./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.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/recursive-simple/fibo_2calls_10-2.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 ad793266928b7f31f4ee1b23974468bb9f6761486c9c1aae6fbee8a7b7aca3db --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:33:51,459 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:33:51,503 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:33:51,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:33:51,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:33:51,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:33:51,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:33:51,523 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:33:51,524 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:33:51,524 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:33:51,524 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:33:51,524 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:33:51,524 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:33:51,524 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:33:51,524 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:33:51,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:33:51,525 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:33:51,525 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:51,526 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:33:51,526 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:33:51,527 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:33:51,527 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:33:51,527 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 -> ad793266928b7f31f4ee1b23974468bb9f6761486c9c1aae6fbee8a7b7aca3db [2025-03-03 14:33:51,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:33:51,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:33:51,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:33:51,764 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:33:51,764 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:33:51,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c [2025-03-03 14:33:52,900 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca8bfd05/0a81661757604d8594fad4fc7c8a21f5/FLAG36dd7fb73 [2025-03-03 14:33:53,140 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:33:53,141 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_10-2.c [2025-03-03 14:33:53,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca8bfd05/0a81661757604d8594fad4fc7c8a21f5/FLAG36dd7fb73 [2025-03-03 14:33:53,468 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca8bfd05/0a81661757604d8594fad4fc7c8a21f5 [2025-03-03 14:33:53,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:33:53,471 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:33:53,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:53,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:33:53,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:33:53,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b169f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53, skipping insertion in model container [2025-03-03 14:33:53,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,489 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:33:53,593 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/recursive-simple/fibo_2calls_10-2.c[949,962] [2025-03-03 14:33:53,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:53,605 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:33:53,615 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/recursive-simple/fibo_2calls_10-2.c[949,962] [2025-03-03 14:33:53,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:53,625 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:33:53,626 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53 WrapperNode [2025-03-03 14:33:53,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:53,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:53,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:33:53,628 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:33:53,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,646 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:33:53,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:53,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:33:53,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:33:53,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:33:53,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,660 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:33:53,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,662 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,663 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:33:53,664 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:33:53,664 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:33:53,664 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:33:53,665 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (1/1) ... [2025-03-03 14:33:53,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:53,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:53,687 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 14:33:53,693 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 14:33:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:33:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:33:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-03 14:33:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-03 14:33:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-03 14:33:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-03 14:33:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:33:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:33:53,750 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:33:53,751 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:33:53,811 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-03 14:33:53,822 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:33:53,828 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 14:33:53,828 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:33:53,837 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:33:53,838 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:33:53,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:53 BoogieIcfgContainer [2025-03-03 14:33:53,838 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:33:53,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:33:53,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:33:53,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:33:53,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:33:53" (1/3) ... [2025-03-03 14:33:53,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b46d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:53, skipping insertion in model container [2025-03-03 14:33:53,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:53" (2/3) ... [2025-03-03 14:33:53,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b46d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:53, skipping insertion in model container [2025-03-03 14:33:53,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:53" (3/3) ... [2025-03-03 14:33:53,846 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2025-03-03 14:33:53,857 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:33:53,859 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_10-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:33:53,900 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:33:53,908 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;@6bc89a0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:33:53,910 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:33:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:33:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:33:53,916 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:53,916 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:53,917 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:53,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-03 14:33:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:53,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930595400] [2025-03-03 14:33:53,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:53,970 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:33:53,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:33:53,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:53,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:54,086 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 14:33:54,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930595400] [2025-03-03 14:33:54,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930595400] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:54,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:54,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264644128] [2025-03-03 14:33:54,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:54,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:54,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:54,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:54,105 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:54,140 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-03-03 14:33:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-03 14:33:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:54,146 INFO L225 Difference]: With dead ends: 39 [2025-03-03 14:33:54,146 INFO L226 Difference]: Without dead ends: 27 [2025-03-03 14:33:54,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:54,149 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:54,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-03 14:33:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-03 14:33:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:33:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:33:54,174 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-03 14:33:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:54,174 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:33:54,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:33:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:33:54,175 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:54,175 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:54,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:33:54,175 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:54,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-03 14:33:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687014105] [2025-03-03 14:33:54,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:54,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:33:54,183 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:33:54,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:54,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:54,231 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 14:33:54,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:54,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687014105] [2025-03-03 14:33:54,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687014105] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:54,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:54,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:54,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059046979] [2025-03-03 14:33:54,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:54,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:54,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:54,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:54,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:54,235 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:54,251 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 14:33:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-03 14:33:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:54,253 INFO L225 Difference]: With dead ends: 33 [2025-03-03 14:33:54,253 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:33:54,254 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:54,255 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:54,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:33:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:33:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:33:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:33:54,261 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-03 14:33:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:54,262 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:33:54,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:33:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:33:54,262 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:54,262 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:54,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:33:54,263 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:54,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-03 14:33:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:54,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233446803] [2025-03-03 14:33:54,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:54,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:54,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:54,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:54,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:54,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:54,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233446803] [2025-03-03 