./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/half_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 17:50:44,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 17:50:44,731 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 17:50:44,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 17:50:44,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 17:50:44,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 17:50:44,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 17:50:44,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 17:50:44,757 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 17:50:44,757 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 17:50:44,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 17:50:44,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 17:50:44,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 17:50:44,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 17:50:44,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 17:50:44,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 17:50:44,760 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 17:50:44,760 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:50:44,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 17:50:44,761 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 17:50:44,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 17:50:44,762 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 -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2025-03-16 17:50:44,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 17:50:44,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 17:50:44,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 17:50:44,983 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 17:50:44,983 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 17:50:44,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/half_2.i [2025-03-16 17:50:46,125 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7862f97e/71c8964ebfa643ffb903f1c63c4bdf06/FLAG002a5b400 [2025-03-16 17:50:46,356 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 17:50:46,356 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i [2025-03-16 17:50:46,363 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7862f97e/71c8964ebfa643ffb903f1c63c4bdf06/FLAG002a5b400 [2025-03-16 17:50:46,379 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7862f97e/71c8964ebfa643ffb903f1c63c4bdf06 [2025-03-16 17:50:46,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 17:50:46,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 17:50:46,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 17:50:46,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 17:50:46,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 17:50:46,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea2bf9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46, skipping insertion in model container [2025-03-16 17:50:46,390 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,400 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 17:50:46,502 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2025-03-16 17:50:46,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:50:46,520 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 17:50:46,528 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2025-03-16 17:50:46,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 17:50:46,539 INFO L204 MainTranslator]: Completed translation [2025-03-16 17:50:46,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46 WrapperNode [2025-03-16 17:50:46,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 17:50:46,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 17:50:46,541 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 17:50:46,541 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 17:50:46,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,560 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2025-03-16 17:50:46,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 17:50:46,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 17:50:46,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 17:50:46,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 17:50:46,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,566 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,573 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]. [2025-03-16 17:50:46,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,575 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 17:50:46,578 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 17:50:46,578 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 17:50:46,578 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 17:50:46,579 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (1/1) ... [2025-03-16 17:50:46,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 17:50:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:46,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-16 17:50:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-16 17:50:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 17:50:46,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 17:50:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 17:50:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 17:50:46,650 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 17:50:46,651 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 17:50:46,727 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-03-16 17:50:46,727 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 17:50:46,732 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 17:50:46,733 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 17:50:46,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:50:46 BoogieIcfgContainer [2025-03-16 17:50:46,733 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 17:50:46,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 17:50:46,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 17:50:46,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 17:50:46,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 05:50:46" (1/3) ... [2025-03-16 17:50:46,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6a289d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:50:46, skipping insertion in model container [2025-03-16 17:50:46,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 05:50:46" (2/3) ... [2025-03-16 17:50:46,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6a289d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 05:50:46, skipping insertion in model container [2025-03-16 17:50:46,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 05:50:46" (3/3) ... [2025-03-16 17:50:46,739 INFO L128 eAbstractionObserver]: Analyzing ICFG half_2.i [2025-03-16 17:50:46,750 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 17:50:46,751 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG half_2.i that has 1 procedures, 11 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-16 17:50:46,781 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 17:50:46,788 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;@101f60b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 17:50:46,790 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 17:50:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-16 17:50:46,796 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:46,797 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-16 17:50:46,797 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:46,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1359698910, now seen corresponding path program 1 times [2025-03-16 17:50:46,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:46,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155113747] [2025-03-16 17:50:46,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:46,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-16 17:50:46,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-16 17:50:46,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:46,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:47,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155113747] [2025-03-16 17:50:47,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155113747] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:50:47,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 17:50:47,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 17:50:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350767121] [2025-03-16 17:50:47,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:50:47,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 17:50:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:47,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 17:50:47,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 17:50:47,118 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:47,171 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2025-03-16 17:50:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 17:50:47,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-16 17:50:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:47,177 INFO L225 Difference]: With dead ends: 23 [2025-03-16 17:50:47,177 INFO L226 Difference]: Without dead ends: 12 [2025-03-16 17:50:47,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-16 17:50:47,181 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:47,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2025-03-16 17:50:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2025-03-16 17:50:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-03-16 17:50:47,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2025-03-16 17:50:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:47,202 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-03-16 17:50:47,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-03-16 17:50:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 17:50:47,203 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:47,203 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:50:47,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 17:50:47,204 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:47,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -798051480, now seen corresponding path program 1 times [2025-03-16 17:50:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:47,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423304028] [2025-03-16 17:50:47,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:47,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 17:50:47,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 17:50:47,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:47,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423304028] [2025-03-16 17:50:47,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423304028] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943934069] [2025-03-16 17:50:47,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:47,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:47,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:47,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:47,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 17:50:47,396 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 17:50:47,403 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 17:50:47,403 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:47,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:47,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 17:50:47,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,542 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:47,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943934069] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:47,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:47,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-16 17:50:47,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374708079] [2025-03-16 17:50:47,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:47,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-16 