./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array29_pattern.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 c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:29:50,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:29:50,528 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:29:50,531 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:29:50,532 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:29:50,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:29:50,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:29:50,545 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:29:50,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:29:50,546 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:29:50,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:29:50,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:29:50,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:29:50,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:29:50,547 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:29:50,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:29:50,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:29:50,547 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:29:50,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:29:50,548 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:29:50,548 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:29:50,549 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:29:50,549 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:29:50,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:29:50,550 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:29:50,550 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 -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2025-03-03 09:29:50,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:29:50,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:29:50,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:29:50,749 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:29:50,749 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:29:50,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2025-03-03 09:29:51,859 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/880561b0b/64ef6dba6d144c4782c29a54ec94da74/FLAGb9302df2a [2025-03-03 09:29:52,066 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:29:52,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2025-03-03 09:29:52,075 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/880561b0b/64ef6dba6d144c4782c29a54ec94da74/FLAGb9302df2a [2025-03-03 09:29:52,428 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/880561b0b/64ef6dba6d144c4782c29a54ec94da74 [2025-03-03 09:29:52,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:29:52,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:29:52,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:29:52,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:29:52,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:29:52,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee0cb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52, skipping insertion in model container [2025-03-03 09:29:52,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,456 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:29:52,561 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-patterns/array29_pattern.c[1255,1268] [2025-03-03 09:29:52,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:29:52,581 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:29:52,589 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-patterns/array29_pattern.c[1255,1268] [2025-03-03 09:29:52,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:29:52,610 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:29:52,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52 WrapperNode [2025-03-03 09:29:52,612 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:29:52,613 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:29:52,614 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:29:52,614 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:29:52,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,634 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2025-03-03 09:29:52,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:29:52,635 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:29:52,635 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:29:52,635 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:29:52,641 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,647 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,657 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-03 09:29:52,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,662 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,666 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,667 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:29:52,668 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:29:52,668 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:29:52,668 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:29:52,672 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (1/1) ... [2025-03-03 09:29:52,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:29:52,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:29:52,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 09:29:52,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 09:29:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:29:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:29:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-03 09:29:52,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-03 09:29:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-03 09:29:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-03 09:29:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:29:52,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:29:52,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-03 09:29:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-03 09:29:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-03 09:29:52,767 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:29:52,769 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:29:52,884 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L43: call ULTIMATE.dealloc(main_~#array~0#1.base, main_~#array~0#1.offset);havoc main_~#array~0#1.base, main_~#array~0#1.offset; [2025-03-03 09:29:52,890 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-03-03 09:29:52,890 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:29:52,896 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:29:52,896 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:29:52,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:29:52 BoogieIcfgContainer [2025-03-03 09:29:52,896 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:29:52,898 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:29:52,898 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:29:52,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:29:52,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:29:52" (1/3) ... [2025-03-03 09:29:52,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a61c41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:29:52, skipping insertion in model container [2025-03-03 09:29:52,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:29:52" (2/3) ... [2025-03-03 09:29:52,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a61c41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:29:52, skipping insertion in model container [2025-03-03 09:29:52,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:29:52" (3/3) ... [2025-03-03 09:29:52,903 INFO L128 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2025-03-03 09:29:52,912 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:29:52,914 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array29_pattern.c that has 1 procedures, 17 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-03 09:29:52,956 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:29:52,966 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;@d172661, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:29:52,968 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:29:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2025-03-03 09:29:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 09:29:52,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:52,977 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:52,978 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:52,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1736782630, now seen corresponding path program 1 times [2025-03-03 09:29:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982781100] [2025-03-03 09:29:52,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:53,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 09:29:53,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 09:29:53,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:53,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:29:53,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:53,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982781100] [2025-03-03 09:29:53,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982781100] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:29:53,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:29:53,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-03 09:29:53,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446472749] [2025-03-03 09:29:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:29:53,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-03 09:29:53,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:53,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-03 09:29:53,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-03 09:29:53,104 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:29:53,112 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2025-03-03 09:29:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-03 09:29:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2025-03-03 09:29:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:29:53,117 INFO L225 Difference]: With dead ends: 31 [2025-03-03 09:29:53,117 INFO L226 Difference]: Without dead ends: 13 [2025-03-03 09:29:53,119 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 [2025-03-03 09:29:53,123 INFO L435 NwaCegarLoop]: 21 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, 21 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 [2025-03-03 09:29:53,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:29:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-03 09:29:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-03 09:29:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2025-03-03 09:29:53,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 8 [2025-03-03 09:29:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:29:53,145 