./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/array_3-2.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 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 13:29:33,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 13:29:33,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 13:29:33,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 13:29:33,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 13:29:33,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 13:29:33,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 13:29:33,376 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 13:29:33,377 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 13:29:33,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 13:29:33,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 13:29:33,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 13:29:33,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 13:29:33,378 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:29:33,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 13:29:33,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 13:29:33,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 13:29:33,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 13:29:33,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 13:29:33,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 13:29:33,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 13:29:33,379 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 -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2025-03-03 13:29:33,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 13:29:33,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 13:29:33,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 13:29:33,600 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 13:29:33,601 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 13:29:33,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-2.i [2025-03-03 13:29:34,708 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd93e2c2d/ab71a373c9894bb3a173b8686d88ff1a/FLAG9f7a2b236 [2025-03-03 13:29:34,906 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 13:29:34,907 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-2.i [2025-03-03 13:29:34,915 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd93e2c2d/ab71a373c9894bb3a173b8686d88ff1a/FLAG9f7a2b236 [2025-03-03 13:29:34,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd93e2c2d/ab71a373c9894bb3a173b8686d88ff1a [2025-03-03 13:29:34,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 13:29:34,934 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 13:29:34,934 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 13:29:34,935 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 13:29:34,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 13:29:34,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:29:34" (1/1) ... [2025-03-03 13:29:34,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab977d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:34, skipping insertion in model container [2025-03-03 13:29:34,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 01:29:34" (1/1) ... [2025-03-03 13:29:34,950 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 13:29:35,042 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/loop-acceleration/array_3-2.i[809,822] [2025-03-03 13:29:35,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:29:35,060 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 13:29:35,067 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/loop-acceleration/array_3-2.i[809,822] [2025-03-03 13:29:35,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 13:29:35,084 INFO L204 MainTranslator]: Completed translation [2025-03-03 13:29:35,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35 WrapperNode [2025-03-03 13:29:35,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 13:29:35,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 13:29:35,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 13:29:35,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 13:29:35,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,107 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2025-03-03 13:29:35,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 13:29:35,109 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 13:29:35,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 13:29:35,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 13:29:35,114 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,115 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,127 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-03 13:29:35,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,131 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 13:29:35,137 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 13:29:35,137 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 13:29:35,137 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 13:29:35,138 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (1/1) ... [2025-03-03 13:29:35,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 13:29:35,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:35,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 13:29:35,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 13:29:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 13:29:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 13:29:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 13:29:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 13:29:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 13:29:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 13:29:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 13:29:35,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 13:29:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 13:29:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 13:29:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 13:29:35,230 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 13:29:35,232 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 13:29:35,317 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-03-03 13:29:35,318 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 13:29:35,323 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 13:29:35,323 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 13:29:35,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:29:35 BoogieIcfgContainer [2025-03-03 13:29:35,324 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 13:29:35,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 13:29:35,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 13:29:35,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 13:29:35,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 01:29:34" (1/3) ... [2025-03-03 13:29:35,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29010416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:29:35, skipping insertion in model container [2025-03-03 13:29:35,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 01:29:35" (2/3) ... [2025-03-03 13:29:35,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29010416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 01:29:35, skipping insertion in model container [2025-03-03 13:29:35,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 01:29:35" (3/3) ... [2025-03-03 13:29:35,330 INFO L128 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2025-03-03 13:29:35,340 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 13:29:35,341 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array_3-2.i that has 1 procedures, 14 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 13:29:35,378 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 13:29:35,387 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;@e4cea05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 13:29:35,388 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 13:29:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-03 13:29:35,394 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:35,394 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:35,395 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:35,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1956065895, now seen corresponding path program 1 times [2025-03-03 13:29:35,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:35,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96036952] [2025-03-03 13:29:35,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:29:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:35,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-03 13:29:35,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-03 13:29:35,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:29:35,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:29:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96036952] [2025-03-03 13:29:35,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96036952] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:29:35,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:29:35,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 13:29:35,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270527769] [2025-03-03 13:29:35,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:29:35,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 13:29:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:35,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 13:29:35,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 13:29:35,570 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:35,606 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2025-03-03 13:29:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 13:29:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-03 13:29:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:35,611 INFO L225 Difference]: With dead ends: 30 [2025-03-03 13:29:35,612 INFO L226 Difference]: Without dead ends: 15 [2025-03-03 13:29:35,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 13:29:35,615 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:35,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:29:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-03 