17:50:47,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:47,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-16 17:50:47,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-16 17:50:47,706 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:47,859 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2025-03-16 17:50:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 17:50:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 17:50:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:47,860 INFO L225 Difference]: With dead ends: 23 [2025-03-16 17:50:47,861 INFO L226 Difference]: Without dead ends: 21 [2025-03-16 17:50:47,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-03-16 17:50:47,861 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:47,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-16 17:50:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2025-03-16 17:50:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2025-03-16 17:50:47,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2025-03-16 17:50:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:47,865 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2025-03-16 17:50:47,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2025-03-16 17:50:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 17:50:47,866 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:47,866 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:50:47,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 17:50:48,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:48,066 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:48,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash 954531052, now seen corresponding path program 1 times [2025-03-16 17:50:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577068500] [2025-03-16 17:50:48,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:48,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 17:50:48,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:50:48,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:48,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577068500] [2025-03-16 17:50:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577068500] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300327306] [2025-03-16 17:50:48,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:48,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:48,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 17:50:48,200 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-16 17:50:48,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:50:48,206 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:48,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 17:50:48,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,235 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 17:50:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300327306] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 17:50:48,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 17:50:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-03-16 17:50:48,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255128767] [2025-03-16 17:50:48,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 17:50:48,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 17:50:48,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:48,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 17:50:48,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 17:50:48,236 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:48,283 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-03-16 17:50:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 17:50:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 17:50:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:48,284 INFO L225 Difference]: With dead ends: 23 [2025-03-16 17:50:48,284 INFO L226 Difference]: Without dead ends: 16 [2025-03-16 17:50:48,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-16 17:50:48,285 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:48,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 17:50:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-03-16 17:50:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2025-03-16 17:50:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-03-16 17:50:48,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2025-03-16 17:50:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:48,287 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-03-16 17:50:48,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-03-16 17:50:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-16 17:50:48,289 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:48,290 INFO L218 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2025-03-16 17:50:48,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-16 17:50:48,490 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,SelfDestructingSolverStorable2 [2025-03-16 17:50:48,490 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:48,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1902242344, now seen corresponding path program 2 times [2025-03-16 17:50:48,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:48,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399876142] [2025-03-16 17:50:48,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:48,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:48,494 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-03-16 17:50:48,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:50:48,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:48,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399876142] [2025-03-16 17:50:48,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399876142] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910857819] [2025-03-16 17:50:48,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:48,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:48,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:48,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 17:50:48,607 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-03-16 17:50:48,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-03-16 17:50:48,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:48,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:48,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 17:50:48,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:48,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910857819] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:48,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:48,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-03-16 17:50:48,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735703862] [2025-03-16 17:50:48,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:48,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-16 17:50:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:48,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-16 17:50:48,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-16 17:50:48,733 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:48,830 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2025-03-16 17:50:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 17:50:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-16 17:50:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:48,831 INFO L225 Difference]: With dead ends: 26 [2025-03-16 17:50:48,831 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 17:50:48,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2025-03-16 17:50:48,832 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:48,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 17:50:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2025-03-16 17:50:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2025-03-16 17:50:48,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2025-03-16 17:50:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:48,837 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2025-03-16 17:50:48,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2025-03-16 17:50:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 17:50:48,838 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:48,838 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 17:50:48,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:49,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:49,039 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:49,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:49,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1776649132, now seen corresponding path program 1 times [2025-03-16 17:50:49,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:49,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235798644] [2025-03-16 17:50:49,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:49,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:49,043 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 17:50:49,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 17:50:49,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:49,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235798644] [2025-03-16 17:50:49,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235798644] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:49,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385245966] [2025-03-16 17:50:49,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 17:50:49,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:49,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:49,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 17:50:49,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 17:50:49,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 17:50:49,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:49,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:49,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-16 17:50:49,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:49,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385245966] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:49,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:49,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-03-16 17:50:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504942298] [2025-03-16 17:50:49,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:49,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-16 17:50:49,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:49,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-16 17:50:49,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-16 17:50:49,569 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:49,883 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2025-03-16 17:50:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 17:50:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 17:50:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:49,884 INFO L225 Difference]: With dead ends: 40 [2025-03-16 17:50:49,884 INFO L226 Difference]: Without dead ends: 24 [2025-03-16 17:50:49,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2025-03-16 17:50:49,885 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:49,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 33 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-16 17:50:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2025-03-16 17:50:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2025-03-16 17:50:49,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2025-03-16 17:50:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:49,888 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2025-03-16 17:50:49,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2025-03-16 17:50:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-16 17:50:49,888 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:49,888 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 17:50:49,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:50,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:50,092 