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2025-03-03 09:29:53,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2025-03-03 09:29:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-03 09:29:53,146 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:53,146 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:53,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:29:53,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:53,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1708153479, now seen corresponding path program 1 times [2025-03-03 09:29:53,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:53,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035315393] [2025-03-03 09:29:53,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:53,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-03 09:29:53,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-03 09:29:53,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:53,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:29:53,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:53,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035315393] [2025-03-03 09:29:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035315393] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:29:53,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:29:53,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:29:53,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557463439] [2025-03-03 09:29:53,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:29:53,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:29:53,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:53,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:29:53,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:29:53,337 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:29:53,385 INFO L93 Difference]: Finished difference Result 24 states and 34 transitions. [2025-03-03 09:29:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:29:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2025-03-03 09:29:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:29:53,385 INFO L225 Difference]: With dead ends: 24 [2025-03-03 09:29:53,385 INFO L226 Difference]: Without dead ends: 19 [2025-03-03 09:29:53,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:29:53,386 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:29:53,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:29:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-03-03 09:29:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2025-03-03 09:29:53,389 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) [2025-03-03 09:29:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2025-03-03 09:29:53,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2025-03-03 09:29:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:29:53,389 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2025-03-03 09:29:53,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2025-03-03 09:29:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-03 09:29:53,391 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:53,391 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:53,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:29:53,392 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:53,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1998959274, now seen corresponding path program 1 times [2025-03-03 09:29:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:53,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122501538] [2025-03-03 09:29:53,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:53,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:53,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-03 09:29:53,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-03 09:29:53,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:53,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 09:29:53,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:53,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122501538] [2025-03-03 09:29:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122501538] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:29:53,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:29:53,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 09:29:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044255327] [2025-03-03 09:29:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:29:53,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:29:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:53,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:29:53,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:29:53,495 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:29:53,551 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2025-03-03 09:29:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:29:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2025-03-03 09:29:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:29:53,552 INFO L225 Difference]: With dead ends: 33 [2025-03-03 09:29:53,552 INFO L226 Difference]: Without dead ends: 23 [2025-03-03 09:29:53,552 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 [2025-03-03 09:29:53,552 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:29:53,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:29:53,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-03 09:29:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2025-03-03 09:29:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2025-03-03 09:29:53,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2025-03-03 09:29:53,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:29:53,559 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2025-03-03 09:29:53,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2025-03-03 09:29:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-03-03 09:29:53,560 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:53,560 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:53,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-03 09:29:53,560 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:53,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:53,560 INFO L85 PathProgramCache]: Analyzing trace with hash 919905528, now seen corresponding path program 1 times [2025-03-03 09:29:53,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:53,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339236864] [2025-03-03 09:29:53,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:53,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 09:29:53,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 09:29:53,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:53,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:29:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339236864] [2025-03-03 09:29:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339236864] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:29:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374122970] [2025-03-03 09:29:53,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:53,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:53,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:29:53,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:29:53,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:29:53,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-03 09:29:53,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-03 09:29:53,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:53,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:53,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:29:53,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:29:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:29:53,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:29:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-03 09:29:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374122970] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:29:53,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:29:53,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-03 09:29:53,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760922518] [2025-03-03 09:29:53,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:29:53,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 09:29:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:53,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 09:29:53,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:29:53,884 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2025-03-03 09:29:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:29:53,962 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2025-03-03 09:29:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:29:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) Word has length 16 [2025-03-03 09:29:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:29:53,963 INFO L225 Difference]: With dead ends: 37 [2025-03-03 09:29:53,964 INFO L226 Difference]: Without dead ends: 26 [2025-03-03 09:29:53,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:29:53,965 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:29:53,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 14 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:29:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-03 09:29:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2025-03-03 09:29:53,972 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) [2025-03-03 09:29:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2025-03-03 09:29:53,973 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2025-03-03 09:29:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:29:53,973 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2025-03-03 09:29:53,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2025-03-03 09:29:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2025-03-03 09:29:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2025-03-03 09:29:53,974 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:53,974 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:53,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:29:54,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:54,175 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:54,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1426018217, now seen corresponding path program 1 times [2025-03-03 09:29:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157136369] [2025-03-03 09:29:54,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:54,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 09:29:54,188 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:29:54,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:54,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:29:54,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157136369] [2025-03-03 