14:33:54,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233446803] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540222594] [2025-03-03 14:33:54,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:54,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:54,358 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 14:33:54,359 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 14:33:54,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:54,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:54,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:54,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:54,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:54,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:54,484 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:54,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540222594] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:54,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:54,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 14:33:54,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868815966] [2025-03-03 14:33:54,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:54,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:33:54,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:54,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:33:54,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:33:54,660 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:33:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:54,767 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-03 14:33:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:33:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-03 14:33:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:54,769 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:33:54,769 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:33:54,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:33:54,770 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:54,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:33:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-03 14:33:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-03 14:33:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-03 14:33:54,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-03 14:33:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:54,775 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-03 14:33:54,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:33:54,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-03 14:33:54,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:33:54,776 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:54,776 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:54,782 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 14:33:54,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:54,977 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:54,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-03 14:33:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:54,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140871265] [2025-03-03 14:33:54,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:54,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:54,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:54,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:54,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:55,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140871265] [2025-03-03 14:33:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140871265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885234534] [2025-03-03 14:33:55,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:55,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:55,083 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 14:33:55,085 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 14:33:55,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:55,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:55,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:55,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:55,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:55,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:55,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885234534] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:55,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:55,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-03 14:33:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649436722] [2025-03-03 14:33:55,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:55,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:33:55,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:55,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:33:55,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:33:55,280 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:33:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:55,379 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 14:33:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:33:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-03 14:33:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:55,381 INFO L225 Difference]: With dead ends: 40 [2025-03-03 14:33:55,381 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 14:33:55,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:33:55,382 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:55,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 14:33:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-03 14:33:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-03 14:33:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-03 14:33:55,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-03 14:33:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:55,386 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-03 14:33:55,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:33:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-03 14:33:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 14:33:55,387 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:55,387 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:55,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:33:55,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 14:33:55,588 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:55,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-03 14:33:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:55,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438871798] [2025-03-03 14:33:55,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:55,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:33:55,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:33:55,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:55,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:33:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438871798] [2025-03-03 14:33:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438871798] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646137462] [2025-03-03 14:33:55,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:55,657 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 14:33:55,659 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 14:33:55,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:33:55,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:33:55,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:55,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:55,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:33:55,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:33:55,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:33:56,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646137462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:56,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:56,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-03 14:33:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523136831] [2025-03-03 14:33:56,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:56,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:33:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:56,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:33:56,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:33:56,041 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:33:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:56,172 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-03 14:33:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:33:56,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-03-03 14:33:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:56,174 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:33:56,174 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:33:56,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:56,175 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:56,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:33:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 14:33:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 14:33:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-03 14:33:56,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-03 14:33:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:56,186 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-03 14:33:56,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:33:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-03 14:33:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:33:56,186 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:56,187 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:56,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:56,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:56,387 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:56,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-03 14:33:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413566194] [2025-03-03 14:33:56,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:56,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:33:56,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:33:56,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:56,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 14:33:56,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413566194] [2025-03-03 14:33:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413566194] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367984096] [2025-03-03 14:33:56,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:56,487 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 14:33:56,488 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 14:33:56,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:33:56,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:33:56,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:56,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:56,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:33:56,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:33:56,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:33:56,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367984096] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:56,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:56,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-03 14:33:56,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312376102] [2025-03-03 14:33:56,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:56,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:33:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:56,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:33:56,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:33:56,829 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:33:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:57,155 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-03 14:33:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:33:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-03-03 14:33:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:57,156 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:33:57,156 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:33:57,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:33:57,157 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:57,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:33:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:33:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-03 14:33:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-03 14:33:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-03 14:33:57,167 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-03 14:33:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:57,167 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-03 14:33:57,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:33:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-03 14:33:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 14:33:57,169 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:57,169 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:57,174 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 14:33:57,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:57,369 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:57,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:57,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-03 