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:50,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -421312536, now seen corresponding path program 2 times [2025-03-16 17:50:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:50,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020532018] [2025-03-16 17:50:50,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:50,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:50,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-16 17:50:50,100 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:50:50,100 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:50,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:50,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020532018] [2025-03-16 17:50:50,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020532018] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:50,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12188506] [2025-03-16 17:50:50,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:50,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:50,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:50,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:50,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 17:50:50,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-16 17:50:50,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-16 17:50:50,272 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:50,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:50,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-16 17:50:50,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12188506] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:50,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:50,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2025-03-16 17:50:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836496499] [2025-03-16 17:50:50,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:50,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-16 17:50:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:50,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-16 17:50:50,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2025-03-16 17:50:50,649 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:50,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:50,958 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2025-03-16 17:50:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-16 17:50:50,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-03-16 17:50:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:50,959 INFO L225 Difference]: With dead ends: 43 [2025-03-16 17:50:50,959 INFO L226 Difference]: Without dead ends: 29 [2025-03-16 17:50:50,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:50:50,960 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:50,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-16 17:50:50,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2025-03-16 17:50:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2025-03-16 17:50:50,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2025-03-16 17:50:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:50,966 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2025-03-16 17:50:50,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2025-03-16 17:50:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 17:50:50,967 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:50,967 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 17:50:50,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:51,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:51,168 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:51,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1203008812, now seen corresponding path program 3 times [2025-03-16 17:50:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:51,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841157626] [2025-03-16 17:50:51,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:51,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:51,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 4 equivalence classes. [2025-03-16 17:50:51,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:50:51,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 17:50:51,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841157626] [2025-03-16 17:50:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841157626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721428473] [2025-03-16 17:50:51,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:50:51,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:51,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:51,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 17:50:51,395 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 4 equivalence classes. [2025-03-16 17:50:51,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:50:51,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-16 17:50:51,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:51,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-16 17:50:51,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721428473] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:51,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:51,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 33 [2025-03-16 17:50:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884426292] [2025-03-16 17:50:51,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:51,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-16 17:50:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:51,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-16 17:50:51,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2025-03-16 17:50:51,992 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:52,380 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2025-03-16 17:50:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-16 17:50:52,381 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 17:50:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:52,382 INFO L225 Difference]: With dead ends: 61 [2025-03-16 17:50:52,382 INFO L226 Difference]: Without dead ends: 44 [2025-03-16 17:50:52,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2025-03-16 17:50:52,383 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:52,384 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-03-16 17:50:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2025-03-16 17:50:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2025-03-16 17:50:52,394 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2025-03-16 17:50:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:52,394 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2025-03-16 17:50:52,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2025-03-16 17:50:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 17:50:52,394 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:52,394 INFO L218 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 17:50:52,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 17:50:52,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:52,595 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:52,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1107196568, now seen corresponding path program 4 times [2025-03-16 17:50:52,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:52,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691872989] [2025-03-16 17:50:52,596 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:52,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:52,600 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:50:52,606 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:50:52,606 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:52,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:52,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:52,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691872989] [2025-03-16 17:50:52,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691872989] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:52,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370274254] [2025-03-16 17:50:52,741 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:50:52,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:52,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:52,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:50:52,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 17:50:52,766 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-16 17:50:52,775 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 17:50:52,775 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:50:52,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:52,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-16 17:50:52,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:52,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370274254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:53,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:53,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2025-03-16 17:50:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949889528] [2025-03-16 17:50:53,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:53,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-16 17:50:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:53,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-16 17:50:53,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2025-03-16 17:50:53,032 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:53,218 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2025-03-16 17:50:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-16 17:50:53,219 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2025-03-16 17:50:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:53,219 INFO L225 Difference]: With dead ends: 70 [2025-03-16 17:50:53,219 INFO L226 Difference]: Without dead ends: 68 [2025-03-16 17:50:53,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=393, Invalid=1413, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 17:50:53,220 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:53,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 17:50:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-16 17:50:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 32. [2025-03-16 17:50:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2025-03-16 17:50:53,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2025-03-16 17:50:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:53,229 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2025-03-16 17:50:53,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2025-03-16 17:50:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 17:50:53,229 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:53,229 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 17:50:53,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:53,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:53,430 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:53,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash -259802008, now seen corresponding path program 5 times [2025-03-16 17:50:53,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:53,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126534829] [2025-03-16 17:50:53,430 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:53,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:53,434 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 5 equivalence classes. [2025-03-16 17:50:53,442 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 17:50:53,442 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 17:50:53,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126534829] [2025-03-16 17:50:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126534829] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484058683] [2025-03-16 17:50:53,719 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:50:53,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:53,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:53,720 