./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-4.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_operatoramount_amount250_file-4.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 64123f5116db47fa03ac4ec656265c4b4fc7f86761672b728533a9657e1ff5e6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 15:21:49,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 15:21:49,680 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 15:21:49,684 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 15:21:49,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 15:21:49,705 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 15:21:49,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 15:21:49,706 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 15:21:49,706 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 15:21:49,707 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 15:21:49,707 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 15:21:49,708 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 15:21:49,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 15:21:49,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 15:21:49,709 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 15:21:49,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 15:21:49,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 15:21:49,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 15:21:49,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 15:21:49,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 15:21:49,711 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 -> 64123f5116db47fa03ac4ec656265c4b4fc7f86761672b728533a9657e1ff5e6 [2025-03-08 15:21:49,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 15:21:49,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 15:21:49,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 15:21:49,921 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 15:21:49,922 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 15:21:49,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-4.i [2025-03-08 15:21:51,041 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47eb1932e/92e446dbaf8342ecb15a09dc1119e27f/FLAGa59cc276b [2025-03-08 15:21:51,324 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 15:21:51,329 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-4.i [2025-03-08 15:21:51,340 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47eb1932e/92e446dbaf8342ecb15a09dc1119e27f/FLAGa59cc276b [2025-03-08 15:21:51,597 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47eb1932e/92e446dbaf8342ecb15a09dc1119e27f [2025-03-08 15:21:51,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 15:21:51,599 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 15:21:51,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 15:21:51,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 15:21:51,604 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 15:21:51,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:51,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5989a0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51, skipping insertion in model container [2025-03-08 15:21:51,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:51,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 15:21:51,734 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_operatoramount_amount250_file-4.i[915,928] [2025-03-08 15:21:51,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 15:21:51,870 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 15:21:51,881 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_operatoramount_amount250_file-4.i[915,928] [2025-03-08 15:21:51,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 15:21:51,960 INFO L204 MainTranslator]: Completed translation [2025-03-08 15:21:51,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51 WrapperNode [2025-03-08 15:21:51,961 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 15:21:51,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 15:21:51,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 15:21:51,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 15:21:51,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:51,976 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,025 INFO L138 Inliner]: procedures = 26, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 381 [2025-03-08 15:21:52,025 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 15:21:52,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 15:21:52,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 15:21:52,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 15:21:52,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,046 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,079 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 15:21:52,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,099 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,118 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 15:21:52,119 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 15:21:52,119 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 15:21:52,119 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 15:21:52,120 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (1/1) ... [2025-03-08 15:21:52,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 15:21:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:21:52,150 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 15:21:52,152 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 15:21:52,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 15:21:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 15:21:52,169 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 15:21:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 15:21:52,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 15:21:52,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 15:21:52,257 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 15:21:52,258 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 15:21:52,842 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L359: havoc property_#t~ite33#1;havoc property_#t~bitwise32#1;havoc property_#t~short34#1; [2025-03-08 15:21:52,889 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2025-03-08 15:21:52,889 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 15:21:52,911 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 15:21:52,912 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 15:21:52,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 03:21:52 BoogieIcfgContainer [2025-03-08 15:21:52,912 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 15:21:52,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 15:21:52,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 15:21:52,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 15:21:52,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 03:21:51" (1/3) ... [2025-03-08 15:21:52,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa8160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 03:21:52, skipping insertion in model container [2025-03-08 15:21:52,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 03:21:51" (2/3) ... [2025-03-08 15:21:52,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa8160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 03:21:52, skipping insertion in model container [2025-03-08 15:21:52,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 03:21:52" (3/3) ... [2025-03-08 15:21:52,919 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-4.i [2025-03-08 15:21:52,929 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 15:21:52,932 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_operatoramount_amount250_file-4.i that has 2 procedures, 157 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 15:21:53,001 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 15:21:53,011 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;@65905ff8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 15:21:53,011 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 15:21:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 107 states have (on average 1.4672897196261683) internal successors, (157), 108 states have internal predecessors, (157), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2025-03-08 15:21:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2025-03-08 15:21:53,030 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:21:53,031 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:21:53,031 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:21:53,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:21:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash 78475465, now seen corresponding