./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-59.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_50-while_file-59.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 b76efa245cf05811296f1821b79f17cce14cc81fdc5d172c0831b55020eb32b3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 14:57:16,249 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 14:57:16,302 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 14:57:16,306 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 14:57:16,306 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 14:57:16,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 14:57:16,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 14:57:16,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 14:57:16,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 14:57:16,322 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 14:57:16,322 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 14:57:16,322 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 14:57:16,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 14:57:16,323 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 14:57:16,323 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 14:57:16,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 14:57:16,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 14:57:16,325 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 14:57:16,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 14:57:16,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 14:57:16,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 14:57:16,326 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 14:57:16,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 14:57:16,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 14:57:16,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 14:57:16,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 14:57:16,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 14:57:16,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 14:57:16,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 14:57:16,327 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 -> b76efa245cf05811296f1821b79f17cce14cc81fdc5d172c0831b55020eb32b3 [2025-03-08 14:57:16,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 14:57:16,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 14:57:16,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 14:57:16,595 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 14:57:16,596 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 14:57:16,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-59.i [2025-03-08 14:57:17,711 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee44376b/105ead465abe4c3094f8e44bb5997118/FLAG727545981 [2025-03-08 14:57:17,947 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 14:57:17,948 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-59.i [2025-03-08 14:57:17,955 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee44376b/105ead465abe4c3094f8e44bb5997118/FLAG727545981 [2025-03-08 14:57:18,284 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ee44376b/105ead465abe4c3094f8e44bb5997118 [2025-03-08 14:57:18,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 14:57:18,287 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 14:57:18,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 14:57:18,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 14:57:18,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 14:57:18,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf0269b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18, skipping insertion in model container [2025-03-08 14:57:18,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,302 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 14:57:18,404 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_50-while_file-59.i[915,928] [2025-03-08 14:57:18,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 14:57:18,457 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 14:57:18,463 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_50-while_file-59.i[915,928] [2025-03-08 14:57:18,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 14:57:18,495 INFO L204 MainTranslator]: Completed translation [2025-03-08 14:57:18,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18 WrapperNode [2025-03-08 14:57:18,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 14:57:18,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 14:57:18,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 14:57:18,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 14:57:18,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,534 INFO L138 Inliner]: procedures = 26, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 126 [2025-03-08 14:57:18,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 14:57:18,535 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 14:57:18,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 14:57:18,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 14:57:18,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,543 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,558 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 14:57:18,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,571 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,580 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 14:57:18,582 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 14:57:18,582 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 14:57:18,582 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 14:57:18,584 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (1/1) ... [2025-03-08 14:57:18,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 14:57:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 14:57:18,606 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 14:57:18,608 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 14:57:18,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 14:57:18,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 14:57:18,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 14:57:18,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 14:57:18,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 14:57:18,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 14:57:18,676 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 14:57:18,677 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 14:57:18,919 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2025-03-08 14:57:18,919 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 14:57:18,926 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 14:57:18,926 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 14:57:18,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 02:57:18 BoogieIcfgContainer [2025-03-08 14:57:18,927 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 14:57:18,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 14:57:18,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 14:57:18,932 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 14:57:18,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 02:57:18" (1/3) ... [2025-03-08 14:57:18,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac53c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 02:57:18, skipping insertion in model container [2025-03-08 14:57:18,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 02:57:18" (2/3) ... [2025-03-08 14:57:18,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac53c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 02:57:18, skipping insertion in model container [2025-03-08 14:57:18,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 02:57:18" (3/3) ... [2025-03-08 14:57:18,933 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_50-while_file-59.i [2025-03-08 14:57:18,943 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 14:57:18,945 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_loopvsstraightlinecode_50-while_file-59.i that has 2 procedures, 53 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 14:57:18,990 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 14:57:18,999 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;@b132b5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 14:57:19,000 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 14:57:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 37 states have internal predecessors, (50), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2025-03-08 14:57:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-03-08 14:57:19,011 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 14:57:19,011 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:19,012 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 14:57:19,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 14:57:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1154811841, now seen corresponding path program 1 times [2025-03-08 14:57:19,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 14:57:19,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120451130] [2025-03-08 14:57:19,023 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 14:57:19,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 14:57:19,084 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-03-08 14:57:19,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-03-08 14:57:19,158 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 14:57:19,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 14:57:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2025-03-08 14:57:19,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 14:57:19,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120451130] [2025-03-08 14:57:19,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120451130] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 14:57:19,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 14:57:19,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 14:57:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796527898] [2025-03-08 14:57:19,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 14:57:19,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 14:57:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 14:57:19,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 14:57:19,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 14:57:19,572 INFO L87 Difference]: Start difference. First operand has 53 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 37 states have internal predecessors, (50), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2025-03-08 14:57:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 14:57:19,705 INFO L93 Difference]: Finished difference Result 148 states and 254 transitions. [2025-03-08 14:57:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 14:57:19,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 95 [2025-03-08 14:57:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 14:57:19,713 INFO L225 Difference]: With dead ends: 148 [2025-03-08 14:57:19,713 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 14:57:19,717 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 14:57:19,720 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 51 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 14:57:19,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 203 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 14:57:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 14:57:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2025-03-08 14:57:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-03-08 14:57:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 115 transitions. [2025-03-08 14:57:19,761 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 115 transitions. Word has length 95 [2025-03-08 