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) [2025-03-16 17:50:53,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 17:50:53,742 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 5 equivalence classes. [2025-03-16 17:50:53,752 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 23 of 23 statements. [2025-03-16 17:50:53,752 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-16 17:50:53,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:53,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-16 17:50:53,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:53,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:54,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484058683] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:54,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:54,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2025-03-16 17:50:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220424040] [2025-03-16 17:50:54,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:54,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 17:50:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:54,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 17:50:54,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2025-03-16 17:50:54,265 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:54,771 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2025-03-16 17:50:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-16 17:50:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 17:50:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:54,771 INFO L225 Difference]: With dead ends: 86 [2025-03-16 17:50:54,771 INFO L226 Difference]: Without dead ends: 66 [2025-03-16 17:50:54,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2025-03-16 17:50:54,772 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:54,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:50:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-16 17:50:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 32. [2025-03-16 17:50:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2025-03-16 17:50:54,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2025-03-16 17:50:54,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:54,778 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2025-03-16 17:50:54,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2025-03-16 17:50:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-16 17:50:54,778 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:54,778 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2025-03-16 17:50:54,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 17:50:54,978 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,SelfDestructingSolverStorable8 [2025-03-16 17:50:54,979 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:54,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1474984276, now seen corresponding path program 6 times [2025-03-16 17:50:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:54,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014244655] [2025-03-16 17:50:54,979 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:54,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:54,986 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 6 equivalence classes. [2025-03-16 17:50:54,995 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:50:54,995 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 17:50:54,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014244655] [2025-03-16 17:50:55,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014244655] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:55,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005592854] [2025-03-16 17:50:55,231 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:50:55,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:55,233 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) [2025-03-16 17:50:55,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 17:50:55,255 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 6 equivalence classes. [2025-03-16 17:50:55,266 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-03-16 17:50:55,266 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2025-03-16 17:50:55,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:55,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 17:50:55,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:55,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005592854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:56,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:56,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 51 [2025-03-16 17:50:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017437109] [2025-03-16 17:50:56,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:56,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-16 17:50:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:56,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-16 17:50:56,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2025-03-16 17:50:56,308 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:57,015 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2025-03-16 17:50:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 17:50:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2025-03-16 17:50:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:57,019 INFO L225 Difference]: With dead ends: 56 [2025-03-16 17:50:57,019 INFO L226 Difference]: Without dead ends: 33 [2025-03-16 17:50:57,020 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=645, Invalid=4467, Unknown=0, NotChecked=0, Total=5112 [2025-03-16 17:50:57,020 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:57,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:50:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-16 17:50:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2025-03-16 17:50:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2025-03-16 17:50:57,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2025-03-16 17:50:57,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:57,026 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2025-03-16 17:50:57,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 51 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:57,026 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2025-03-16 17:50:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 17:50:57,026 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:57,026 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1] [2025-03-16 17:50:57,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-16 17:50:57,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-16 17:50:57,227 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:57,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 329781480, now seen corresponding path program 7 times [2025-03-16 17:50:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:57,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689456926] [2025-03-16 17:50:57,228 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:57,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 17:50:57,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 17:50:57,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:57,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:57,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689456926] [2025-03-16 17:50:57,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689456926] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384318268] [2025-03-16 17:50:57,639 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:50:57,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:57,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:57,641 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) [2025-03-16 17:50:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 17:50:57,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 17:50:57,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 17:50:57,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:50:57,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:57,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 17:50:57,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:50:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:57,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:50:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:58,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384318268] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:50:58,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:50:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2025-03-16 17:50:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988271414] [2025-03-16 17:50:58,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:50:58,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-16 17:50:58,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:50:58,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-16 17:50:58,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2025-03-16 17:50:58,419 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:50:59,183 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2025-03-16 17:50:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-16 17:50:59,184 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2025-03-16 17:50:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:50:59,184 INFO L225 Difference]: With dead ends: 87 [2025-03-16 17:50:59,184 INFO L226 Difference]: Without dead ends: 61 [2025-03-16 17:50:59,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=649, Invalid=3511, Unknown=0, NotChecked=0, Total=4160 [2025-03-16 17:50:59,185 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:50:59,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 74 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:50:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-16 17:50:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2025-03-16 17:50:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2025-03-16 17:50:59,195 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 31 [2025-03-16 17:50:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:50:59,195 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2025-03-16 17:50:59,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 43 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:50:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2025-03-16 17:50:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 17:50:59,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:50:59,196 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1] [2025-03-16 17:50:59,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 17:50:59,396 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,SelfDestructingSolverStorable10 [2025-03-16 17:50:59,396 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:50:59,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:50:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1001437228, now seen corresponding path program 8 times [2025-03-16 17:50:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:50:59,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476997170] [2025-03-16 17:50:59,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:59,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:50:59,400 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-16 17:50:59,406 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 17:50:59,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:59,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:50:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:50:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476997170] [2025-03-16 17:50:59,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476997170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:50:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060867819] [2025-03-16 17:50:59,662 