./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-51.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-51.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 ba41fad7f72744fe0e42c26f1418f056b21d09a04b2ad100829310a14fd9d787 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 13:59:01,042 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 13:59:01,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 13:59:01,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 13:59:01,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 13:59:01,122 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 13:59:01,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 13:59:01,123 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 13:59:01,123 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 13:59:01,123 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 13:59:01,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 13:59:01,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 13:59:01,125 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 13:59:01,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 13:59:01,126 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 13:59:01,126 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 13:59:01,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 13:59:01,126 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 -> ba41fad7f72744fe0e42c26f1418f056b21d09a04b2ad100829310a14fd9d787 [2025-03-08 13:59:01,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 13:59:01,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 13:59:01,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 13:59:01,353 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 13:59:01,353 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 13:59:01,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-51.i [2025-03-08 13:59:02,494 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39d5eb2b/44bb51ac0dd846cda39402f48a77bc8e/FLAG25e1546bc [2025-03-08 13:59:02,729 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 13:59:02,729 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-51.i [2025-03-08 13:59:02,736 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39d5eb2b/44bb51ac0dd846cda39402f48a77bc8e/FLAG25e1546bc [2025-03-08 13:59:03,072 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d39d5eb2b/44bb51ac0dd846cda39402f48a77bc8e [2025-03-08 13:59:03,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 13:59:03,076 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 13:59:03,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 13:59:03,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 13:59:03,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 13:59:03,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d389e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03, skipping insertion in model container [2025-03-08 13:59:03,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,101 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 13:59:03,188 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_loopvsstraightlinecode_100-1loop_file-51.i[916,929] [2025-03-08 13:59:03,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 13:59:03,288 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 13:59:03,298 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_loopvsstraightlinecode_100-1loop_file-51.i[916,929] [2025-03-08 13:59:03,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 13:59:03,354 INFO L204 MainTranslator]: Completed translation [2025-03-08 13:59:03,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03 WrapperNode [2025-03-08 13:59:03,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 13:59:03,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 13:59:03,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 13:59:03,356 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 13:59:03,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,408 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 211 [2025-03-08 13:59:03,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 13:59:03,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 13:59:03,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 13:59:03,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 13:59:03,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,423 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,442 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 13:59:03,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,442 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,457 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 13:59:03,471 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 13:59:03,471 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 13:59:03,472 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 13:59:03,472 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (1/1) ... [2025-03-08 13:59:03,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 13:59:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 13:59:03,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 13:59:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 13:59:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 13:59:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 13:59:03,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 13:59:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 13:59:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 13:59:03,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 13:59:03,573 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 13:59:03,575 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 13:59:03,902 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2025-03-08 13:59:03,902 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 13:59:03,912 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 13:59:03,913 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 13:59:03,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 01:59:03 BoogieIcfgContainer [2025-03-08 13:59:03,913 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 13:59:03,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 13:59:03,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 13:59:03,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 13:59:03,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 01:59:03" (1/3) ... [2025-03-08 13:59:03,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6394de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 01:59:03, skipping insertion in model container [2025-03-08 13:59:03,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 01:59:03" (2/3) ... [2025-03-08 13:59:03,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6394de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 01:59:03, skipping insertion in model container [2025-03-08 13:59:03,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 01:59:03" (3/3) ... [2025-03-08 13:59:03,920 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-51.i [2025-03-08 13:59:03,931 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 13:59:03,933 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_loopvsstraightlinecode_100-1loop_file-51.i that has 2 procedures, 93 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 13:59:03,979 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 13:59:03,988 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;@4128818, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 13:59:03,988 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 13:59:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 59 states have internal predecessors, (82), 32 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2025-03-08 13:59:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2025-03-08 13:59:03,999 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 13:59:04,000 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 13:59:04,000 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 13:59:04,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 13:59:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1570203980, now seen corresponding path program 1 times [2025-03-08 13:59:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 13:59:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597410933] [2025-03-08 13:59:04,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 13:59:04,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 203 statements into 1 equivalence classes. [2025-03-08 13:59:04,122 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 203 of 203 statements. [2025-03-08 13:59:04,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:04,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2025-03-08 13:59:04,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 13:59:04,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597410933] [2025-03-08 13:59:04,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597410933] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 13:59:04,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904697849] [2025-03-08 13:59:04,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:04,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 13:59:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 13:59:04,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 13:59:04,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 13:59:04,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 203 statements into 1 equivalence classes. [2025-03-08 13:59:04,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 203 of 203 statements. [2025-03-08 13:59:04,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:04,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:04,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 13:59:04,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 13:59:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2025-03-08 13:59:04,514 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 13:59:04,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904697849] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 13:59:04,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 13:59:04,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 13:59:04,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800988188] [2025-03-08 13:59:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 13:59:04,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 13:59:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 13:59:04,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 13:59:04,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 13:59:04,532 INFO L87 Difference]: Start difference. First operand has 93 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 59 states have internal predecessors, (82), 32 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 2 states have call successors, (32) [2025-03-08 13:59:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 13:59:04,550 INFO L93 Difference]: Finished difference Result 183 states and 321 transitions. [2025-03-08 13:59:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 13:59:04,552 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 2 states have call successors, (32) Word has length 203 [2025-03-08 13:59:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 13:59:04,556 INFO L225 Difference]: With dead ends: 183 [2025-03-08 13:59:04,556 INFO L226 Difference]: Without dead ends: 90 [2025-03-08 13:59:04,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 13:59:04,560 INFO L435 NwaCegarLoop]: 144 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, 144 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 13:59:04,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 13:59:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-08 13:59:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2025-03-08 13:59:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.375) internal successors, (77), 56 states have internal predecessors, (77), 32 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2025-03-08 13:59:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 141 transitions. [2025-03-08 13:59:04,591 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 141 transitions. Word has length 203 [2025-03-08 13:59:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 13:59:04,591 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 141 transitions. [2025-03-08 13:59:04,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 2 states have call successors, (32) [2025-03-08 13:59:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 141 transitions. [2025-03-08 13:59:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2025-03-08 13:59:04,593 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 13:59:04,593 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 13:59:04,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 13:59:04,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-08 13:59:04,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 13:59:04,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 13:59:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash -269411350, now seen corresponding path program 1 times [2025-03-08 13:59:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 13:59:04,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043213548] [2025-03-08 13:59:04,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:04,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 13:59:04,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 203 statements into 1 equivalence classes. [2025-03-08 13:59:05,101 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 203 of 203 statements. [2025-03-08 13:59:05,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:05,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2025-03-08 13:59:05,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 13:59:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043213548] [2025-03-08 13:59:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043213548] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 13:59:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150170240] [2025-03-08 13:59:05,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:05,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 13:59:05,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 13:59:05,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 13:59:05,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 13:59:05,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 203 statements into 1 equivalence classes. [2025-03-08 13:59:05,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 203 of 203 statements. [2025-03-08 13:59:05,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:05,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:05,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 13:59:05,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 13:59:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 1011 proven. 51 refuted. 0 times theorem prover too weak. 922 trivial. 0 not checked. [2025-03-08 13:59:05,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 13:59:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2025-03-08 13:59:06,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150170240] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 13:59:06,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 13:59:06,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-03-08 13:59:06,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762804759] [2025-03-08 13:59:06,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 13:59:06,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 13:59:06,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 13:59:06,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 13:59:06,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-08 13:59:06,223 INFO L87 Difference]: Start difference. First operand 90 states and 141 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2025-03-08 13:59:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 13:59:06,463 INFO L93 Difference]: Finished difference Result 185 states and 286 transitions. [2025-03-08 13:59:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 13:59:06,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 203 [2025-03-08 13:59:06,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 13:59:06,466 INFO L225 Difference]: With dead ends: 185 [2025-03-08 13:59:06,466 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 13:59:06,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2025-03-08 13:59:06,468 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 128 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 13:59:06,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 242 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 13:59:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 13:59:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2025-03-08 13:59:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2025-03-08 13:59:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 143 transitions. [2025-03-08 13:59:06,480 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 143 transitions. Word has length 203 [2025-03-08 13:59:06,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 13:59:06,481 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 143 transitions. [2025-03-08 13:59:06,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2025-03-08 13:59:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 143 transitions. [2025-03-08 13:59:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2025-03-08 13:59:06,483 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 13:59:06,483 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 13:59:06,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 13:59:06,689 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 [2025-03-08 13:59:06,689 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 13:59:06,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 13:59:06,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1238140459, now seen corresponding path program 1 times [2025-03-08 13:59:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 13:59:06,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504682742] [2025-03-08 13:59:06,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 13:59:06,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 203 statements into 1 equivalence classes. [2025-03-08 13:59:06,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 203 of 203 statements. [2025-03-08 13:59:06,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:06,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2025-03-08 13:59:07,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 13:59:07,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504682742] [2025-03-08 13:59:07,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504682742] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 13:59:07,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 13:59:07,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 13:59:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523322890] [2025-03-08 13:59:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 