path program 1 times [2025-03-08 15:21:53,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:21:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989590755] [2025-03-08 15:21:53,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:21:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:21:53,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-03-08 15:21:53,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-03-08 15:21:53,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:21:53,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:21:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2025-03-08 15:21:53,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:21:53,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989590755] [2025-03-08 15:21:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989590755] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:21:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134481272] [2025-03-08 15:21:53,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:21:53,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:21:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:21:53,424 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 15:21:53,426 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 15:21:53,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-03-08 15:21:53,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-03-08 15:21:53,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:21:53,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:21:53,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 15:21:53,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:21:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2025-03-08 15:21:53,704 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 15:21:53,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134481272] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:21:53,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 15:21:53,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 15:21:53,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30079407] [2025-03-08 15:21:53,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:21:53,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 15:21:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:21:53,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 15:21:53,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 15:21:53,727 INFO L87 Difference]: Start difference. First operand has 157 states, 107 states have (on average 1.4672897196261683) internal successors, (157), 108 states have internal predecessors, (157), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) [2025-03-08 15:21:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:21:53,768 INFO L93 Difference]: Finished difference Result 308 states and 544 transitions. [2025-03-08 15:21:53,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 15:21:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) Word has length 311 [2025-03-08 15:21:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:21:53,776 INFO L225 Difference]: With dead ends: 308 [2025-03-08 15:21:53,776 INFO L226 Difference]: Without dead ends: 154 [2025-03-08 15:21:53,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 312 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 15:21:53,780 INFO L435 NwaCegarLoop]: 244 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 15:21:53,781 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 244 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 15:21:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-08 15:21:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2025-03-08 15:21:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 105 states have internal predecessors, (152), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2025-03-08 15:21:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 246 transitions. [2025-03-08 15:21:53,820 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 246 transitions. Word has length 311 [2025-03-08 15:21:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:21:53,822 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 246 transitions. [2025-03-08 15:21:53,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 2 states have call successors, (47) [2025-03-08 15:21:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 246 transitions. [2025-03-08 15:21:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2025-03-08 15:21:53,829 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:21:53,829 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:21:53,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 15:21:54,030 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 15:21:54,030 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:21:54,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:21:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2129303984, now seen corresponding path program 1 times [2025-03-08 15:21:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:21:54,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393327608] [2025-03-08 15:21:54,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:21:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:21:54,058 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-03-08 15:21:54,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-03-08 15:21:54,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:21:54,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:21:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2025-03-08 15:21:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:21:54,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393327608] [2025-03-08 15:21:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393327608] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:21:54,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:21:54,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 15:21:54,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926164302] [2025-03-08 15:21:54,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:21:54,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 15:21:54,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:21:54,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 15:21:54,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 15:21:54,621 INFO L87 Difference]: Start difference. First operand 154 states and 246 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2025-03-08 15:21:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:21:54,910 INFO L93 Difference]: Finished difference Result 424 states and 678 transitions. [2025-03-08 15:21:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 15:21:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 311 [2025-03-08 15:21:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:21:54,917 INFO L225 Difference]: With dead ends: 424 [2025-03-08 15:21:54,917 INFO L226 Difference]: Without dead ends: 273 [2025-03-08 15:21:54,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 15:21:54,921 INFO L435 NwaCegarLoop]: 418 mSDtfsCounter, 183 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 15:21:54,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 951 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 15:21:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2025-03-08 15:21:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 158. [2025-03-08 15:21:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 109 states have (on average 1.4495412844036697) internal successors, (158), 109 states have internal predecessors, (158), 47 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2025-03-08 15:21:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 252 transitions. [2025-03-08 15:21:54,949 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 252 transitions. Word has length 311 [2025-03-08 15:21:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:21:54,951 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 252 transitions. [2025-03-08 15:21:54,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2025-03-08 15:21:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 252 transitions. [2025-03-08 15:21:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2025-03-08 15:21:54,958 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:21:54,958 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:21:54,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 15:21:54,959 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:21:54,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:21:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash -621752175, now seen corresponding path program 1 times [2025-03-08 