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:50:59,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:50:59,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:50:59,664 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) [2025-03-16 17:50:59,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 17:50:59,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-16 17:50:59,706 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 17:50:59,707 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:50:59,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:50:59,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-16 17:50:59,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:00,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:00,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060867819] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:00,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:00,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2025-03-16 17:51:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537299530] [2025-03-16 17:51:00,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:00,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-03-16 17:51:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:00,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-03-16 17:51:00,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2025-03-16 17:51:00,640 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 55 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:01,675 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2025-03-16 17:51:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-16 17:51:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-16 17:51:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:01,676 INFO L225 Difference]: With dead ends: 117 [2025-03-16 17:51:01,676 INFO L226 Difference]: Without dead ends: 88 [2025-03-16 17:51:01,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=5477, Unknown=0, NotChecked=0, Total=6480 [2025-03-16 17:51:01,678 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:01,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 17:51:01,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-16 17:51:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2025-03-16 17:51:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2025-03-16 17:51:01,694 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 35 [2025-03-16 17:51:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:01,695 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2025-03-16 17:51:01,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2025-03-16 17:51:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 17:51:01,697 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:01,697 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1] [2025-03-16 17:51:01,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 17:51:01,901 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,SelfDestructingSolverStorable11 [2025-03-16 17:51:01,901 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:01,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1800911512, now seen corresponding path program 9 times [2025-03-16 17:51:01,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:01,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609603325] [2025-03-16 17:51:01,902 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:01,905 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 9 equivalence classes. [2025-03-16 17:51:01,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 17:51:01,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 17:51:01,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609603325] [2025-03-16 17:51:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609603325] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384080455] [2025-03-16 17:51:02,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:02,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:02,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:02,262 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) [2025-03-16 17:51:02,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 17:51:02,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 9 equivalence classes. [2025-03-16 17:51:02,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 17:51:02,308 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-16 17:51:02,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:02,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 17:51:02,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:02,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:03,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384080455] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:03,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 24] total 64 [2025-03-16 17:51:03,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888137443] [2025-03-16 17:51:03,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:03,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2025-03-16 17:51:03,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:03,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2025-03-16 17:51:03,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3471, Unknown=0, NotChecked=0, Total=4032 [2025-03-16 17:51:03,608 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:04,908 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2025-03-16 17:51:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-03-16 17:51:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-16 17:51:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:04,910 INFO L225 Difference]: With dead ends: 150 [2025-03-16 17:51:04,910 INFO L226 Difference]: Without dead ends: 118 [2025-03-16 17:51:04,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1265, Invalid=7665, Unknown=0, NotChecked=0, Total=8930 [2025-03-16 17:51:04,912 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:04,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 146 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 17:51:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-16 17:51:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2025-03-16 17:51:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 95 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2025-03-16 17:51:04,942 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 39 [2025-03-16 17:51:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:04,942 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2025-03-16 17:51:04,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2025-03-16 17:51:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 17:51:04,943 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:04,943 INFO L218 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1] [2025-03-16 17:51:04,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-16 17:51:05,143 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,SelfDestructingSolverStorable12 [2025-03-16 17:51:05,144 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:05,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1733047320, now seen corresponding path program 10 times [2025-03-16 17:51:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541403665] [2025-03-16 17:51:05,144 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:05,147 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-16 17:51:05,157 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 17:51:05,157 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:05,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 105 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:05,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:05,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541403665] [2025-03-16 17:51:05,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541403665] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:05,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679516546] [2025-03-16 17:51:05,484 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:05,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:05,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:05,486 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) [2025-03-16 17:51:05,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 17:51:05,514 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-16 17:51:05,531 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 17:51:05,531 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:05,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:05,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-16 17:51:05,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:05,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:06,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679516546] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:06,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:06,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2025-03-16 17:51:06,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466093233] [2025-03-16 17:51:06,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:06,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2025-03-16 17:51:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:06,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2025-03-16 17:51:06,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3044, Unknown=0, NotChecked=0, Total=3906 [2025-03-16 17:51:06,163 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 63 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 63 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:06,646 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2025-03-16 17:51:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-16 17:51:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 63 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2025-03-16 17:51:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:06,647 INFO L225 Difference]: With dead ends: 250 [2025-03-16 17:51:06,647 INFO L226 Difference]: Without dead ends: 248 [2025-03-16 17:51:06,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1615, Invalid=6575, Unknown=0, NotChecked=0, Total=8190 [2025-03-16 17:51:06,649 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:06,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 17:51:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-03-16 17:51:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 64. [2025-03-16 17:51:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2025-03-16 17:51:06,669 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 39 [2025-03-16 17:51:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:06,669 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2025-03-16 17:51:06,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 63 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2025-03-16 17:51:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-16 17:51:06,670 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:06,670 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1] [2025-03-16 17:51:06,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-16 17:51:06,870 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,SelfDestructingSolverStorable13 [2025-03-16 17:51:06,871 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:06,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash -718403156, now seen corresponding path program 11 times [2025-03-16 17:51:06,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:06,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867775856] [2025-03-16 17:51:06,871 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:06,875 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 10 equivalence classes. [2025-03-16 17:51:06,886 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 17:51:06,886 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 17:51:06,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 52 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867775856] [2025-03-16 17:51:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867775856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383627817] [2025-03-16 