13:29:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2025-03-03 13:29:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-03-03 13:29:35,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2025-03-03 13:29:35,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:35,639 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-03-03 13:29:35,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-03-03 13:29:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 13:29:35,640 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:35,640 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:35,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 13:29:35,641 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:35,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1880174169, now seen corresponding path program 1 times [2025-03-03 13:29:35,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:35,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171348032] [2025-03-03 13:29:35,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:29:35,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:35,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:29:35,668 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:29:35,668 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:29:35,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:29:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171348032] [2025-03-03 13:29:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171348032] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:29:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915043190] [2025-03-03 13:29:35,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:29:35,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:35,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:29:35,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 13:29:35,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 13:29:35,790 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 13:29:35,790 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:29:35,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:35,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 13:29:35,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:29:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:29:35,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:29:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 13:29:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915043190] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:29:35,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:29:35,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-03 13:29:35,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295881332] [2025-03-03 13:29:35,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:29:35,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 13:29:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:35,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 13:29:35,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:29:35,844 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:35,890 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2025-03-03 13:29:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 13:29:35,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-03-03 13:29:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:35,891 INFO L225 Difference]: With dead ends: 37 [2025-03-03 13:29:35,891 INFO L226 Difference]: Without dead ends: 30 [2025-03-03 13:29:35,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-03 13:29:35,892 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:35,892 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:29:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-03 13:29:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 14. [2025-03-03 13:29:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2025-03-03 13:29:35,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2025-03-03 13:29:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:35,896 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2025-03-03 13:29:35,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2025-03-03 13:29:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-03 13:29:35,896 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:35,896 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:35,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 13:29:36,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:36,097 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:36,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:36,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1637478154, now seen corresponding path program 2 times [2025-03-03 13:29:36,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:36,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005228810] [2025-03-03 13:29:36,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:29:36,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:36,110 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-03 13:29:36,120 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 9 of 13 statements. [2025-03-03 13:29:36,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-03 13:29:36,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 13:29:36,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:36,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005228810] [2025-03-03 13:29:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005228810] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 13:29:36,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 13:29:36,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 13:29:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861670758] [2025-03-03 13:29:36,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 13:29:36,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 13:29:36,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:36,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 13:29:36,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:29:36,191 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:36,211 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2025-03-03 13:29:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 13:29:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2025-03-03 13:29:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:36,212 INFO L225 Difference]: With dead ends: 21 [2025-03-03 13:29:36,212 INFO L226 Difference]: Without dead ends: 17 [2025-03-03 13:29:36,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 13:29:36,213 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:36,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 13:29:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-03-03 13:29:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-03-03 13:29:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2025-03-03 13:29:36,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2025-03-03 13:29:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:36,217 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2025-03-03 13:29:36,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2025-03-03 13:29:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 13:29:36,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:36,218 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:36,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 13:29:36,219 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:36,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 967695863, now seen corresponding path program 1 times [2025-03-03 13:29:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:36,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314452710] [2025-03-03 13:29:36,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:29:36,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:36,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:29:36,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:29:36,245 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:29:36,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 13:29:36,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:36,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314452710] [2025-03-03 13:29:36,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314452710] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:29:36,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072162643] [2025-03-03 13:29:36,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 13:29:36,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:36,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:36,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:29:36,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 13:29:36,408 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 13:29:36,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 13:29:36,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 13:29:36,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:36,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 13:29:36,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:29:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:29:36,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:29:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-03 13:29:36,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072162643] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:29:36,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:29:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2025-03-03 13:29:36,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121298761] [2025-03-03 13:29:36,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:29:36,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 13:29:36,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:36,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 13:29:36,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:29:36,511 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:36,579 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2025-03-03 13:29:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 13:29:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-03-03 