09:29:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157136369] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:29:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751056358] [2025-03-03 09:29:54,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:29:54,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:29:54,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:29:54,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:29:54,299 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-03 09:29:54,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-03 09:29:54,311 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:29:54,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:54,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 09:29:54,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:29:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:29:54,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:29:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 09:29:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751056358] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:29:54,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:29:54,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-03-03 09:29:54,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941059877] [2025-03-03 09:29:54,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:29:54,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 09:29:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:54,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 09:29:54,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-03-03 09:29:54,416 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:29:54,601 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2025-03-03 09:29:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 09:29:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 20 [2025-03-03 09:29:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:29:54,604 INFO L225 Difference]: With dead ends: 74 [2025-03-03 09:29:54,604 INFO L226 Difference]: Without dead ends: 58 [2025-03-03 09:29:54,604 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2025-03-03 09:29:54,605 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:29:54,605 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:29:54,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-03 09:29:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2025-03-03 09:29:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2025-03-03 09:29:54,612 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2025-03-03 09:29:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:29:54,613 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2025-03-03 09:29:54,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2025-03-03 09:29:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 09:29:54,614 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:54,614 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:54,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:29:54,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:54,815 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:54,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:54,815 INFO L85 PathProgramCache]: Analyzing trace with hash -529554348, now seen corresponding path program 2 times [2025-03-03 09:29:54,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:54,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760788854] [2025-03-03 09:29:54,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:29:54,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:54,824 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:29:54,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:29:54,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:29:54,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:29:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760788854] [2025-03-03 09:29:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760788854] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:29:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6969214] [2025-03-03 09:29:55,025 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:29:55,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:55,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:29:55,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:29:55,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:29:55,059 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-03 09:29:55,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:29:55,076 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:29:55,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:55,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 09:29:55,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:29:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-03 09:29:55,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:29:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-03 09:29:55,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6969214] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:29:55,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:29:55,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 16 [2025-03-03 09:29:55,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975265764] [2025-03-03 09:29:55,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:29:55,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 09:29:55,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:55,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 09:29:55,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:29:55,190 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:29:55,602 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2025-03-03 09:29:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 09:29:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 32 [2025-03-03 09:29:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:29:55,605 INFO L225 Difference]: With dead ends: 83 [2025-03-03 09:29:55,605 INFO L226 Difference]: Without dead ends: 55 [2025-03-03 09:29:55,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 09:29:55,607 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:29:55,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 42 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:29:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-03-03 09:29:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2025-03-03 09:29:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 43 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) [2025-03-03 09:29:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2025-03-03 09:29:55,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 32 [2025-03-03 09:29:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:29:55,618 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2025-03-03 09:29:55,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:29:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2025-03-03 09:29:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-03 09:29:55,619 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:29:55,619 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:29:55,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 09:29:55,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:55,820 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:29:55,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:29:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2037106157, now seen corresponding path program 3 times [2025-03-03 09:29:55,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:29:55,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747101004] [2025-03-03 09:29:55,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:29:55,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:29:55,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 6 equivalence classes. [2025-03-03 09:29:55,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:29:55,862 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:29:55,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 09:29:55,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749515658] [2025-03-03 09:29:55,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:29:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:29:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:29:55,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:29:55,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:29:55,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 6 equivalence classes. [2025-03-03 09:29:56,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 32 of 32 statements. [2025-03-03 09:29:56,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-03 09:29:56,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:29:56,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 70 conjuncts are in the unsatisfiable core [2025-03-03 09:29:56,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:29:56,433 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 [2025-03-03 09:29:56,507 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 [2025-03-03 09:29:56,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:29:56,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:29:56,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:29:56,632 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 28 treesize of output 30 [2025-03-03 09:29:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:29:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:29:56,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:29:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:29:56,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:29:56,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2025-03-03 09:29:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:29:57,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:29:58,422 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 42 treesize of output 38 [2025-03-03 09:29:58,427 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 66 treesize of output 58 [2025-03-03 09:29:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:29:58,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:29:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747101004] [2025-03-03 09:29:58,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-03 09:29:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749515658] [2025-03-03 09:29:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749515658] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:29:58,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:29:58,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2025-03-03 09:29:58,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266112003] [2025-03-03 09:29:58,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-03 09:29:58,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-03 09:29:58,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:29:58,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-03 09:29:58,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1930, Unknown=0, NotChecked=0, Total=2352 [2025-03-03 09:29:58,521 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:30:07,392 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2025-03-03 09:30:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-03-03 09:30:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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 32 [2025-03-03 09:30:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:30:07,393 INFO L225 Difference]: With dead ends: 160 [2025-03-03 09:30:07,393 INFO L226 Difference]: Without dead ends: 122 [2025-03-03 09:30:07,400 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1878, Invalid=8222, Unknown=0, NotChecked=0, Total=10100 [2025-03-03 09:30:07,402 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 09:30:07,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 77 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 09:30:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-03-03 09:30:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2025-03-03 09:30:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2025-03-03 09:30:07,425 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 32 [2025-03-03 09:30:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:30:07,425 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2025-03-03 09:30:07,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2025-03-03 09:30:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-03 09:30:07,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:30:07,426 INFO L218 NwaCegarLoop]: trace histogram [7, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:30:07,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 09:30:07,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:07,627 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:30:07,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:30:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1406952403, now seen corresponding path program 4 times [2025-03-03 09:30:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:30:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157022589] [2025-03-03 09:30:07,627 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:30:07,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:30:07,637 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-03 09:30:07,646 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 32 of 35 statements. [2025-03-03 09:30:07,646 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:30:07,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 09:30:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:30:07,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157022589] [2025-03-03 09:30:07,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157022589] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:30:07,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658208281] [2025-03-03 09:30:07,767 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 09:30:07,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:30:07,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:30:07,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:30:07,802 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-03 09:30:07,815 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 32 of 35 statements. [2025-03-03 09:30:07,815 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 09:30:07,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:07,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:30:07,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:30:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 09:30:07,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:30:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 09:30:07,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658208281] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:30:07,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:30:07,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 15 [2025-03-03 09:30:07,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645224337] [2025-03-03 09:30:07,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:30:07,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 09:30:07,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:30:07,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 09:30:07,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-03-03 09:30:07,900 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:30:07,998 INFO L93 Difference]: Finished difference Result 211 states and 265 transitions. [2025-03-03 09:30:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 09:30:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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 35 [2025-03-03 09:30:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:30:07,999 INFO L225 Difference]: With dead ends: 211 [2025-03-03 09:30:07,999 INFO L226 Difference]: Without dead ends: 152 [2025-03-03 09:30:07,999 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2025-03-03 09:30:08,001 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:30:08,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:30:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-03 09:30:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 126. [2025-03-03 09:30:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.224) internal successors, (153), 125 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2025-03-03 09:30:08,022 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 35 [2025-03-03 09:30:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:30:08,022 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2025-03-03 09:30:08,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2025-03-03 09:30:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 09:30:08,023 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:30:08,023 INFO L218 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:30:08,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 09:30:08,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:08,223 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:30:08,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:30:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash -188499851, now seen corresponding path program 5 times [2025-03-03 09:30:08,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:30:08,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681343628] [2025-03-03 09:30:08,224 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:30:08,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:30:08,230 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 7 equivalence classes. [2025-03-03 09:30:08,245 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 09:30:08,245 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 09:30:08,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-03 09:30:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:30:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681343628] [2025-03-03 09:30:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681343628] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:30:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728939810] [2025-03-03 09:30:08,303 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 09:30:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:30:08,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:30:08,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:30:08,339 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 7 equivalence classes. [2025-03-03 09:30:08,427 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 09:30:08,427 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 09:30:08,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:08,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 09:30:08,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:30:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 09:30:08,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:30:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 09:30:08,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728939810] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:30:08,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:30:08,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 23 [2025-03-03 09:30:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113641669] [2025-03-03 09:30:08,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:30:08,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 09:30:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:30:08,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 09:30:08,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2025-03-03 09:30:08,620 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:30:09,025 INFO L93 Difference]: Finished difference Result 246 states and 308 transitions. [2025-03-03 09:30:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-03 09:30:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 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 36 [2025-03-03 09:30:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:30:09,027 INFO L225 Difference]: With dead ends: 246 [2025-03-03 09:30:09,027 INFO L226 Difference]: Without dead ends: 127 [2025-03-03 09:30:09,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=782, Invalid=1974, Unknown=0, NotChecked=0, Total=2756 [2025-03-03 09:30:09,028 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:30:09,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 54 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:30:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2025-03-03 09:30:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2025-03-03 09:30:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.18) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2025-03-03 09:30:09,046 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 36 [2025-03-03 09:30:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:30:09,046 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2025-03-03 09:30:09,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2025-03-03 09:30:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 09:30:09,047 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:30:09,047 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:30:09,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-03 09:30:09,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:09,249 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:30:09,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:30:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1640209842, now seen corresponding path program 6 times [2025-03-03 09:30:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:30:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735008393] [2025-03-03 09:30:09,250 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:30:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:30:09,259 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 49 statements into 12 equivalence classes. [2025-03-03 09:30:09,275 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 43 of 49 statements. [2025-03-03 09:30:09,276 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 09:30:09,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 47 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:30:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:30:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735008393] [2025-03-03 09:30:09,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735008393] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:30:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43042654] [2025-03-03 09:30:09,355 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 09:30:09,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:30:09,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:30:09,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 09:30:09,395 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 49 statements into 12 equivalence classes. [2025-03-03 09:30:09,547 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 43 of 49 statements. [2025-03-03 09:30:09,547 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-03-03 09:30:09,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:09,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:30:09,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:30:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 88 proven. 34 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:30:09,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:30:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-03 09:30:09,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43042654] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:30:09,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:30:09,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2025-03-03 09:30:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457167641] [2025-03-03 09:30:09,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:30:09,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:30:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:30:09,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:30:09,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:30:09,683 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:30:09,778 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2025-03-03 09:30:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 09:30:09,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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 49 [2025-03-03 09:30:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:30:09,780 INFO L225 Difference]: With dead ends: 116 [2025-03-03 09:30:09,780 INFO L226 Difference]: Without dead ends: 101 [2025-03-03 09:30:09,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:30:09,784 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:30:09,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 32 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:30:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-03-03 09:30:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2025-03-03 09:30:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2025-03-03 09:30:09,804 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 49 [2025-03-03 09:30:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:30:09,804 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2025-03-03 09:30:09,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2025-03-03 09:30:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 09:30:09,805 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:30:09,805 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:30:09,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 09:30:10,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:10,006 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:30:10,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:30:10,006 INFO L85 PathProgramCache]: Analyzing trace with hash 908146570, now seen corresponding path program 7 times [2025-03-03 09:30:10,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:30:10,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099937508] [2025-03-03 09:30:10,006 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:30:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:30:10,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 09:30:10,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:30:10,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:30:10,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-03-03 09:30:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:30:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099937508] [2025-03-03 09:30:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099937508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:30:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54673167] [2025-03-03 09:30:10,127 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 09:30:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:30:10,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:30:10,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 09:30:10,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 09:30:10,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:30:10,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:30:10,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:10,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 09:30:10,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:30:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-03-03 09:30:10,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:30:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-03-03 09:30:10,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54673167] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:30:10,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:30:10,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-03 09:30:10,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799910822] [2025-03-03 09:30:10,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:30:10,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:30:10,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:30:10,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:30:10,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:30:10,322 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2025-03-03 09:30:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:30:10,470 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2025-03-03 09:30:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 09:30:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 51 [2025-03-03 09:30:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:30:10,472 INFO L225 Difference]: With dead ends: 94 [2025-03-03 09:30:10,472 INFO L226 Difference]: Without dead ends: 91 [2025-03-03 09:30:10,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2025-03-03 09:30:10,472 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:30:10,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:30:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-03-03 09:30:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2025-03-03 09:30:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 09:30:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2025-03-03 09:30:10,487 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 51 [2025-03-03 09:30:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:30:10,487 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2025-03-03 09:30:10,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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) [2025-03-03 09:30:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2025-03-03 09:30:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-03 09:30:10,488 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:30:10,488 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:30:10,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 09:30:10,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-03 09:30:10,692 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:30:10,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:30:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1356578458, now seen corresponding path program 8 times [2025-03-03 09:30:10,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:30:10,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862005562] [2025-03-03 09:30:10,693 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:30:10,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:30:10,700 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-03-03 09:30:10,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:30:10,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:30:10,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-03 09:30:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885933084] [2025-03-03 09:30:10,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:30:10,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:30:10,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:30:10,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:30:10,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 09:30:10,770 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-03-03 09:30:10,883 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:30:10,883 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:30:10,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:30:10,885 WARN L254 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-03-03 09:30:10,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:30:10,934 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 [2025-03-03 09:30:10,974 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 [2025-03-03 09:30:11,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,050 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 [2025-03-03 09:30:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2025-03-03 09:30:11,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 54 [2025-03-03 09:30:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2025-03-03 09:30:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2025-03-03 09:30:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2025-03-03 09:30:11,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-03 09:30:11,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-03 09:30:11,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 108 [2025-03-03 09:30:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 2 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 09:30:12,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:30:34,829 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 1173 treesize of output 1155