14:33:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293277722] [2025-03-03 14:33:57,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:57,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:33:57,384 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:33:57,384 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:57,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:33:57,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293277722] [2025-03-03 14:33:57,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293277722] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255622679] [2025-03-03 14:33:57,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:57,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:57,483 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 14:33:57,484 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 14:33:57,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:33:57,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:33:57,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:57,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:57,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:33:57,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-03 14:33:57,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:33:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255622679] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:57,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:57,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-03 14:33:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125786249] [2025-03-03 14:33:57,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:57,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:33:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:57,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:33:57,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:33:57,984 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-03 14:33:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:58,159 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-03 14:33:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:33:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-03-03 14:33:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:58,161 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:33:58,161 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 14:33:58,162 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:33:58,164 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:58,164 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 161 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 14:33:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-03 14:33:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-03 14:33:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:33:58,187 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-03 14:33:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:58,188 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:33:58,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-03 14:33:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:33:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:33:58,190 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:58,190 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:58,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-03 14:33:58,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:58,391 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:58,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-03 14:33:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:58,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055726631] [2025-03-03 14:33:58,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:58,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:33:58,408 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:33:58,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-03 14:33:58,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055726631] [2025-03-03 14:33:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055726631] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489359177] [2025-03-03 14:33:58,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:58,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:58,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:58,545 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 14:33:58,548 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 14:33:58,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:33:58,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:33:58,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:33:58,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-03 14:33:58,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 14:33:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489359177] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:59,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:59,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-03 14:33:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310637227] [2025-03-03 14:33:59,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:59,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:33:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:59,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:33:59,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:33:59,351 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-03 14:33:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:59,799 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-03 14:33:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:33:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2025-03-03 14:33:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:59,804 INFO L225 Difference]: With dead ends: 177 [2025-03-03 14:33:59,804 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 14:33:59,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:33:59,809 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:59,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:33:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 14:33:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-03 14:33:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-03 14:33:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-03 14:33:59,827 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-03 14:33:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:59,827 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-03 14:33:59,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-03 14:33:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-03 14:33:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 14:33:59,831 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:59,831 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:59,837 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 14:34:00,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:00,032 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:00,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 869810860, now seen corresponding path program 1 times [2025-03-03 14:34:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:00,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288434253] [2025-03-03 14:34:00,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:00,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:00,037 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-03 14:34:00,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 14:34:00,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:00,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2025-03-03 14:34:00,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:00,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288434253] [2025-03-03 14:34:00,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288434253] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:00,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521280907] [2025-03-03 14:34:00,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:00,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:00,205 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 14:34:00,207 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 14:34:00,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-03 14:34:00,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 14:34:00,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:00,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:00,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 205 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2025-03-03 14:34:00,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 221 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2025-03-03 14:34:01,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521280907] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:01,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:01,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-03 14:34:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287820293] [2025-03-03 14:34:01,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:01,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:01,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:01,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:01,297 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:34:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:01,483 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-03 14:34:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:34:01,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2025-03-03 14:34:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:01,486 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:34:01,486 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 14:34:01,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:34:01,489 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:01,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 209 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 14:34:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-03 14:34:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-03-03 14:34:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-03 14:34:01,507 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2025-03-03 14:34:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:01,507 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-03 14:34:01,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:34:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-03 14:34:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2025-03-03 14:34:01,509 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:01,510 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 19, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:01,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 14:34:01,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:01,710 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:01,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 108794173, now seen corresponding path program 2 times [2025-03-03 14:34:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:01,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97279059] [2025-03-03 14:34:01,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:01,724 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-03 14:34:01,749 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-03 14:34:01,750 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:01,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-03 14:34:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97279059] [2025-03-03 14:34:02,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97279059] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411940281] [2025-03-03 14:34:02,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:02,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:02,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:02,091 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 14:34:02,094 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 14:34:02,152 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-03 14:34:02,196 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-03 14:34:02,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:02,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:34:02,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-03 14:34:02,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 590 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2025-03-03 14:34:03,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411940281] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:03,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:03,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-03-03 14:34:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81065771] [2025-03-03 14:34:03,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:03,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:34:03,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:03,661 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:34:03,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:03,661 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-03-03 14:34:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:03,839 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-03 14:34:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 285 [2025-03-03 