15:21:54,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:21:54,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985874850] [2025-03-08 15:21:54,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:21:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:21:54,995 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-03-08 15:21:55,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-03-08 15:21:55,280 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:21:55,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:21:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2025-03-08 15:21:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:21:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985874850] [2025-03-08 15:21:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985874850] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 15:21:55,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 15:21:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 15:21:55,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886776188] [2025-03-08 15:21:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 15:21:55,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 15:21:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:21:55,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 15:21:55,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 15:21:55,714 INFO L87 Difference]: Start difference. First operand 158 states and 252 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2025-03-08 15:21:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:21:55,912 INFO L93 Difference]: Finished difference Result 469 states and 751 transitions. [2025-03-08 15:21:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 15:21:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) Word has length 311 [2025-03-08 15:21:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:21:55,916 INFO L225 Difference]: With dead ends: 469 [2025-03-08 15:21:55,916 INFO L226 Difference]: Without dead ends: 314 [2025-03-08 15:21:55,916 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 15:21:55,917 INFO L435 NwaCegarLoop]: 241 mSDtfsCounter, 204 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 15:21:55,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 712 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 15:21:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2025-03-08 15:21:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 250. [2025-03-08 15:21:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 153 states have (on average 1.3725490196078431) internal successors, (210), 153 states have internal predecessors, (210), 94 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2025-03-08 15:21:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 398 transitions. [2025-03-08 15:21:55,943 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 398 transitions. Word has length 311 [2025-03-08 15:21:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:21:55,943 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 398 transitions. [2025-03-08 15:21:55,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (47), 1 states have call predecessors, (47), 1 states have return successors, (47), 1 states have call predecessors, (47), 1 states have call successors, (47) [2025-03-08 15:21:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 398 transitions. [2025-03-08 15:21:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2025-03-08 15:21:55,946 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:21:55,946 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:21:55,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 15:21:55,946 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:21:55,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:21:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash -291986414, now seen corresponding path program 1 times [2025-03-08 15:21:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:21:55,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951902081] [2025-03-08 15:21:55,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:21:55,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:21:55,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-03-08 15:21:56,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-03-08 15:21:56,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:21:56,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:21:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2025-03-08 15:21:57,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:21:57,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951902081] [2025-03-08 15:21:57,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951902081] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:21:57,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009582225] [2025-03-08 15:21:57,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:21:57,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:21:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:21:57,503 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 15:21:57,505 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 15:21:57,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 311 statements into 1 equivalence classes. [2025-03-08 15:21:57,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 311 of 311 statements. [2025-03-08 15:21:57,695 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:21:57,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:21:57,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 15:21:57,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:21:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 319 proven. 129 refuted. 0 times theorem prover too weak. 3876 trivial. 0 not checked. [2025-03-08 15:21:59,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:21:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 135 proven. 3 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2025-03-08 15:21:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009582225] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:21:59,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:21:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2025-03-08 15:21:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803660246] [2025-03-08 15:21:59,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:21:59,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 15:21:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:21:59,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 15:21:59,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-08 15:21:59,832 INFO L87 Difference]: Start difference. First operand 250 states and 398 transitions. Second operand has 22 states, 22 states have (on average 8.590909090909092) internal successors, (189), 20 states have internal predecessors, (189), 6 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 6 states have call predecessors, (141), 6 states have call successors, (141) [2025-03-08 15:22:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:22:02,006 INFO L93 Difference]: Finished difference Result 782 states and 1243 transitions. [2025-03-08 15:22:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 15:22:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.590909090909092) internal successors, (189), 20 states have internal predecessors, (189), 6 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 6 states have call predecessors, (141), 6 states have call successors, (141) Word has length 311 [2025-03-08 15:22:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:22:02,010 INFO L225 Difference]: With dead ends: 782 [2025-03-08 15:22:02,011 INFO L226 Difference]: Without dead ends: 617 [2025-03-08 15:22:02,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1361, Unknown=0, NotChecked=0, Total=1722 [2025-03-08 15:22:02,012 INFO L435 NwaCegarLoop]: 251 mSDtfsCounter, 1131 mSDsluCounter, 2312 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-08 15:22:02,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 2563 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-08 15:22:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2025-03-08 15:22:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 399. [2025-03-08 15:22:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 252 states have (on average 1.376984126984127) internal successors, (347), 252 states have internal predecessors, (347), 141 states have call successors, (141), 5 states have call predecessors, (141), 5 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2025-03-08 15:22:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 629 transitions. [2025-03-08 15:22:02,068 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 629 transitions. Word has length 