17:51:07,461 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:07,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:07,463 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) [2025-03-16 17:51:07,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 17:51:07,489 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 43 statements into 10 equivalence classes. [2025-03-16 17:51:07,509 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 43 of 43 statements. [2025-03-16 17:51:07,509 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-16 17:51:07,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:07,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-16 17:51:07,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:08,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:09,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383627817] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:09,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:09,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 70 [2025-03-16 17:51:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471066851] [2025-03-16 17:51:09,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:09,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2025-03-16 17:51:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:09,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2025-03-16 17:51:09,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2025-03-16 17:51:09,170 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 70 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 70 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:11,287 INFO L93 Difference]: Finished difference Result 255 states and 268 transitions. [2025-03-16 17:51:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-03-16 17:51:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 70 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2025-03-16 17:51:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:11,288 INFO L225 Difference]: With dead ends: 255 [2025-03-16 17:51:11,288 INFO L226 Difference]: Without dead ends: 220 [2025-03-16 17:51:11,289 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1579, Invalid=11303, Unknown=0, NotChecked=0, Total=12882 [2025-03-16 17:51:11,290 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:11,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 165 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 17:51:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-03-16 17:51:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 64. [2025-03-16 17:51:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2025-03-16 17:51:11,312 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 43 [2025-03-16 17:51:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:11,312 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2025-03-16 17:51:11,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.7714285714285714) internal successors, (124), 70 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2025-03-16 17:51:11,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-16 17:51:11,314 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:11,314 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1] [2025-03-16 17:51:11,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-16 17:51:11,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:11,517 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:11,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:11,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1440504296, now seen corresponding path program 12 times [2025-03-16 17:51:11,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:11,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918821265] [2025-03-16 17:51:11,517 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:11,523 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 11 equivalence classes. [2025-03-16 17:51:11,546 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 17:51:11,546 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-16 17:51:11,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:11,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:11,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918821265] [2025-03-16 17:51:11,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918821265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:11,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886708295] [2025-03-16 17:51:11,934 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:11,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:11,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:11,936 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) [2025-03-16 17:51:11,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-16 17:51:11,962 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 47 statements into 11 equivalence classes. [2025-03-16 17:51:11,981 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 47 of 47 statements. [2025-03-16 17:51:11,981 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-16 17:51:11,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:11,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-03-16 17:51:11,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:12,543 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886708295] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:13,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:13,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 77 [2025-03-16 17:51:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441976947] [2025-03-16 17:51:13,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:13,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2025-03-16 17:51:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:13,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2025-03-16 17:51:13,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=5218, Unknown=0, NotChecked=0, Total=5852 [2025-03-16 17:51:13,841 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 77 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 77 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:14,735 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2025-03-16 17:51:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-16 17:51:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 77 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2025-03-16 17:51:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:14,736 INFO L225 Difference]: With dead ends: 102 [2025-03-16 17:51:14,736 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 17:51:14,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=951, Invalid=8555, Unknown=0, NotChecked=0, Total=9506 [2025-03-16 17:51:14,737 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:14,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 352 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-16 17:51:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 17:51:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-16 17:51:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2025-03-16 17:51:14,756 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 47 [2025-03-16 17:51:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:14,756 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2025-03-16 17:51:14,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 77 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2025-03-16 17:51:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-16 17:51:14,756 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:14,757 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1] [2025-03-16 17:51:14,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-16 17:51:14,957 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,SelfDestructingSolverStorable15 [2025-03-16 17:51:14,957 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:14,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash -382371028, now seen corresponding path program 13 times [2025-03-16 17:51:14,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:14,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447649659] [2025-03-16 17:51:14,958 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:14,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 17:51:14,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 17:51:14,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:14,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:15,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447649659] [2025-03-16 17:51:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447649659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959103360] [2025-03-16 17:51:15,662 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:15,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:15,664 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) [2025-03-16 17:51:15,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-16 17:51:15,694 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-16 17:51:15,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-16 17:51:15,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:15,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:15,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-16 17:51:15,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:16,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:17,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959103360] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:17,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:17,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2025-03-16 17:51:17,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777227664] [2025-03-16 17:51:17,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:17,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2025-03-16 17:51:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:17,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2025-03-16 17:51:17,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2025-03-16 17:51:17,268 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:19,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:19,381 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2025-03-16 17:51:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-16 17:51:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2025-03-16 17:51:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:19,382 INFO L225 Difference]: With dead ends: 223 [2025-03-16 17:51:19,382 INFO L226 Difference]: Without dead ends: 182 [2025-03-16 17:51:19,383 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1654, Invalid=9266, Unknown=0, NotChecked=0, Total=10920 [2025-03-16 17:51:19,383 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:19,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 196 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-16 17:51:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2025-03-16 17:51:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 64. [2025-03-16 17:51:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2025-03-16 17:51:19,402 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 51 [2025-03-16 17:51:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:19,402 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2025-03-16 17:51:19,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2025-03-16 17:51:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-03-16 17:51:19,403 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:19,403 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1] [2025-03-16 17:51:19,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:19,603 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,SelfDestructingSolverStorable16 [2025-03-16 17:51:19,603 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:19,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1469861480, now seen corresponding path program 14 times [2025-03-16 17:51:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:19,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813950402] [2025-03-16 17:51:19,604 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:19,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:19,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-16 17:51:19,622 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 17:51:19,622 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:19,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813950402] [2025-03-16 17:51:20,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813950402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105076681] [2025-03-16 17:51:20,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:20,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:20,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:20,046 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) [2025-03-16 17:51:20,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-16 17:51:20,077 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 55 statements into 2 equivalence classes. [2025-03-16 17:51:20,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 55 of 55 statements. [2025-03-16 17:51:20,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:20,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:20,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-16 17:51:20,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:20,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105076681] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:21,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2025-03-16 17:51:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306017168] [2025-03-16 17:51:21,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:21,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-03-16 17:51:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:21,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-03-16 17:51:21,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1073, Invalid=6067, Unknown=0, NotChecked=0, Total=7140 [2025-03-16 17:51:21,834 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 85 states, 85 states have (on average 1.8823529411764706) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:24,208 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2025-03-16 17:51:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-03-16 17:51:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.8823529411764706) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2025-03-16 17:51:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:24,209 INFO L225 Difference]: With dead ends: 198 [2025-03-16 17:51:24,209 INFO L226 Difference]: Without dead ends: 154 [2025-03-16 17:51:24,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5545 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2383, Invalid=13367, Unknown=0, NotChecked=0, Total=15750 [2025-03-16 17:51:24,210 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:24,210 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 220 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-16 17:51:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-16 17:51:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 64. [2025-03-16 17:51:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2025-03-16 17:51:24,230 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2025-03-16 17:51:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:24,230 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2025-03-16 17:51:24,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.8823529411764706) internal successors, (160), 85 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2025-03-16 17:51:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-16 17:51:24,230 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:24,230 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1] [2025-03-16 17:51:24,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-16 17:51:24,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-16 17:51:24,431 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:24,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:24,431 INFO L85 PathProgramCache]: Analyzing trace with hash 242158764, now seen corresponding path program 15 times [2025-03-16 17:51:24,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:24,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669660984] [2025-03-16 17:51:24,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:24,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:24,436 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 14 equivalence classes. [2025-03-16 17:51:24,455 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 17:51:24,455 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-16 17:51:24,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:25,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669660984] [2025-03-16 17:51:25,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669660984] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761549220] [2025-03-16 17:51:25,022 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:51:25,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:25,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:25,024 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) [2025-03-16 17:51:25,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-16 17:51:25,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 14 equivalence classes. [2025-03-16 17:51:25,080 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 59 of 59 statements. [2025-03-16 17:51:25,080 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-16 17:51:25,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:25,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-16 17:51:25,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:25,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:26,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761549220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:26,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:26,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 92 [2025-03-16 17:51:26,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115379753] [2025-03-16 17:51:26,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:26,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2025-03-16 17:51:26,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:26,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2025-03-16 17:51:26,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=7244, Unknown=0, NotChecked=0, Total=8372 [2025-03-16 17:51:26,954 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 92 states, 92 states have (on average 1.8695652173913044) internal successors, (172), 92 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:27,612 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2025-03-16 17:51:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-16 17:51:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.8695652173913044) internal successors, (172), 92 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2025-03-16 17:51:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:27,613 INFO L225 Difference]: With dead ends: 111 [2025-03-16 17:51:27,613 INFO L226 Difference]: Without dead ends: 64 [2025-03-16 17:51:27,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1436, Invalid=10120, Unknown=0, NotChecked=0, Total=11556 [2025-03-16 17:51:27,614 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:27,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 381 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 17:51:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-16 17:51:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-16 17:51:27,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2025-03-16 17:51:27,646 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2025-03-16 17:51:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:27,646 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2025-03-16 17:51:27,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.8695652173913044) internal successors, (172), 92 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2025-03-16 17:51:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2025-03-16 17:51:27,647 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:27,647 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1] [2025-03-16 17:51:27,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-16 17:51:27,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:27,847 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:27,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:27,848 INFO L85 PathProgramCache]: Analyzing trace with hash 943727336, now seen corresponding path program 16 times [2025-03-16 17:51:27,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:27,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223430756] [2025-03-16 17:51:27,848 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:27,853 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 63 statements into 2 equivalence classes. [2025-03-16 17:51:27,863 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 17:51:27,863 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:27,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 273 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:28,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223430756] [2025-03-16 17:51:28,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223430756] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:28,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976094304] [2025-03-16 17:51:28,870 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:51:28,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:28,871 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) [2025-03-16 17:51:28,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-16 17:51:28,905 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 63 statements into 2 equivalence classes. [2025-03-16 17:51:28,923 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-03-16 17:51:28,923 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:51:28,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:28,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-03-16 17:51:28,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:29,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976094304] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:31,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:31,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 98 [2025-03-16 17:51:31,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157275936] [2025-03-16 17:51:31,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:31,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2025-03-16 17:51:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:31,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2025-03-16 17:51:31,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=8075, Unknown=0, NotChecked=0, Total=9506 [2025-03-16 17:51:31,235 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 98 states, 98 states have (on average 1.8775510204081634) internal successors, (184), 98 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:34,412 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2025-03-16 17:51:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2025-03-16 17:51:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.8775510204081634) internal successors, (184), 98 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2025-03-16 17:51:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:34,413 INFO L225 Difference]: With dead ends: 175 [2025-03-16 17:51:34,413 INFO L226 Difference]: Without dead ends: 125 [2025-03-16 17:51:34,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7325 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3191, Invalid=17689, Unknown=0, NotChecked=0, Total=20880 [2025-03-16 17:51:34,414 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:34,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 272 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 17:51:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2025-03-16 