14:34:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:03,841 INFO L225 Difference]: With dead ends: 148 [2025-03-03 14:34:03,841 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 14:34:03,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 560 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:03,842 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:03,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 174 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 14:34:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-03 14:34:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-03-03 14:34:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-03 14:34:03,858 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 285 [2025-03-03 14:34:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:03,858 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-03 14:34:03,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-03-03 14:34:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-03 14:34:03,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2025-03-03 14:34:03,863 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:03,863 INFO L218 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 23, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 10, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:03,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 14:34:04,063 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,SelfDestructingSolverStorable9 [2025-03-03 14:34:04,064 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:04,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -935726768, now seen corresponding path program 3 times [2025-03-03 14:34:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195383179] [2025-03-03 14:34:04,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:04,073 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-03 14:34:04,085 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-03 14:34:04,085 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:34:04,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 564 proven. 88 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-03 14:34:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:04,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195383179] [2025-03-03 14:34:04,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195383179] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:04,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151686233] [2025-03-03 14:34:04,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:04,221 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 14:34:04,222 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 14:34:04,294 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-03 14:34:04,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-03 14:34:04,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:34:04,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:04,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:04,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 575 proven. 91 refuted. 0 times theorem prover too weak. 3389 trivial. 0 not checked. [2025-03-03 14:34:04,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 579 proven. 97 refuted. 0 times theorem prover too weak. 3379 trivial. 0 not checked. [2025-03-03 14:34:05,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151686233] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:05,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:05,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-03-03 14:34:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802451513] [2025-03-03 14:34:05,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:05,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:05,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:05,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:05,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:05,409 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-03 14:34:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:05,544 INFO L93 Difference]: Finished difference Result 159 states and 292 transitions. [2025-03-03 14:34:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 378 [2025-03-03 14:34:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:05,547 INFO L225 Difference]: With dead ends: 159 [2025-03-03 14:34:05,547 INFO L226 Difference]: Without dead ends: 155 [2025-03-03 14:34:05,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 746 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:34:05,548 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:05,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-03 14:34:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2025-03-03 14:34:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 94 states have internal predecessors, (107), 26 states have call successors, (26), 10 states have call predecessors, (26), 22 states have return successors, (116), 36 states have call predecessors, (116), 26 states have call successors, (116) [2025-03-03 14:34:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 249 transitions. [2025-03-03 14:34:05,564 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 249 transitions. Word has length 378 [2025-03-03 14:34:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:05,565 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 249 transitions. [2025-03-03 14:34:05,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-03 14:34:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 249 transitions. [2025-03-03 14:34:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2025-03-03 14:34:05,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:05,574 INFO L218 NwaCegarLoop]: trace histogram [54, 54, 45, 45, 42, 39, 27, 27, 27, 27, 27, 27, 27, 22, 22, 22, 22, 22, 22, 22, 20, 12, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:05,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:05,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:05,774 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:05,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -353738821, now seen corresponding path program 4 times [2025-03-03 14:34:05,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:05,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209024654] [2025-03-03 14:34:05,775 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:05,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:05,788 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-03 14:34:05,823 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 578 of 679 statements. [2025-03-03 14:34:05,823 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:05,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 253 proven. 1281 refuted. 0 times theorem prover too weak. 12080 trivial. 0 not checked. [2025-03-03 14:34:06,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209024654] [2025-03-03 14:34:06,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209024654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:06,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435558889] [2025-03-03 14:34:06,260 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:06,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:06,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:06,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:34:06,365 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-03 14:34:06,451 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 578 of 679 statements. [2025-03-03 14:34:06,451 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:06,451 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:06,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:06,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 219 proven. 1812 refuted. 0 times theorem prover too weak. 11583 trivial. 0 not checked. [2025-03-03 14:34:06,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 219 proven. 1845 refuted. 0 times theorem prover too weak. 11550 trivial. 0 not checked. [2025-03-03 14:34:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435558889] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:09,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:09,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 27 [2025-03-03 14:34:09,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495979324] [2025-03-03 14:34:09,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:09,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:34:09,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:09,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:34:09,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:34:09,095 INFO L87 Difference]: Start difference. First operand 141 states and 249 transitions. Second operand has 27 states, 25 states have (on average 3.6) internal successors, (90), 27 states have internal predecessors, (90), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) [2025-03-03 14:34:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:09,383 INFO L93 Difference]: Finished difference Result 215 states and 560 transitions. [2025-03-03 14:34:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 14:34:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.6) internal successors, (90), 27 states have internal predecessors, (90), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) Word has length 679 [2025-03-03 14:34:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:09,390 INFO L225 Difference]: With dead ends: 215 [2025-03-03 14:34:09,390 INFO L226 Difference]: Without dead ends: 211 [2025-03-03 14:34:09,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1338 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:34:09,391 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:09,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 237 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2025-03-03 14:34:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 183. [2025-03-03 14:34:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 35 states have call successors, (35), 10 states have call predecessors, (35), 30 states have return successors, (250), 53 states have call predecessors, (250), 35 states have call successors, (250) [2025-03-03 14:34:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 417 transitions. [2025-03-03 14:34:09,413 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 417 transitions. Word has length 679 [2025-03-03 14:34:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:09,413 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 417 transitions. [2025-03-03 14:34:09,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.6) internal successors, (90), 27 states have internal predecessors, (90), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) [2025-03-03 14:34:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 417 transitions. [2025-03-03 14:34:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1310 [2025-03-03 14:34:09,422 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:09,422 INFO L218 NwaCegarLoop]: trace histogram [102, 102, 91, 91, 80, 67, 51, 51, 51, 51, 51, 51, 51, 45, 45, 45, 45, 45, 45, 45, 35, 24, 22, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:09,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:09,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 14:34:09,623 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:09,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1330390899, now seen corresponding path program 5 times [2025-03-03 14:34:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838544452] [2025-03-03 14:34:09,624 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:09,647 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1309 statements into 82 equivalence classes. [2025-03-03 14:34:09,649 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 50 of 1309 statements. [2025-03-03 14:34:09,650 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-03 14:34:09,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 51415 backedges. 644 proven. 1984 refuted. 0 times theorem prover too weak. 48787 trivial. 0 not checked. [2025-03-03 14:34:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838544452] [2025-03-03 14:34:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838544452] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572981283] [2025-03-03 14:34:09,711 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:09,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:09,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:09,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:34:09,863 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1309 statements into 82 equivalence classes. [2025-03-03 14:34:09,872 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 50 of 1309 statements. [2025-03-03 14:34:09,872 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-03 14:34:09,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:09,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:09,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 51415 backedges. 8068 proven. 6 refuted. 0 times theorem prover too weak. 43341 trivial. 0 not checked. [2025-03-03 14:34:09,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 51415 backedges. 669 proven. 2335 refuted. 0 times theorem prover too weak. 48411 trivial. 