14:57:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 14:57:19,762 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 115 transitions. [2025-03-08 14:57:19,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2025-03-08 14:57:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 115 transitions. [2025-03-08 14:57:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-03-08 14:57:19,765 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 14:57:19,766 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:19,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 14:57:19,766 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 14:57:19,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 14:57:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -359031514, now seen corresponding path program 1 times [2025-03-08 14:57:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 14:57:19,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246945882] [2025-03-08 14:57:19,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 14:57:19,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 14:57:19,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-03-08 14:57:19,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-03-08 14:57:19,827 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 14:57:19,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 14:57:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2025-03-08 14:57:20,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 14:57:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246945882] [2025-03-08 14:57:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246945882] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 14:57:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 14:57:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 14:57:20,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169925182] [2025-03-08 14:57:20,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 14:57:20,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 14:57:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 14:57:20,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 14:57:20,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 14:57:20,034 INFO L87 Difference]: Start difference. First operand 79 states and 115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2025-03-08 14:57:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 14:57:20,160 INFO L93 Difference]: Finished difference Result 183 states and 267 transitions. [2025-03-08 14:57:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 14:57:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 96 [2025-03-08 14:57:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 14:57:20,163 INFO L225 Difference]: With dead ends: 183 [2025-03-08 14:57:20,163 INFO L226 Difference]: Without dead ends: 136 [2025-03-08 14:57:20,164 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 14:57:20,164 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 66 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 14:57:20,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 201 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 14:57:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-08 14:57:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2025-03-08 14:57:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 42 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-08 14:57:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2025-03-08 14:57:20,193 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 182 transitions. Word has length 96 [2025-03-08 14:57:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 14:57:20,194 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 182 transitions. [2025-03-08 14:57:20,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2025-03-08 14:57:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 182 transitions. [2025-03-08 14:57:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-08 14:57:20,195 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 14:57:20,199 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:20,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 14:57:20,200 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 14:57:20,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 14:57:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 228519135, now seen corresponding path program 1 times [2025-03-08 14:57:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 14:57:20,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374128740] [2025-03-08 14:57:20,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 14:57:20,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 14:57:20,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-08 14:57:20,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 14:57:20,333 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 14:57:20,333 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 14:57:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2025-03-08 14:57:20,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 14:57:20,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374128740] [2025-03-08 14:57:20,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374128740] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 14:57:20,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311957702] [2025-03-08 14:57:20,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 14:57:20,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 14:57:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 14:57:20,708 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 14:57:20,709 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 14:57:20,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-08 14:57:20,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 14:57:20,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 14:57:20,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 14:57:20,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 14:57:20,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 14:57:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 139 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2025-03-08 14:57:21,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 14:57:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2025-03-08 14:57:21,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311957702] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 14:57:21,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 14:57:21,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2025-03-08 14:57:21,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316012619] [2025-03-08 14:57:21,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 14:57:21,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 14:57:21,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 14:57:21,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 14:57:21,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-03-08 14:57:21,756 INFO L87 Difference]: Start difference. First operand 124 states and 182 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 6 states have call successors, (42), 3 states have call predecessors, (42), 6 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2025-03-08 14:57:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 14:57:22,710 INFO L93 Difference]: Finished difference Result 299 states and 429 transitions. [2025-03-08 14:57:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 14:57:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 6 states have call successors, (42), 3 states have call predecessors, (42), 6 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) Word has length 97 [2025-03-08 14:57:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 14:57:22,713 INFO L225 Difference]: With dead ends: 299 [2025-03-08 14:57:22,713 INFO L226 Difference]: Without dead ends: 207 [2025-03-08 14:57:22,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=1281, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 14:57:22,715 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 363 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 14:57:22,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 430 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 14:57:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2025-03-08 14:57:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 169. [2025-03-08 14:57:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 116 states have internal predecessors, (142), 48 states have call successors, (48), 6 states have call predecessors, (48), 6 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2025-03-08 14:57:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 238 transitions. [2025-03-08 14:57:22,749 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 238 transitions. Word has length 97 [2025-03-08 14:57:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 14:57:22,749 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 238 transitions. [2025-03-08 14:57:22,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 6 states have call successors, (42), 3 states have call predecessors, (42), 6 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2025-03-08 14:57:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 238 transitions. [2025-03-08 14:57:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-08 14:57:22,750 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 14:57:22,750 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:57:22,758 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 14:57:22,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 14:57:22,956 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 14:57:22,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 14:57:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 521922142, now seen corresponding path program 1 times [2025-03-08 14:57:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 14:57:22,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778657257] [2025-03-08 14:57:22,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 14:57:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 14:57:22,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-08 14:57:23,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 14:57:23,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 14:57:23,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 14:57:23,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327055020] [2025-03-08 14:57:23,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 14:57:23,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 14:57:23,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 14:57:23,059 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 14:57:23,062 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 14:57:23,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-08 14:57:23,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-08 14:57:23,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 14:57:23,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 14:57:23,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 14:57:23,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 14:57:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 169 proven. 105 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-03-08 14:57:24,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 14:58:00,772 WARN L286 SmtUtils]: Spent 15.23s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-08 14:58:20,554 WARN L286 SmtUtils]: Spent 9.32s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-08 14:58:35,086 WARN L286 SmtUtils]: Spent 11.03s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-03-08 14:58:57,510 WARN L286 SmtUtils]: Spent 16.79s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)