311 [2025-03-08 15:22:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:22:02,070 INFO L471 AbstractCegarLoop]: Abstraction has 399 states and 629 transitions. [2025-03-08 15:22:02,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.590909090909092) internal successors, (189), 20 states have internal predecessors, (189), 6 states have call successors, (141), 3 states have call predecessors, (141), 6 states have return successors, (141), 6 states have call predecessors, (141), 6 states have call successors, (141) [2025-03-08 15:22:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 629 transitions. [2025-03-08 15:22:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2025-03-08 15:22:02,072 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:22:02,072 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:22:02,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 15:22:02,277 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,SelfDestructingSolverStorable3 [2025-03-08 15:22:02,277 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:22:02,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:22:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 997660343, now seen corresponding path program 1 times [2025-03-08 15:22:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:22:02,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017790717] [2025-03-08 15:22:02,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:22:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:22:02,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 312 statements into 1 equivalence classes. [2025-03-08 15:22:02,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 312 of 312 statements. [2025-03-08 15:22:02,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:22:02,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:22:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 18 proven. 120 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2025-03-08 15:22:02,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 15:22:02,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017790717] [2025-03-08 15:22:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017790717] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 15:22:02,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932932057] [2025-03-08 15:22:02,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:22:02,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:22:02,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 15:22:02,983 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 15:22:02,985 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 15:22:03,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 312 statements into 1 equivalence classes. [2025-03-08 15:22:03,143 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 312 of 312 statements. [2025-03-08 15:22:03,144 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:22:03,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 15:22:03,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 15:22:03,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 15:22:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2672 proven. 276 refuted. 0 times theorem prover too weak. 1376 trivial. 0 not checked. [2025-03-08 15:22:04,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 15:22:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 99 proven. 174 refuted. 0 times theorem prover too weak. 4051 trivial. 0 not checked. [2025-03-08 15:22:05,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932932057] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 15:22:05,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 15:22:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 11] total 29 [2025-03-08 15:22:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334310617] [2025-03-08 15:22:05,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 15:22:05,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 15:22:05,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 15:22:05,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 15:22:05,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2025-03-08 15:22:05,712 INFO L87 Difference]: Start difference. First operand 399 states and 629 transitions. Second operand has 29 states, 29 states have (on average 7.689655172413793) internal successors, (223), 28 states have internal predecessors, (223), 8 states have call successors, (134), 5 states have call predecessors, (134), 10 states have return successors, (135), 8 states have call predecessors, (135), 8 states have call successors, (135) [2025-03-08 15:22:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 15:22:10,497 INFO L93 Difference]: Finished difference Result 1594 states and 2389 transitions. [2025-03-08 15:22:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2025-03-08 15:22:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.689655172413793) internal successors, (223), 28 states have internal predecessors, (223), 8 states have call successors, (134), 5 states have call predecessors, (134), 10 states have return successors, (135), 8 states have call predecessors, (135), 8 states have call successors, (135) Word has length 312 [2025-03-08 15:22:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 15:22:10,510 INFO L225 Difference]: With dead ends: 1594 [2025-03-08 15:22:10,510 INFO L226 Difference]: Without dead ends: 1296 [2025-03-08 15:22:10,513 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 609 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2489, Invalid=9501, Unknown=0, NotChecked=0, Total=11990 [2025-03-08 15:22:10,514 INFO L435 NwaCegarLoop]: 327 mSDtfsCounter, 3268 mSDsluCounter, 2630 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3268 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 4579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 621 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2025-03-08 15:22:10,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3268 Valid, 2957 Invalid, 4579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [621 Valid, 3958 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2025-03-08 15:22:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2025-03-08 15:22:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 848. [2025-03-08 15:22:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 581 states have (on average 1.3614457831325302) internal successors, (791), 581 states have internal predecessors, (791), 235 states have call successors, (235), 31 states have call predecessors, (235), 31 states have return successors, (235), 235 states have call predecessors, (235), 235 states have call successors, (235) [2025-03-08 15:22:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1261 transitions. [2025-03-08 15:22:10,592 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1261 transitions. Word has length 312 [2025-03-08 15:22:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 15:22:10,592 INFO L471 AbstractCegarLoop]: Abstraction has 848 states and 1261 transitions. [2025-03-08 15:22:10,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.689655172413793) internal successors, (223), 28 states have internal predecessors, (223), 8 states have call successors, (134), 5 states have call predecessors, (134), 10 states have return successors, (135), 8 states have call predecessors, (135), 8 states have call successors, (135) [2025-03-08 15:22:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1261 transitions. [2025-03-08 15:22:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2025-03-08 15:22:10,595 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 15:22:10,595 INFO L218 NwaCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:22:10,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 15:22:10,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 15:22:10,796 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 15:22:10,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 15:22:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash -574808424, now seen corresponding path program 1 times [2025-03-08 15:22:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 15:22:10,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997155063] [2025-03-08 15:22:10,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 15:22:10,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 15:22:10,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 312 statements into 1 equivalence classes. [2025-03-08 15:22:11,253 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 312 of 312 statements. [2025-03-08 15:22:11,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 15:22:11,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat