./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/ifeqn4.c -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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:55:04,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:55:04,541 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:55:04,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:55:04,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:55:04,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:55:04,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:55:04,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:55:04,562 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:55:04,562 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:55:04,562 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:55:04,562 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:55:04,563 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:55:04,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:55:04,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:55:04,564 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:55:04,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:55:04,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:55:04,565 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:55:04,565 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 -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2025-03-16 13:55:04,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:55:04,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:55:04,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:55:04,781 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:55:04,782 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:55:04,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4.c [2025-03-16 13:55:05,923 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddb94145/9e07f7175c00451ba0fdb0e2da50bc0c/FLAGe98d436b4 [2025-03-16 13:55:06,123 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:55:06,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4.c [2025-03-16 13:55:06,132 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddb94145/9e07f7175c00451ba0fdb0e2da50bc0c/FLAGe98d436b4 [2025-03-16 13:55:06,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddb94145/9e07f7175c00451ba0fdb0e2da50bc0c [2025-03-16 13:55:06,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:55:06,149 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:55:06,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:55:06,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:55:06,153 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:55:06,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,154 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e8e9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06, skipping insertion in model container [2025-03-16 13:55:06,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,164 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:55:06,261 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/array-fpi/ifeqn4.c[589,602] [2025-03-16 13:55:06,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:55:06,280 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:55:06,286 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/array-fpi/ifeqn4.c[589,602] [2025-03-16 13:55:06,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:55:06,303 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:55:06,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06 WrapperNode [2025-03-16 13:55:06,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:55:06,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:55:06,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:55:06,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:55:06,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,328 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2025-03-16 13:55:06,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:55:06,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:55:06,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:55:06,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:55:06,335 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,349 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-03-16 13:55:06,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,354 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,355 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:55:06,357 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:55:06,357 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:55:06,357 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:55:06,358 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (1/1) ... [2025-03-16 13:55:06,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:55:06,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:55:06,381 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) [2025-03-16 13:55:06,385 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 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-16 13:55:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:55:06,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:55:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:55:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:55:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-16 13:55:06,449 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:55:06,450 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:55:06,560 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 13:55:06,560 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:55:06,565 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:55:06,565 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:55:06,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:55:06 BoogieIcfgContainer [2025-03-16 13:55:06,566 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:55:06,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:55:06,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:55:06,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:55:06,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:55:06" (1/3) ... [2025-03-16 13:55:06,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7c8997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:55:06, skipping insertion in model container [2025-03-16 13:55:06,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:55:06" (2/3) ... [2025-03-16 13:55:06,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7c8997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:55:06, skipping insertion in model container [2025-03-16 13:55:06,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:55:06" (3/3) ... [2025-03-16 13:55:06,572 INFO L128 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2025-03-16 13:55:06,580 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:55:06,581 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ifeqn4.c that has 1 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:55:06,618 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:55:06,628 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;@8703708, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:55:06,628 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:55:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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) [2025-03-16 13:55:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:55:06,635 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:55:06,635 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:55:06,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:55:06,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:55:06,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1737615597, now seen corresponding path program 1 times [2025-03-16 13:55:06,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:55:06,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881076048] [2025-03-16 13:55:06,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:55:06,694 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:55:06,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:55:06,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:06,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:55:06,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:55:06,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881076048] [2025-03-16 13:55:06,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881076048] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:55:06,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:55:06,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:55:06,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325810476] [2025-03-16 13:55:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:55:06,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 13:55:06,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:55:06,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 13:55:06,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:55:06,770 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2025-03-16 13:55:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:55:06,778 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2025-03-16 13:55:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 13:55:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2025-03-16 13:55:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:55:06,784 INFO L225 Difference]: With dead ends: 33 [2025-03-16 13:55:06,784 INFO L226 Difference]: Without dead ends: 15 [2025-03-16 13:55:06,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 13:55:06,787 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:55:06,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:55:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-03-16 13:55:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-03-16 13:55:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2025-03-16 13:55:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2025-03-16 13:55:06,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2025-03-16 13:55:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:55:06,813 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2025-03-16 13:55:06,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2025-03-16 13:55:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2025-03-16 13:55:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 13:55:06,814 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:55:06,814 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:55:06,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:55:06,814 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:55:06,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:55:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1669848018, now seen corresponding path program 1 times [2025-03-16 13:55:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:55:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467728226] [2025-03-16 13:55:06,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:06,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:55:06,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 13:55:06,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 13:55:06,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:06,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:55:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:55:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467728226] [2025-03-16 13:55:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467728226] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:55:06,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:55:06,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 13:55:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315583803] [2025-03-16 13:55:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:55:06,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 13:55:06,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:55:06,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 13:55:06,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:55:06,967 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-03-16 13:55:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:55:07,010 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2025-03-16 13:55:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 13:55:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2025-03-16 13:55:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:55:07,011 INFO L225 Difference]: With dead ends: 37 [2025-03-16 13:55:07,011 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:55:07,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-16 13:55:07,013 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:55:07,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:55:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:55:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2025-03-16 13:55:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2025-03-16 13:55:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-03-16 13:55:07,016 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2025-03-16 13:55:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:55:07,016 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-03-16 13:55:07,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-03-16 13:55:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-03-16 13:55:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 13:55:07,017 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:55:07,017 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:55:07,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:55:07,018 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:55:07,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:55:07,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1295083151, now seen corresponding path program 1 times [2025-03-16 13:55:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:55:07,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921517827] [2025-03-16 13:55:07,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:07,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:55:07,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 13:55:07,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 13:55:07,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:07,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:55:07,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924886131] [2025-03-16 13:55:07,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:07,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:55:07,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:55:07,057 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) [2025-03-16 13:55:07,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:55:07,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-16 13:55:07,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 13:55:07,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:07,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:07,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 13:55:07,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:55:07,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:55:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:55:07,211 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 13:55:07,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:55:07,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921517827] [2025-03-16 13:55:07,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:55:07,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924886131] [2025-03-16 13:55:07,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924886131] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:55:07,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:55:07,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 13:55:07,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712373581] [2025-03-16 13:55:07,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:55:07,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 13:55:07,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:55:07,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 13:55:07,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 13:55:07,215 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2025-03-16 13:55:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:55:07,269 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2025-03-16 13:55:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 13:55:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 15 [2025-03-16 13:55:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:55:07,270 INFO L225 Difference]: With dead ends: 32 [2025-03-16 13:55:07,270 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 13:55:07,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-16 13:55:07,271 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:55:07,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:55:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 13:55:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2025-03-16 13:55:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2025-03-16 13:55:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2025-03-16 13:55:07,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2025-03-16 13:55:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:55:07,276 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2025-03-16 13:55:07,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2025-03-16 13:55:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2025-03-16 13:55:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 13:55:07,276 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:55:07,276 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:55:07,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:55:07,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:55:07,477 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:55:07,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:55:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash 131803291, now seen corresponding path program 1 times [2025-03-16 13:55:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:55:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81080388] [2025-03-16 13:55:07,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:55:07,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:55:07,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:55:07,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:07,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:55:07,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:55:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81080388] [2025-03-16 13:55:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81080388] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:55:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504834131] [2025-03-16 13:55:07,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:07,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:55:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:55:07,668 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) [2025-03-16 13:55:07,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:55:07,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 13:55:07,719 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 13:55:07,719 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:07,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:07,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-16 13:55:07,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:55:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:55:07,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:55:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:55:07,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504834131] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:55:07,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:55:07,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2025-03-16 13:55:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732276383] [2025-03-16 13:55:07,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:55:07,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-16 13:55:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:55:07,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-16 13:55:07,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-16 13:55:07,827 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2025-03-16 13:55:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:55:07,914 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2025-03-16 13:55:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 13:55:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 18 [2025-03-16 13:55:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:55:07,915 INFO L225 Difference]: With dead ends: 57 [2025-03-16 13:55:07,915 INFO L226 Difference]: Without dead ends: 37 [2025-03-16 13:55:07,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2025-03-16 13:55:07,915 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:55:07,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:55:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-03-16 13:55:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2025-03-16 13:55:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2025-03-16 13:55:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2025-03-16 13:55:07,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2025-03-16 13:55:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:55:07,918 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2025-03-16 13:55:07,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2025-03-16 13:55:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2025-03-16 13:55:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-03-16 13:55:07,919 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:55:07,919 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:55:07,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 13:55:08,119 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 [2025-03-16 13:55:08,119 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:55:08,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:55:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash -902199314, now seen corresponding path program 1 times [2025-03-16 13:55:08,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:55:08,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393334477] [2025-03-16 13:55:08,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:55:08,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-16 13:55:08,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:55:08,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:08,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:55:08,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194020580] [2025-03-16 13:55:08,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:08,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:55:08,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:55:08,185 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) [2025-03-16 13:55:08,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:55:08,218 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-16 13:55:08,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-16 13:55:08,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:08,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:08,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 13:55:08,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:55:08,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:55:08,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-16 13:55:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:55:08,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:55:08,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2025-03-16 13:55:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:55:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:55:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393334477] [2025-03-16 13:55:08,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:55:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194020580] [2025-03-16 13:55:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194020580] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:55:08,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:55:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2025-03-16 13:55:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711534421] [2025-03-16 13:55:08,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:55:08,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-16 13:55:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:55:08,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-16 13:55:08,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-16 13:55:08,530 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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) [2025-03-16 13:55:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:55:08,778 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2025-03-16 13:55:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 13:55:08,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 21 [2025-03-16 13:55:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:55:08,780 INFO L225 Difference]: With dead ends: 93 [2025-03-16 13:55:08,781 INFO L226 Difference]: Without dead ends: 76 [2025-03-16 13:55:08,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-03-16 13:55:08,782 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:55:08,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 63 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:55:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-03-16 13:55:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 35. [2025-03-16 13:55:08,786 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) [2025-03-16 13:55:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2025-03-16 13:55:08,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 21 [2025-03-16 13:55:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:55:08,787 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2025-03-16 13:55:08,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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) [2025-03-16 13:55:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2025-03-16 13:55:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 13:55:08,788 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:55:08,788 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:55:08,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 13:55:08,992 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 [2025-03-16 13:55:08,992 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:55:08,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:55:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 486446812, now seen corresponding path program 1 times [2025-03-16 13:55:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:55:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761596029] [2025-03-16 13:55:08,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:55:08,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:55:09,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:55:09,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:09,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:55:09,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909213937] [2025-03-16 13:55:09,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:55:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:55:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:55:09,039 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) [2025-03-16 13:55:09,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:55:09,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 13:55:09,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 13:55:09,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:55:09,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:55:09,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-16 13:55:09,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:55:09,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:55:09,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-16 13:55:09,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:55:09,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-16 13:55:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:55:09,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:55:09,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2025-03-16 13:55:09,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:55:09,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 73 [2025-03-16 13:55:09,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2025-03-16 13:55:09,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2025-03-16 13:55:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:55:10,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:55:10,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761596029] [2025-03-16 13:55:10,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:55:10,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909213937] [2025-03-16 13:55:10,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909213937] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:55:10,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:55:10,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2025-03-16 13:55:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232047049] [2025-03-16 13:55:10,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:55:10,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-16 13:55:10,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:55:10,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-16 13:55:10,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2025-03-16 13:55:10,034 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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) [2025-03-16 13:55:14,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:55:18,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:55:22,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:55:26,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:55:30,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:55:43,259 WARN L286 SmtUtils]: Spent 12.06s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-03-16 13:55:47,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2025-03-16 13:55:52,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:55:56,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:00,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:04,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:08,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:12,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:16,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:21,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:25,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-16 13:56:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:56:27,946 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2025-03-16 13:56:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-16 13:56:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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 24 [2025-03-16 13:56:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:56:27,948 INFO L225 Difference]: With dead ends: 202 [2025-03-16 13:56:27,948 INFO L226 Difference]: Without dead ends: 200 [2025-03-16 13:56:27,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=687, Invalid=2393, Unknown=0, NotChecked=0, Total=3080 [2025-03-16 13:56:27,950 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 482 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 112 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.8s IncrementalHoareTripleChecker+Time [2025-03-16 13:56:27,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 151 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 452 Invalid, 15 Unknown, 0 Unchecked, 61.8s Time] [2025-03-16 13:56:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-03-16 13:56:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 87. [2025-03-16 13:56:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.313953488372093) internal successors, (113), 86 states have internal predecessors, (113), 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) [2025-03-16 13:56:27,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2025-03-16 13:56:27,976 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 24 [2025-03-16 13:56:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:56:27,976 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2025-03-16 13:56:27,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 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) [2025-03-16 13:56:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2025-03-16 13:56:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 13:56:27,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:56:27,977 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:56:27,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:56:28,177 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 [2025-03-16 13:56:28,178 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:56:28,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:56:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash 518191406, now seen corresponding path program 2 times [2025-03-16 13:56:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:56:28,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574804776] [2025-03-16 13:56:28,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:56:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:56:28,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-16 13:56:28,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:56:28,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:56:28,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:56:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:56:28,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:56:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574804776] [2025-03-16 13:56:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574804776] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:56:28,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733177490] [2025-03-16 13:56:28,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:56:28,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:56:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:56:28,336 