:56:48,451 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 02:56:48,452 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 02:56:48,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 02:56:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash -775937305, now seen corresponding path program 1 times [2025-03-17 02:56:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 02:56:48,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506199647] [2025-03-17 02:56:48,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 02:56:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 02:56:48,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 02:56:48,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 02:56:48,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 02:56:48,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 02:56:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2025-03-17 02:56:48,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 02:56:48,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506199647] [2025-03-17 02:56:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506199647] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 02:56:48,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469005364] [2025-03-17 02:56:48,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 02:56:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 02:56:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 02:56:48,717 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) [2025-03-17 02:56:48,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 02:56:48,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 02:56:48,841 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 02:56:48,841 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 02:56:48,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 02:56:48,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-17 02:56:48,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 02:56:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2025-03-17 02:56:48,879 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 02:56:48,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469005364] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 02:56:48,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 02:56:48,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-17 02:56:48,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250294963] [2025-03-17 02:56:48,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 02:56:48,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 02:56:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 02:56:48,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 02:56:48,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 02:56:48,901 INFO L87 Difference]: Start difference. First operand has 50 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2025-03-17 02:56:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 02:56:48,920 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2025-03-17 02:56:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 02:56:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 130 [2025-03-17 02:56:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 02:56:48,935 INFO L225 Difference]: With dead ends: 97 [2025-03-17 02:56:48,935 INFO L226 Difference]: Without dead ends: 48 [2025-03-17 02:56:48,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 02:56:48,941 INFO L435 NwaCegarLoop]: 72 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, 72 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 [2025-03-17 02:56:48,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 02:56:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-03-17 02:56:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2025-03-17 02:56:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-17 02:56:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2025-03-17 02:56:48,969 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 130 [2025-03-17 02:56:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 02:56:48,970 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2025-03-17 02:56:48,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2025-03-17 02:56:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2025-03-17 02:56:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-03-17 02:56:48,973 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 02:56:48,973 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 02:56:48,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 02:56:49,177 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 [2025-03-17 02:56:49,177 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 02:56:49,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 02:56:49,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1639868295, now seen corresponding path program 1 times [2025-03-17 02:56:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 02:56:49,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174959020] [2025-03-17 02:56:49,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 02:56:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 02:56:49,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 02:56:49,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 02:56:49,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 02:56:49,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 02:56:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2025-03-17 02:56:49,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 02:56:49,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174959020] [2025-03-17 02:56:49,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174959020] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 02:56:49,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 02:56:49,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 02:56:49,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714741772] [2025-03-17 02:56:49,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 02:56:49,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 02:56:49,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 02:56:49,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 02:56:49,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 02:56:49,683 INFO L87 Difference]: Start difference. First operand 48 states and 72 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2025-03-17 02:56:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 02:56:49,932 INFO L93 Difference]: Finished difference Result 99 states and 146 transitions. [2025-03-17 02:56:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 02:56:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 130 [2025-03-17 02:56:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 02:56:49,935 INFO L225 Difference]: With dead ends: 99 [2025-03-17 02:56:49,936 INFO L226 Difference]: Without dead ends: 52 [2025-03-17 02:56:49,937 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-17 02:56:49,938 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 83 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 02:56:49,938 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 95 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 02:56:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-03-17 02:56:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2025-03-17 02:56:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-17 02:56:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2025-03-17 02:56:49,953 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 130 [2025-03-17 02:56:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 02:56:49,953 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2025-03-17 02:56:49,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2025-03-17 02:56:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2025-03-17 02:56:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-03-17 02:56:49,955 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 02:56:49,955 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 02:56:49,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 02:56:49,955 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 02:56:49,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 02:56:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1640791816, now seen corresponding path program 1 times [2025-03-17 02:56:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 02:56:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626060850] [2025-03-17 02:56:49,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 02:56:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 02:56:49,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 02:56:50,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 02:56:50,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 02:56:50,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 02:56:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2025-03-17 02:56:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 02:56:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626060850] [2025-03-17 02:56:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626060850] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 02:56:54,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 02:56:54,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-17 02:56:54,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325104111] [2025-03-17 02:56:54,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 02:56:54,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 02:56:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 02:56:54,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 02:56:54,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 02:56:54,326 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2025-03-17 02:56:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 02:56:55,077 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2025-03-17 02:56:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 02:56:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 130 [2025-03-17 02:56:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 02:56:55,079 INFO L225 Difference]: With dead ends: 101 [2025-03-17 02:56:55,079 INFO L226 Difference]: Without dead ends: 99 [2025-03-17 02:56:55,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2025-03-17 02:56:55,080 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 115 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-17 02:56:55,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 264 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-17 02:56:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-17 02:56:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2025-03-17 02:56:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2025-03-17 02:56:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2025-03-17 02:56:55,103 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 130 [2025-03-17 02:56:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 02:56:55,104 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2025-03-17 02:56:55,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2025-03-17 02:56:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2025-03-17 02:56:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-03-17 02:56:55,106 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 02:56:55,106 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 02:56:55,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 02:56:55,106 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 02:56:55,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 02:56:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1766671799, now seen corresponding path program 1 times [2025-03-17 02:56:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 02:56:55,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521326376] [2025-03-17 02:56:55,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 02:56:55,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 02:56:55,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 02:56:55,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 02:56:55,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 02:56:55,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 02:56:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2025-03-17 02:56:56,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 02:56:56,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521326376] [2025-03-17 02:56:56,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521326376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 02:56:56,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702880673] [2025-03-17 02:56:56,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 02:56:56,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 02:56:56,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 02:56:56,311 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) [2025-03-17 02:56:56,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 02:56:56,348 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 130 statements into 1 equivalence classes. [2025-03-17 02:56:56,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 130 of 130 statements. [2025-03-17 02:56:56,381 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 02:56:56,381 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 02:56:56,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 02:56:56,394 INFO L279 TraceCheckSpWp]: Computing forward predicates...