13:59:07,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 13:59:07,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 13:59:07,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 13:59:07,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 13:59:07,206 INFO L87 Difference]: Start difference. First operand 94 states and 143 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) [2025-03-08 13:59:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 13:59:07,386 INFO L93 Difference]: Finished difference Result 277 states and 424 transitions. [2025-03-08 13:59:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 13:59:07,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) Word has length 203 [2025-03-08 13:59:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 13:59:07,392 INFO L225 Difference]: With dead ends: 277 [2025-03-08 13:59:07,393 INFO L226 Difference]: Without dead ends: 186 [2025-03-08 13:59:07,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-03-08 13:59:07,394 INFO L435 NwaCegarLoop]: 154 mSDtfsCounter, 128 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 13:59:07,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 616 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 13:59:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2025-03-08 13:59:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2025-03-08 13:59:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 114 states have internal predecessors, (150), 64 states have call successors, (64), 4 states have call predecessors, (64), 4 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2025-03-08 13:59:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 278 transitions. [2025-03-08 13:59:07,431 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 278 transitions. Word has length 203 [2025-03-08 13:59:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 13:59:07,433 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 278 transitions. [2025-03-08 13:59:07,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) [2025-03-08 13:59:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 278 transitions. [2025-03-08 13:59:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2025-03-08 13:59:07,435 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 13:59:07,435 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 13:59:07,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 13:59:07,435 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 13:59:07,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 13:59:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1164331781, now seen corresponding path program 1 times [2025-03-08 13:59:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 13:59:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608412390] [2025-03-08 13:59:07,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 13:59:07,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 204 statements into 1 equivalence classes. [2025-03-08 13:59:07,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 204 of 204 statements. [2025-03-08 13:59:07,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:07,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2025-03-08 13:59:07,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 13:59:07,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608412390] [2025-03-08 13:59:07,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608412390] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 13:59:07,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 13:59:07,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 13:59:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121834406] [2025-03-08 13:59:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 13:59:07,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 13:59:07,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 13:59:07,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 13:59:07,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 13:59:07,949 INFO L87 Difference]: Start difference. First operand 183 states and 278 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) [2025-03-08 13:59:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 13:59:08,248 INFO L93 Difference]: Finished difference Result 353 states and 527 transitions. [2025-03-08 13:59:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 13:59:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) Word has length 204 [2025-03-08 13:59:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 13:59:08,251 INFO L225 Difference]: With dead ends: 353 [2025-03-08 13:59:08,251 INFO L226 Difference]: Without dead ends: 262 [2025-03-08 13:59:08,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2025-03-08 13:59:08,252 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 182 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 13:59:08,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 314 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 13:59:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2025-03-08 13:59:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 194. [2025-03-08 13:59:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 123 states have (on average 1.2764227642276422) internal successors, (157), 123 states have internal predecessors, (157), 64 states have call successors, (64), 6 states have call predecessors, (64), 6 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2025-03-08 13:59:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 285 transitions. [2025-03-08 13:59:08,276 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 285 transitions. Word has length 204 [2025-03-08 13:59:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 13:59:08,277 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 285 transitions. [2025-03-08 13:59:08,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 1 states have call predecessors, (32), 1 states have call successors, (32) [2025-03-08 13:59:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 285 transitions. [2025-03-08 13:59:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2025-03-08 13:59:08,278 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 13:59:08,278 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 13:59:08,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 13:59:08,278 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 13:59:08,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 13:59:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1638274172, now seen corresponding path program 1 times [2025-03-08 13:59:08,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 13:59:08,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784137980] [2025-03-08 13:59:08,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 13:59:08,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 204 statements into 1 equivalence classes. [2025-03-08 13:59:08,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 204 of 204 statements. [2025-03-08 13:59:08,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:08,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 27 proven. 66 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2025-03-08 13:59:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 13:59:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784137980] [2025-03-08 13:59:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784137980] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 13:59:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376728024] [2025-03-08 13:59:08,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 13:59:08,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 13:59:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 13:59:08,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 13:59:08,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 13:59:08,993 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 204 statements into 1 equivalence classes. [2025-03-08 13:59:09,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 204 of 204 statements. [2025-03-08 13:59:09,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 13:59:09,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 13:59:09,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 13:59:09,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 13:59:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 771 proven. 45 refuted. 0 times theorem prover too weak. 1168 trivial. 0 not checked. [2025-03-08 13:59:10,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 14:00:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376728024] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 14:00:37,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 14:00:37,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 20 [2025-03-08 14:00:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336289447] [2025-03-08 14:00:37,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 14:00:37,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 14:00:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 14:00:37,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 14:00:37,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=408, Unknown=19, NotChecked=0, Total=506 [2025-03-08 14:00:37,497 INFO L87 Difference]: Start difference. First operand 194 states and 285 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 19 states have internal predecessors, (103), 6 states have call successors, (64), 5 states have call predecessors, (64), 7 states have return successors, (64), 6 states have call predecessors, (64), 6 states have call successors, (64)