0 not checked. [2025-03-03 14:34:12,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572981283] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:12,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:12,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-03-03 14:34:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976428083] [2025-03-03 14:34:12,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:12,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-03 14:34:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:12,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-03 14:34:12,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-03 14:34:12,609 INFO L87 Difference]: Start difference. First operand 183 states and 417 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2025-03-03 14:34:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:12,736 INFO L93 Difference]: Finished difference Result 343 states and 924 transitions. [2025-03-03 14:34:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:34:12,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 1309 [2025-03-03 14:34:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:12,740 INFO L225 Difference]: With dead ends: 343 [2025-03-03 14:34:12,740 INFO L226 Difference]: Without dead ends: 168 [2025-03-03 14:34:12,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2630 GetRequests, 2608 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:12,743 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:12,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 135 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-03-03 14:34:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 155. [2025-03-03 14:34:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 100 states have internal predecessors, (114), 30 states have call successors, (30), 11 states have call predecessors, (30), 23 states have return successors, (173), 43 states have call predecessors, (173), 30 states have call successors, (173) [2025-03-03 14:34:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 317 transitions. [2025-03-03 14:34:12,777 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 317 transitions. Word has length 1309 [2025-03-03 14:34:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:12,778 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 317 transitions. [2025-03-03 14:34:12,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2025-03-03 14:34:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 317 transitions. [2025-03-03 14:34:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2025-03-03 14:34:12,786 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:12,786 INFO L218 NwaCegarLoop]: trace histogram [71, 71, 68, 68, 56, 54, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 21, 20, 17, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:12,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 14:34:12,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 14:34:12,987 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:12,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1055490447, now seen corresponding path program 6 times [2025-03-03 14:34:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:12,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364121087] [2025-03-03 14:34:12,988 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:12,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:13,011 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 948 statements into 56 equivalence classes. [2025-03-03 14:34:13,038 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 180 of 948 statements. [2025-03-03 14:34:13,040 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 14:34:13,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 26647 backedges. 1975 proven. 66 refuted. 0 times theorem prover too weak. 24606 trivial. 0 not checked. [2025-03-03 14:34:13,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:13,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364121087] [2025-03-03 14:34:13,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364121087] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:13,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129592357] [2025-03-03 14:34:13,173 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:13,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:13,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:13,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:34:13,310 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 948 statements into 56 equivalence classes. [2025-03-03 14:34:13,352 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 180 of 948 statements. [2025-03-03 14:34:13,352 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 14:34:13,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:13,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:13,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26647 backedges. 4211 proven. 19 refuted. 0 times theorem prover too weak. 22417 trivial. 0 not checked. [2025-03-03 14:34:13,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 26647 backedges. 2201 proven. 86 refuted. 0 times theorem prover too weak. 24360 trivial. 0 not checked. [2025-03-03 14:34:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129592357] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:15,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:15,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 18 [2025-03-03 14:34:15,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072419217] [2025-03-03 14:34:15,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:15,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:15,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:15,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:15,451 INFO L87 Difference]: Start difference. First operand 155 states and 317 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 11 states have call successors, (21), 2 states have call predecessors, (21), 6 states have return successors, (26), 6 states have call predecessors, (26), 11 states have call successors, (26) [2025-03-03 14:34:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:15,570 INFO L93 Difference]: Finished difference Result 297 states and 681 transitions. [2025-03-03 14:34:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:34:15,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 11 states have call successors, (21), 2 states have call predecessors, (21), 6 states have return successors, (26), 6 states have call predecessors, (26), 11 states have call successors, (26) Word has length 948 [2025-03-03 14:34:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:15,573 INFO L225 Difference]: With dead ends: 297 [2025-03-03 14:34:15,573 INFO L226 Difference]: Without dead ends: 148 [2025-03-03 14:34:15,575 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1910 GetRequests, 1884 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:15,575 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:15,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 267 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2025-03-03 14:34:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2025-03-03 14:34:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 95 states have (on average 1.105263157894737) internal successors, (105), 96 states have internal predecessors, (105), 27 states have call successors, (27), 10 states have call predecessors, (27), 23 states have return successors, (135), 39 states have call predecessors, (135), 27 states have call successors, (135) [2025-03-03 14:34:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 267 transitions. [2025-03-03 14:34:15,586 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 267 transitions. Word has length 948 [2025-03-03 14:34:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:15,587 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 267 transitions. [2025-03-03 14:34:15,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 11 states have call successors, (21), 2 states have call predecessors, (21), 6 states have return successors, (26), 6 states have call predecessors, (26), 11 states have call successors, (26) [2025-03-03 14:34:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 267 transitions. [2025-03-03 14:34:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2025-03-03 14:34:15,591 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:15,592 INFO L218 NwaCegarLoop]: trace histogram [65, 65, 56, 56, 50, 47, 32, 32, 32, 32, 32, 32, 32, 28, 28, 28, 28, 28, 28, 28, 22, 15, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:15,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:15,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 14:34:15,793 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:15,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 289355652, now seen corresponding path program 7 times [2025-03-03 14:34:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385505266] [2025-03-03 14:34:15,793 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:15,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 827 statements into 1 equivalence classes. [2025-03-03 14:34:15,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 827 of 827 statements. [2025-03-03 14:34:15,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:15,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20282 backedges. 394 proven. 1815 refuted. 0 times theorem prover too weak. 18073 trivial. 0 not checked. [2025-03-03 14:34:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:16,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385505266] [2025-03-03 14:34:16,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385505266] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:16,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558231287] [2025-03-03 14:34:16,430 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:16,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:16,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:16,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:34:16,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 827 statements into 1 equivalence classes. [2025-03-03 14:34:16,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 827 of 827 statements. [2025-03-03 14:34:16,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:16,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:16,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:34:16,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20282 backedges. 335 proven. 2486 refuted. 0 times theorem prover too weak. 17461 trivial. 0 not checked. [2025-03-03 14:34:16,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20282 backedges. 335 proven. 2530 refuted. 0 times theorem prover too weak. 17417 trivial. 0 not checked. [2025-03-03 14:34:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558231287] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:19,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2025-03-03 14:34:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947144810] [2025-03-03 14:34:19,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:19,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:34:19,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:20,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:34:20,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:20,000 INFO L87 Difference]: Start difference. First operand 146 states and 267 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2025-03-03 14:34:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:20,255 INFO L93 Difference]: Finished difference Result 247 states and 738 transitions. [2025-03-03 14:34:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-03 14:34:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) Word has length 827 [2025-03-03 14:34:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:20,260 INFO L225 Difference]: With dead ends: 247 [2025-03-03 14:34:20,260 INFO L226 Difference]: Without dead ends: 243 [2025-03-03 14:34:20,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1682 GetRequests, 1633 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2025-03-03 14:34:20,261 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:20,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 267 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-03-03 14:34:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 154. [2025-03-03 14:34:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 100 states have (on average 1.1) internal successors, (110), 101 states have internal predecessors, (110), 28 states have call successors, (28), 10 states have call predecessors, (28), 25 states have return successors, (162), 42 states have call predecessors, (162), 28 states have call successors, (162) [2025-03-03 14:34:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 300 transitions. [2025-03-03 14:34:20,282 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 300 transitions. Word has length 827 [2025-03-03 14:34:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:20,283 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 300 transitions. [2025-03-03 14:34:20,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 24 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2025-03-03 14:34:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 300 transitions. [2025-03-03 14:34:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1881 [2025-03-03 14:34:20,298 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:20,298 INFO L218 NwaCegarLoop]: trace histogram [150, 150, 125, 125, 120, 106, 75, 75, 75, 75, 75, 75, 75, 62, 62, 62, 62, 62, 62, 62, 45, 44, 44, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:20,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 14:34:20,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 14:34:20,502 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:20,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash -543890455, now seen corresponding path program 8 times [2025-03-03 14:34:20,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:20,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759267751] [2025-03-03 14:34:20,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:20,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:20,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1880 statements into 2 equivalence classes. [2025-03-03 14:34:20,748 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1880 of 1880 statements. [2025-03-03 14:34:20,748 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:20,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 107069 backedges. 1219 proven. 5526 refuted. 0 times theorem prover too weak. 100324 trivial. 0 not checked. [2025-03-03 14:34:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759267751] [2025-03-03 14:34:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759267751] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033372007] [2025-03-03 14:34:22,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:22,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:22,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:22,213 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:22,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:34:22,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1880 statements into 2 equivalence classes. [2025-03-03 14:34:22,709 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1880 of 1880 statements. [2025-03-03 14:34:22,709 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:22,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:22,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 4193 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:22,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 107069 backedges. 1156 proven. 6319 refuted. 0 times theorem prover too weak. 99594 trivial. 0 not checked. [2025-03-03 14:34:22,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 107069 backedges. 1160 proven. 6367 refuted. 0 times theorem prover too weak. 99542 trivial. 0 not checked. [2025-03-03 14:34:29,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033372007] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:29,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:29,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 23] total 34 [2025-03-03 14:34:29,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281605082] [2025-03-03 14:34:29,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:29,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 14:34:29,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:29,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 14:34:29,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:34:29,110 INFO L87 Difference]: Start difference. First operand 154 states and 300 transitions. Second operand has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 28 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 17 states have call predecessors, (47), 28 states have call successors, (47) [2025-03-03 14:34:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:29,907 INFO L93 Difference]: Finished difference Result 427 states and 1410 transitions. [2025-03-03 14:34:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-03 14:34:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 28 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 17 states have call predecessors, (47), 28 states have call successors, (47) Word has length 1880 [2025-03-03 14:34:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:29,910 INFO L225 Difference]: With dead ends: 427 [2025-03-03 14:34:29,910 INFO L226 Difference]: Without dead ends: 176 [2025-03-03 14:34:29,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3797 GetRequests, 3730 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=2799, Unknown=0, NotChecked=0, Total=3306 [2025-03-03 14:34:29,915 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 78 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:29,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 819 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 14:34:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-03 14:34:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2025-03-03 14:34:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.09009009009009) internal successors, (121), 109 states have internal predecessors, (121), 29 states have call successors, (29), 16 states have call predecessors, (29), 23 states have return successors, (94), 38 states have call predecessors, (94), 29 states have call successors, (94) [2025-03-03 14:34:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 244 transitions. [2025-03-03 14:34:29,928 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 244 transitions. Word has length 1880 [2025-03-03 14:34:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:29,928 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 244 transitions. [2025-03-03 14:34:29,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 28 states have call successors, (36), 1 states have call predecessors, (36), 15 states have return successors, (47), 17 states have call predecessors, (47), 28 states have call successors, (47) [2025-03-03 14:34:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 244 transitions. [2025-03-03 14:34:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1577 [2025-03-03 14:34:29,939 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:29,940 INFO L218 NwaCegarLoop]: trace histogram [122, 122, 109, 109, 94, 92, 61, 61, 61, 61, 61, 61, 61, 54, 54, 54, 54, 54, 54, 54, 38, 33, 30, 15, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:29,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 14:34:30,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:30,141 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:30,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1873432121, now seen corresponding path program 9 times [2025-03-03 14:34:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:30,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976162991] [2025-03-03 14:34:30,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:30,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:30,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1576 statements into 104 equivalence classes. [2025-03-03 14:34:30,247 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 317 of 1576 statements. [2025-03-03 14:34:30,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-03-03 14:34:30,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 74669 backedges. 4059 proven. 441 refuted. 0 times theorem prover too weak. 70169 trivial. 0 not checked. [2025-03-03 14:34:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976162991] [2025-03-03 14:34:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976162991] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719448224] [2025-03-03 14:34:30,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:30,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:30,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:30,521 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:30,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:34:30,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1576 statements into 104 equivalence classes. [2025-03-03 14:34:30,811 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) and asserted 317 of 1576 statements. [2025-03-03 14:34:30,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2025-03-03 14:34:30,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:30,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:30,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 74669 backedges. 20313 proven. 33 refuted. 0 times theorem prover too weak. 54323 trivial. 0 not checked. [2025-03-03 14:34:30,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 74669 backedges. 4400 proven. 503 refuted. 0 times theorem prover too weak. 69766 trivial. 0 not checked. [2025-03-03 14:34:34,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719448224] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:34,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:34,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 13] total 24 [2025-03-03 14:34:34,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204165574] [2025-03-03 14:34:34,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:34,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:34:34,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:34,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:34:34,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:34:34,213 INFO L87 Difference]: Start difference. First operand 164 states and 244 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 24 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) [2025-03-03 14:34:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:34,416 INFO L93 Difference]: Finished difference Result 325 states and 534 transitions. [2025-03-03 14:34:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:34:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 24 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) Word has length 1576 [2025-03-03 14:34:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:34,419 INFO L225 Difference]: With dead ends: 325 [2025-03-03 14:34:34,419 INFO L226 Difference]: Without dead ends: 171 [2025-03-03 14:34:34,420 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3173 GetRequests, 3138 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:34:34,420 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:34,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 280 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-03 14:34:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2025-03-03 14:34:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 111 states have internal predecessors, (123), 29 states have call successors, (29), 18 states have call predecessors, (29), 23 states have return successors, (90), 38 states have call predecessors, (90), 29 states have call successors, (90) [2025-03-03 14:34:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 242 transitions. [2025-03-03 14:34:34,431 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 242 transitions. Word has length 1576 [2025-03-03 14:34:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:34,432 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 242 transitions. [2025-03-03 14:34:34,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 24 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) [2025-03-03 14:34:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 242 transitions. [2025-03-03 14:34:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2398 [2025-03-03 14:34:34,482 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:34,483 INFO L218 NwaCegarLoop]: trace histogram [181, 181, 170, 170, 149, 138, 90, 90, 90, 90, 90, 90, 90, 85, 85, 85, 85, 85, 85, 85, 64, 48, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:34,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-03 14:34:34,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 14:34:34,683 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:34,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1296612503, now seen corresponding path program 10 times [2025-03-03 14:34:34,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:34,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486585246] [2025-03-03 14:34:34,684 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:34,715 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2397 statements into 2 equivalence classes. [2025-03-03 14:34:34,931 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2044 of 2397 statements. [2025-03-03 14:34:34,931 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:34,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 173399 backedges. 1069 proven. 6554 refuted. 0 times theorem prover too weak. 165776 trivial. 0 not checked. [2025-03-03 14:34:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:36,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486585246] [2025-03-03 14:34:36,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486585246] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:36,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907658528] [2025-03-03 14:34:36,919 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:36,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:36,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:36,921 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:36,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:34:37,175 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2397 statements into 2 equivalence classes. [2025-03-03 14:34:37,498 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2044 of 2397 statements. [2025-03-03 14:34:37,498 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:37,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:37,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 4266 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:37,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 173399 backedges. 1069 proven. 6554 refuted. 0 times theorem prover too weak. 165776 trivial. 0 not checked. [2025-03-03 14:34:37,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 173399 backedges. 1071 proven. 6585 refuted. 0 times theorem prover too weak. 165743 trivial. 0 not checked. [2025-03-03 14:34:43,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907658528] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:43,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:43,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 21 [2025-03-03 14:34:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398589918] [2025-03-03 14:34:43,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:43,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-03 14:34:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:43,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-03 14:34:43,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:34:43,463 INFO L87 Difference]: Start difference. First operand 168 states and 242 transitions. Second operand has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-03 14:34:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:43,679 INFO L93 Difference]: Finished difference Result 242 states and 444 transitions. [2025-03-03 14:34:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:34:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) Word has length 2397 [2025-03-03 14:34:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:43,683 INFO L225 Difference]: With dead ends: 242 [2025-03-03 14:34:43,684 INFO L226 Difference]: Without dead ends: 233 [2025-03-03 14:34:43,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4818 GetRequests, 4783 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:43,685 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:43,685 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 210 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2025-03-03 14:34:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 171. [2025-03-03 14:34:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 113 states have internal predecessors, (125), 29 states have call successors, (29), 18 states have call predecessors, (29), 24 states have return successors, (99), 39 states have call predecessors, (99), 29 states have call successors, (99) [2025-03-03 14:34:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 253 transitions. [2025-03-03 14:34:43,699 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 253 transitions. Word has length 2397 [2025-03-03 14:34:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:43,699 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 253 transitions. [2025-03-03 14:34:43,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 21 states have internal predecessors, (75), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 11 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-03 14:34:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 253 transitions. [2025-03-03 14:34:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2394 [2025-03-03 14:34:43,720 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:43,721 INFO L218 NwaCegarLoop]: trace histogram [181, 181, 170, 170, 142, 141, 90, 90, 90, 90, 90, 90, 90, 85, 85, 85, 85, 85, 85, 85, 56, 52, 40, 28, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:43,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 14:34:43,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:34:43,921 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:43,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash 315074793, now seen corresponding path program 11 times [2025-03-03 14:34:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:43,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088853607] [2025-03-03 14:34:43,922 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:43,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:43,954 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2393 statements into 152 equivalence classes. [2025-03-03 14:34:43,995 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 471 of 2393 statements. [2025-03-03 14:34:43,995 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-03-03 14:34:43,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 172801 backedges. 2383 proven. 7141 refuted. 0 times theorem prover too weak. 163277 trivial. 0 not checked. [2025-03-03 14:34:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088853607] [2025-03-03 14:34:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088853607] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768547919] [2025-03-03 14:34:44,313 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:44,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:44,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 14:34:44,607 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2393 statements into 152 equivalence classes. [2025-03-03 14:34:44,687 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 471 of 2393 statements. [2025-03-03 14:34:44,687 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-03-03 14:34:44,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:44,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:44,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 172801 backedges. 66322 proven. 349 refuted. 0 times theorem prover too weak. 106130 trivial. 0 not checked. [2025-03-03 14:34:44,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 172801 backedges. 2385 proven. 7149 refuted. 0 times theorem prover too weak. 163267 trivial. 0 not checked. [2025-03-03 14:34:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768547919] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:50,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:50,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 19] total 23 [2025-03-03 14:34:50,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159728172] [2025-03-03 14:34:50,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:50,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:50,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:50,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:50,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:50,551 INFO L87 Difference]: Start difference. First operand 171 states and 253 transitions. Second operand has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 23 states have internal predecessors, (98), 17 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 13 states have call predecessors, (36), 17 states have call successors, (36) [2025-03-03 14:34:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:50,940 INFO L93 Difference]: Finished difference Result 397 states and 705 transitions. [2025-03-03 14:34:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-03 14:34:50,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 23 states have internal predecessors, (98), 17 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 13 states have call predecessors, (36), 17 states have call successors, (36) Word has length 2393 [2025-03-03 14:34:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:50,943 INFO L225 Difference]: With dead ends: 397 [2025-03-03 14:34:50,943 INFO L226 Difference]: Without dead ends: 224 [2025-03-03 14:34:50,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4819 GetRequests, 4773 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:34:50,946 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:50,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 422 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:34:50,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-03-03 14:34:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 204. [2025-03-03 14:34:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 135 states have internal predecessors, (147), 37 states have call successors, (37), 22 states have call predecessors, (37), 27 states have return successors, (118), 46 states have call predecessors, (118), 37 states have call successors, (118) [2025-03-03 14:34:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 302 transitions. [2025-03-03 14:34:50,961 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 302 transitions. Word has length 2393 [2025-03-03 14:34:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:50,961 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 302 transitions. [2025-03-03 14:34:50,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 23 states have internal predecessors, (98), 17 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (36), 13 states have call predecessors, (36), 17 states have call successors, (36) [2025-03-03 14:34:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 302 transitions. [2025-03-03 14:34:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2762 [2025-03-03 14:34:50,989 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:50,990 INFO L218 NwaCegarLoop]: trace histogram [213, 213, 190, 190, 173, 166, 106, 106, 106, 106, 106, 106, 106, 95, 95, 95, 95, 95, 95, 95, 78, 60, 40, 24, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:50,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 14:34:51,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:51,191 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:51,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:51,191 INFO L85 PathProgramCache]: Analyzing trace with hash 856554473, now seen corresponding path program 12 times [2025-03-03 14:34:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824464188] [2025-03-03 14:34:51,192 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:51,228 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 2761 statements into 163 equivalence classes. [2025-03-03 14:34:51,234 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 147 of 2761 statements. [2025-03-03 14:34:51,234 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 14:34:51,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 230825 backedges. 1409 proven. 5313 refuted. 0 times theorem prover too weak. 224103 trivial. 0 not checked. [2025-03-03 14:34:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824464188] [2025-03-03 14:34:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824464188] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907522924] [2025-03-03 14:34:51,285 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:51,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:51,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:51,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 14:34:51,600 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 2761 statements into 163 equivalence classes. [2025-03-03 14:34:51,622 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 147 of 2761 statements. [2025-03-03 14:34:51,623 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-03-03 14:34:51,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:51,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:51,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 230825 backedges. 32450 proven. 4 refuted. 0 times theorem prover too weak. 198371 trivial. 0 not checked. [2025-03-03 14:34:51,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 230825 backedges. 1409 proven. 5313 refuted. 0 times theorem prover too weak. 224103 trivial. 0 not checked. [2025-03-03 14:34:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907522924] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:57,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:57,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-03 14:34:57,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432687919] [2025-03-03 14:34:57,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:57,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 14:34:57,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:57,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 14:34:57,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-03 14:34:57,145 INFO L87 Difference]: Start difference. First operand 204 states and 302 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-03-03 14:34:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:57,215 INFO L93 Difference]: Finished difference Result 388 states and 640 transitions. [2025-03-03 14:34:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 2761 [2025-03-03 14:34:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:57,218 INFO L225 Difference]: With dead ends: 388 [2025-03-03 14:34:57,218 INFO L226 Difference]: Without dead ends: 193 [2025-03-03 14:34:57,219 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5532 GetRequests, 5517 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:57,219 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:57,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 136 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:34:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-03-03 14:34:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2025-03-03 14:34:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 128 states have internal predecessors, (141), 35 states have call successors, (35), 23 states have call predecessors, (35), 24 states have return successors, (104), 41 states have call predecessors, (104), 35 states have call successors, (104) [2025-03-03 14:34:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 280 transitions. [2025-03-03 14:34:57,238 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 280 transitions. Word has length 2761 [2025-03-03 14:34:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:57,238 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 280 transitions. [2025-03-03 14:34:57,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2025-03-03 14:34:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 280 transitions. [2025-03-03 14:34:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2314 [2025-03-03 14:34:57,316 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:57,316 INFO L218 NwaCegarLoop]: trace histogram [181, 181, 158, 158, 141, 134, 90, 90, 90, 90, 90, 90, 90, 79, 79, 79, 79, 79, 79, 79, 62, 44, 40, 24, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:57,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 14:34:57,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:57,517 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:57,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash 130528233, now seen corresponding path program 13 times [2025-03-03 14:34:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:57,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247788616] [2025-03-03 14:34:57,518 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:57,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2313 statements into 1 equivalence classes. [2025-03-03 14:34:57,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2313 of 2313 statements. [2025-03-03 14:34:57,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:57,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 161897 backedges. 