13:29:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:36,580 INFO L225 Difference]: With dead ends: 70 [2025-03-03 13:29:36,580 INFO L226 Difference]: Without dead ends: 55 [2025-03-03 13:29:36,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2025-03-03 13:29:36,581 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:36,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 48 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:29:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-03 13:29:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2025-03-03 13:29:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-03 13:29:36,585 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 16 [2025-03-03 13:29:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:36,585 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-03 13:29:36,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-03 13:29:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-03 13:29:36,585 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:36,585 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:36,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 13:29:36,789 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 [2025-03-03 13:29:36,789 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:36,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:36,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1616007831, now seen corresponding path program 2 times [2025-03-03 13:29:36,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185934986] [2025-03-03 13:29:36,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:29:36,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:36,802 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-03 13:29:36,820 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:29:36,822 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:29:36,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:29:37,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:37,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185934986] [2025-03-03 13:29:37,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185934986] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:29:37,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997988422] [2025-03-03 13:29:37,048 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 13:29:37,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:37,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:37,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:29:37,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 13:29:37,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-03 13:29:37,137 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-03 13:29:37,137 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 13:29:37,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:37,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 13:29:37,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:29:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:29:37,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:29:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-03 13:29:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997988422] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:29:37,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:29:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-03 13:29:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516481967] [2025-03-03 13:29:37,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:29:37,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 13:29:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:37,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 13:29:37,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:29:37,357 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:37,489 INFO L93 Difference]: Finished difference Result 137 states and 196 transitions. [2025-03-03 13:29:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 13:29:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2025-03-03 13:29:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:37,491 INFO L225 Difference]: With dead ends: 137 [2025-03-03 13:29:37,491 INFO L226 Difference]: Without dead ends: 115 [2025-03-03 13:29:37,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-03 13:29:37,492 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 222 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:37,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 61 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:29:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-03 13:29:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 47. [2025-03-03 13:29:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2025-03-03 13:29:37,498 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 34 [2025-03-03 13:29:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:37,498 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2025-03-03 13:29:37,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2025-03-03 13:29:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-03 13:29:37,499 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:37,499 INFO L218 NwaCegarLoop]: trace histogram [22, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:37,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 13:29:37,699 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 [2025-03-03 13:29:37,700 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:37,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1934182569, now seen corresponding path program 3 times [2025-03-03 13:29:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:37,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010719495] [2025-03-03 13:29:37,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:29:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:37,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 12 equivalence classes. [2025-03-03 13:29:37,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 34 of 46 statements. [2025-03-03 13:29:37,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:29:37,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-03 13:29:37,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010719495] [2025-03-03 13:29:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010719495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:29:37,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272081873] [2025-03-03 13:29:37,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 13:29:37,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:37,896 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:29:37,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 13:29:37,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 12 equivalence classes. [2025-03-03 13:29:37,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 34 of 46 statements. [2025-03-03 13:29:37,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 13:29:37,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:37,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 13:29:38,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:29:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-03 13:29:38,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:29:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-03 13:29:38,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272081873] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:29:38,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:29:38,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-03 13:29:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370497852] [2025-03-03 13:29:38,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:29:38,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 13:29:38,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:38,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 13:29:38,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:29:38,145 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:38,224 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2025-03-03 13:29:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 13:29:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2025-03-03 13:29:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:38,225 INFO L225 Difference]: With dead ends: 78 [2025-03-03 13:29:38,225 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 13:29:38,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2025-03-03 13:29:38,226 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:38,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 47 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 13:29:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 13:29:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-03-03 13:29:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2025-03-03 13:29:38,234 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 46 [2025-03-03 13:29:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:38,234 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2025-03-03 13:29:38,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2025-03-03 13:29:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-03 13:29:38,235 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:38,235 INFO L218 NwaCegarLoop]: trace histogram [22, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 13:29:38,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:38,435 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:38,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1476545238, now seen corresponding path program 4 times [2025-03-03 13:29:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:38,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675290233] [2025-03-03 13:29:38,436 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:29:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:38,457 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 67 statements into 2 equivalence classes. [2025-03-03 13:29:38,474 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 13:29:38,476 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:29:38,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2025-03-03 13:29:39,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675290233] [2025-03-03 13:29:39,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675290233] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:29:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881213750] [2025-03-03 13:29:39,013 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 13:29:39,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:39,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:29:39,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 13:29:39,073 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 67 statements into 2 equivalence classes. [2025-03-03 13:29:39,104 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 67 of 67 statements. [2025-03-03 13:29:39,104 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-03 13:29:39,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:39,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 13:29:39,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:29:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2025-03-03 13:29:39,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:29:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2025-03-03 13:29:39,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881213750] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:29:39,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:29:39,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-03-03 13:29:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183345577] [2025-03-03 13:29:39,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:29:39,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 13:29:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:29:39,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 13:29:39,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:29:39,772 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:29:40,118 INFO L93 Difference]: Finished difference Result 271 states and 390 transitions. [2025-03-03 13:29:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-03 13:29:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2025-03-03 13:29:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:29:40,120 INFO L225 Difference]: With dead ends: 271 [2025-03-03 13:29:40,120 INFO L226 Difference]: Without dead ends: 228 [2025-03-03 13:29:40,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 13:29:40,122 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 646 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 13:29:40,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 97 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 13:29:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-03-03 13:29:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 92. [2025-03-03 13:29:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.164835164835165) internal successors, (106), 91 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2025-03-03 13:29:40,141 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 67 [2025-03-03 13:29:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:29:40,141 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2025-03-03 13:29:40,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:29:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2025-03-03 13:29:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-03 13:29:40,142 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:29:40,142 INFO L218 NwaCegarLoop]: trace histogram [46, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:29:40,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 13:29:40,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:40,343 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:29:40,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:29:40,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1268857770, now seen corresponding path program 5 times [2025-03-03 13:29:40,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:29:40,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549903901] [2025-03-03 13:29:40,343 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:29:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:29:40,371 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 91 statements into 24 equivalence classes. [2025-03-03 13:29:40,535 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 13:29:40,535 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-03 13:29:40,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:29:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2025-03-03 13:29:41,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:29:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549903901] [2025-03-03 13:29:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549903901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:29:41,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386612121] [2025-03-03 13:29:41,938 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 13:29:41,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:29:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:29:41,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:29:41,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 13:29:42,018 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 91 statements into 24 equivalence classes. [2025-03-03 13:30:05,988 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 13:30:05,988 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-03 13:30:05,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:30:06,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-03 13:30:06,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 13:30:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2025-03-03 13:30:06,093 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 13:30:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2025-03-03 13:30:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386612121] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 13:30:08,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 13:30:08,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2025-03-03 13:30:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970760205] [2025-03-03 13:30:08,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 13:30:08,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-03 13:30:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 13:30:08,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-03 13:30:08,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-03 13:30:08,054 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:30:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 13:30:09,318 INFO L93 Difference]: Finished difference Result 511 states and 750 transitions. [2025-03-03 13:30:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-03 13:30:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2025-03-03 13:30:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 13:30:09,320 INFO L225 Difference]: With dead ends: 511 [2025-03-03 13:30:09,320 INFO L226 Difference]: Without dead ends: 468 [2025-03-03 13:30:09,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-03 13:30:09,322 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 1312 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 13:30:09,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 210 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 13:30:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2025-03-03 13:30:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 140. [2025-03-03 13:30:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1079136690647482) internal successors, (154), 139 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:30:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2025-03-03 13:30:09,334 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 91 [2025-03-03 13:30:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 13:30:09,334 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2025-03-03 13:30:09,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 13:30:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2025-03-03 13:30:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2025-03-03 13:30:09,335 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 13:30:09,336 INFO L218 NwaCegarLoop]: trace histogram [94, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 13:30:09,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 13:30:09,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:30:09,536 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 13:30:09,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 13:30:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash -742012758, now seen corresponding path program 6 times [2025-03-03 13:30:09,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 13:30:09,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919096839] [2025-03-03 13:30:09,537 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:30:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 13:30:09,571 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 139 statements into 48 equivalence classes. [2025-03-03 13:30:09,683 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) and asserted 93 of 139 statements. [2025-03-03 13:30:09,683 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2025-03-03 13:30:09,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 13:30:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2025-03-03 13:30:09,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 13:30:09,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919096839] [2025-03-03 13:30:09,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919096839] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 13:30:09,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812060468] [2025-03-03 13:30:09,971 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 13:30:09,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 13:30:09,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 13:30:09,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 13:30:09,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 13:30:10,084 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 139 statements into 48 equivalence classes.