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) [2025-03-16 13:56:28,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:56:28,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-16 13:56:28,386 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 13:56:28,386 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:56:28,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:56:28,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:56:28,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:56:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:56:28,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:56:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:56:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733177490] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:56:28,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:56:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-16 13:56:28,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880900894] [2025-03-16 13:56:28,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:56:28,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:56:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:56:28,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:56:28,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:56:28,526 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2025-03-16 13:56:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:56:28,670 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2025-03-16 13:56:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:56:28,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 27 [2025-03-16 13:56:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:56:28,672 INFO L225 Difference]: With dead ends: 170 [2025-03-16 13:56:28,672 INFO L226 Difference]: Without dead ends: 111 [2025-03-16 13:56:28,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2025-03-16 13:56:28,673 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:56:28,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 55 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:56:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-16 13:56:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2025-03-16 13:56:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 91 states have internal predecessors, (114), 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) [2025-03-16 13:56:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2025-03-16 13:56:28,685 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 27 [2025-03-16 13:56:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:56:28,685 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2025-03-16 13:56:28,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2025-03-16 13:56:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2025-03-16 13:56:28,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:56:28,685 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:56:28,686 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:56:28,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 13:56:28,886 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 [2025-03-16 13:56:28,886 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:56:28,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:56:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1291461938, now seen corresponding path program 3 times [2025-03-16 13:56:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:56:28,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555240586] [2025-03-16 13:56:28,887 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:56:28,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:56:28,893 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 6 equivalence classes. [2025-03-16 13:56:28,965 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 33 statements. [2025-03-16 13:56:28,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:56:28,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:56:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:56:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:56:29,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555240586] [2025-03-16 13:56:29,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555240586] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:56:29,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515058059] [2025-03-16 13:56:29,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:56:29,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:56:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:56:29,147 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) [2025-03-16 13:56:29,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:56:29,182 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 6 equivalence classes. [2025-03-16 13:56:29,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 27 of 33 statements. [2025-03-16 13:56:29,235 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 13:56:29,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:56:29,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 13:56:29,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:56:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:56:29,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:56:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-16 13:56:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515058059] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:56:29,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:56:29,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2025-03-16 13:56:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962041386] [2025-03-16 13:56:29,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:56:29,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 13:56:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:56:29,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 13:56:29,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2025-03-16 13:56:29,482 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2025-03-16 13:56:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:56:29,892 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2025-03-16 13:56:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 13:56:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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 33 [2025-03-16 13:56:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:56:29,893 INFO L225 Difference]: With dead ends: 143 [2025-03-16 13:56:29,893 INFO L226 Difference]: Without dead ends: 136 [2025-03-16 13:56:29,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2025-03-16 13:56:29,894 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:56:29,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 73 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:56:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-16 13:56:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2025-03-16 13:56:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 96 states have internal predecessors, (119), 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) [2025-03-16 13:56:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2025-03-16 13:56:29,905 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 33 [2025-03-16 13:56:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:56:29,906 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2025-03-16 13:56:29,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 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) [2025-03-16 13:56:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2025-03-16 13:56:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-16 13:56:29,906 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:56:29,906 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:56:29,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 13:56:30,107 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 [2025-03-16 13:56:30,107 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:56:30,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:56:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 894642735, now seen corresponding path program 4 times [2025-03-16 13:56:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:56:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900404959] [2025-03-16 13:56:30,107 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:56:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:56:30,114 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-16 13:56:30,158 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:56:30,159 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:56:30,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 13:56:30,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733146797] [2025-03-16 13:56:30,161 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:56:30,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:56:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:56:30,163 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) [2025-03-16 13:56:30,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:56:30,201 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-03-16 13:56:30,302 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-03-16 13:56:30,303 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:56:30,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:56:30,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-16 13:56:30,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:56:30,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:56:30,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-16 13:56:30,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:56:30,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-16 13:56:30,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-16 13:56:30,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-16 13:56:30,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:56:30,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2025-03-16 13:56:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:56:30,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:56:31,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2025-03-16 13:56:31,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-16 13:56:31,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 548 treesize of output 502 [2025-03-16 13:56:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:56:32,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:56:32,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900404959] [2025-03-16 13:56:32,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 13:56:32,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733146797] [2025-03-16 13:56:32,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733146797] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:56:32,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 13:56:32,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2025-03-16 13:56:32,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163054297] [2025-03-16 13:56:32,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 13:56:32,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 13:56:32,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:56:32,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 13:56:32,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 13:56:32,313 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 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)