1234 proven. 7402 refuted. 0 times theorem prover too weak. 153261 trivial. 0 not checked. [2025-03-03 14:35:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247788616] [2025-03-03 14:35:00,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247788616] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185974517] [2025-03-03 14:35:00,737 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:00,738 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:00,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 14:35:01,015 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2313 statements into 1 equivalence classes. [2025-03-03 14:35:01,349 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2313 of 2313 statements. [2025-03-03 14:35:01,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:01,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:01,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 5155 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:35:01,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 161897 backedges. 1261 proven. 7947 refuted. 0 times theorem prover too weak. 152689 trivial. 0 not checked. [2025-03-03 14:35:01,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 161897 backedges. 1265 proven. 7995 refuted. 0 times theorem prover too weak. 152637 trivial. 0 not checked. [2025-03-03 14:35:08,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185974517] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:08,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:08,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 23] total 28 [2025-03-03 14:35:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359504330] [2025-03-03 14:35:08,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:08,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:35:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:08,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:35:08,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:35:08,275 INFO L87 Difference]: Start difference. First operand 193 states and 280 transitions. Second operand has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-03 14:35:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:08,517 INFO L93 Difference]: Finished difference Result 251 states and 421 transitions. [2025-03-03 14:35:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:35:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) Word has length 2313 [2025-03-03 14:35:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:08,520 INFO L225 Difference]: With dead ends: 251 [2025-03-03 14:35:08,520 INFO L226 Difference]: Without dead ends: 201 [2025-03-03 14:35:08,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4657 GetRequests, 4610 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:35:08,522 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:08,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 506 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-03-03 14:35:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2025-03-03 14:35:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 128 states have internal predecessors, (141), 35 states have call successors, (35), 23 states have call predecessors, (35), 24 states have return successors, (104), 41 states have call predecessors, (104), 35 states have call successors, (104) [2025-03-03 14:35:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 280 transitions. [2025-03-03 14:35:08,534 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 280 transitions. Word has length 2313 [2025-03-03 14:35:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:08,534 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 280 transitions. [2025-03-03 14:35:08,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 28 states have internal predecessors, (91), 22 states have call successors, (28), 1 states have call predecessors, (28), 11 states have return successors, (35), 14 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-03 14:35:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 280 transitions. [2025-03-03 14:35:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2094 [2025-03-03 14:35:08,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:08,552 INFO L218 NwaCegarLoop]: trace histogram [157, 157, 150, 150, 126, 121, 78, 78, 78, 78, 78, 78, 78, 75, 75, 75, 75, 75, 75, 75, 48, 46, 36, 24, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:08,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 14:35:08,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:08,752 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:08,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash -780330457, now seen corresponding path program 14 times [2025-03-03 14:35:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:08,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833492972] [2025-03-03 14:35:08,753 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:08,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2093 statements into 2 equivalence classes. [2025-03-03 14:35:08,945 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2093 of 2093 statements. [2025-03-03 14:35:08,945 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:08,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 131931 backedges. 1310 proven. 5623 refuted. 0 times theorem prover too weak. 124998 trivial. 0 not checked. [2025-03-03 14:35:11,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833492972] [2025-03-03 14:35:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833492972] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417168847] [2025-03-03 14:35:11,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:11,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:11,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:11,283 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:11,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 14:35:11,614 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2093 statements into 2 equivalence classes. [2025-03-03 14:35:11,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2093 of 2093 statements. [2025-03-03 14:35:11,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:11,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:11,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 4667 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:35:11,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 131931 backedges. 1423 proven. 6893 refuted. 0 times theorem prover too weak. 123615 trivial. 0 not checked. [2025-03-03 14:35:12,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 131931 backedges. 1425 proven. 6943 refuted. 0 times theorem prover too weak. 123563 trivial. 0 not checked. [2025-03-03 14:35:18,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417168847] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:18,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:18,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 29 [2025-03-03 14:35:18,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148965953] [2025-03-03 14:35:18,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:18,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:35:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:18,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:35:18,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:35:18,447 INFO L87 Difference]: Start difference. First operand 193 states and 280 transitions. Second operand has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 22 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 16 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-03 14:35:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:18,667 INFO L93 Difference]: Finished difference Result 239 states and 386 transitions. [2025-03-03 14:35:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:35:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 22 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 16 states have call predecessors, (37), 22 states have call successors, (37) Word has length 2093 [2025-03-03 14:35:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:18,670 INFO L225 Difference]: With dead ends: 239 [2025-03-03 14:35:18,671 INFO L226 Difference]: Without dead ends: 193 [2025-03-03 14:35:18,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4215 GetRequests, 4167 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:35:18,673 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:18,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 577 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2025-03-03 14:35:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2025-03-03 14:35:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 133 states have (on average 1.0601503759398496) internal successors, (141), 128 states have internal predecessors, (141), 35 states have call successors, (35), 23 states have call predecessors, (35), 24 states have return successors, (95), 41 states have call predecessors, (95), 35 states have call successors, (95) [2025-03-03 14:35:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2025-03-03 14:35:18,686 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 2093 [2025-03-03 14:35:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:18,686 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2025-03-03 14:35:18,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 22 states have call successors, (29), 1 states have call predecessors, (29), 12 states have return successors, (37), 16 states have call predecessors, (37), 22 states have call successors, (37) [2025-03-03 14:35:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2025-03-03 14:35:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1781 [2025-03-03 14:35:18,699 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:18,700 INFO L218 NwaCegarLoop]: trace histogram [133, 133, 128, 128, 105, 105, 66, 66, 66, 66, 66, 66, 66, 64, 64, 64, 64, 64, 64, 64, 41, 39, 28, 23, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:18,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 14:35:18,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 14:35:18,901 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:18,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1497421952, now seen corresponding path program 15 times [2025-03-03 14:35:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776315367] [2025-03-03 14:35:18,901 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:18,927 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1780 statements into 114 equivalence classes. [2025-03-03 14:35:18,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 159 of 1780 statements. [2025-03-03 14:35:18,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:35:18,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 95188 backedges. 4752 proven. 94 refuted. 0 times theorem prover too weak. 90342 trivial. 0 not checked. [2025-03-03 14:35:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776315367] [2025-03-03 14:35:19,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776315367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709333090] [2025-03-03 14:35:19,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:19,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:19,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:19,045 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 14:35:19,378 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1780 statements into 114 equivalence classes. [2025-03-03 14:35:19,407 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 159 of 1780 statements. [2025-03-03 14:35:19,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:35:19,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:19,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:19,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 95188 backedges. 5233 proven. 96 refuted. 0 times theorem prover too weak. 89859 trivial. 0 not checked. [2025-03-03 14:35:19,490 INFO L312 TraceCheckSpWp]: Computing backward predicates...