17:51:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2025-03-16 17:51:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2025-03-16 17:51:34,450 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 63 [2025-03-16 17:51:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:34,450 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2025-03-16 17:51:34,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.8775510204081634) internal successors, (184), 98 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2025-03-16 17:51:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-03-16 17:51:34,451 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:34,451 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1] [2025-03-16 17:51:34,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-16 17:51:34,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:34,652 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:34,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2105720364, now seen corresponding path program 17 times [2025-03-16 17:51:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:34,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794887932] [2025-03-16 17:51:34,652 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:34,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:34,657 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 16 equivalence classes. [2025-03-16 17:51:34,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 17:51:34,673 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-16 17:51:34,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 170 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:35,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794887932] [2025-03-16 17:51:35,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794887932] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:35,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748363198] [2025-03-16 17:51:35,607 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 17:51:35,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:35,609 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) [2025-03-16 17:51:35,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-16 17:51:35,646 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 67 statements into 16 equivalence classes. [2025-03-16 17:51:35,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 67 of 67 statements. [2025-03-16 17:51:35,673 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-16 17:51:35,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:35,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjuncts are in the unsatisfiable core [2025-03-16 17:51:35,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:36,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:37,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748363198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:37,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:37,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 87 [2025-03-16 17:51:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434299037] [2025-03-16 17:51:37,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:37,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2025-03-16 17:51:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:37,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2025-03-16 17:51:37,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6404, Unknown=0, NotChecked=0, Total=7482 [2025-03-16 17:51:37,969 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:41,665 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2025-03-16 17:51:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2025-03-16 17:51:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2025-03-16 17:51:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:41,666 INFO L225 Difference]: With dead ends: 229 [2025-03-16 17:51:41,666 INFO L226 Difference]: Without dead ends: 176 [2025-03-16 17:51:41,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4637 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2807, Invalid=15825, Unknown=0, NotChecked=0, Total=18632 [2025-03-16 17:51:41,667 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:41,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 398 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-16 17:51:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-03-16 17:51:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2025-03-16 17:51:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 131 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2025-03-16 17:51:41,721 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 67 [2025-03-16 17:51:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:41,721 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2025-03-16 17:51:41,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 87 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2025-03-16 17:51:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-16 17:51:41,722 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:41,722 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1] [2025-03-16 17:51:41,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-16 17:51:41,922 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,SelfDestructingSolverStorable20 [2025-03-16 17:51:41,922 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:41,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1272981656, now seen corresponding path program 18 times [2025-03-16 17:51:41,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49714002] [2025-03-16 17:51:41,923 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:41,937 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 71 statements into 17 equivalence classes. [2025-03-16 17:51:41,964 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 17:51:41,964 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-16 17:51:41,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:42,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:42,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49714002] [2025-03-16 17:51:42,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49714002] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:42,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403986306] [2025-03-16 17:51:42,654 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 17:51:42,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:42,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:42,656 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) [2025-03-16 17:51:42,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-16 17:51:42,694 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 71 statements into 17 equivalence classes. [2025-03-16 17:51:42,729 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 71 of 71 statements. [2025-03-16 17:51:42,729 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-16 17:51:42,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:42,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-16 17:51:42,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:43,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403986306] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:45,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 109 [2025-03-16 17:51:45,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431312885] [2025-03-16 17:51:45,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:45,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2025-03-16 17:51:45,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:45,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2025-03-16 17:51:45,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1538, Invalid=10234, Unknown=0, NotChecked=0, Total=11772 [2025-03-16 17:51:45,906 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 109 states, 109 states have (on average 1.908256880733945) internal successors, (208), 109 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:50,231 INFO L93 Difference]: Finished difference Result 286 states and 308 transitions. [2025-03-16 17:51:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-03-16 17:51:50,232 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.908256880733945) internal successors, (208), 109 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2025-03-16 17:51:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:50,233 INFO L225 Difference]: With dead ends: 286 [2025-03-16 17:51:50,233 INFO L226 Difference]: Without dead ends: 230 [2025-03-16 17:51:50,234 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7045 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3720, Invalid=22362, Unknown=0, NotChecked=0, Total=26082 [2025-03-16 17:51:50,235 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 3237 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:50,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 530 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 3237 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-16 17:51:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2025-03-16 17:51:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 184. [2025-03-16 17:51:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.1202185792349726) internal successors, (205), 183 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 205 transitions. [2025-03-16 17:51:50,320 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 205 transitions. Word has length 71 [2025-03-16 17:51:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:50,320 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 205 transitions. [2025-03-16 17:51:50,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.908256880733945) internal successors, (208), 109 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 205 transitions. [2025-03-16 17:51:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-16 17:51:50,320 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:50,320 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1] [2025-03-16 17:51:50,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-16 17:51:50,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-16 17:51:50,521 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:50,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1860661332, now seen corresponding path program 19 times [2025-03-16 17:51:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894701175] [2025-03-16 17:51:50,521 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:50,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:50,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 17:51:50,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 17:51:50,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:50,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:51,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:51:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894701175] [2025-03-16 17:51:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894701175] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:51:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853176112] [2025-03-16 17:51:51,863 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 17:51:51,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:51:51,864 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:51:51,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-16 17:51:51,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-03-16 17:51:51,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-03-16 17:51:51,926 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 17:51:51,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:51:51,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-16 17:51:51,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:51:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:52,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:51:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:51:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853176112] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:51:54,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:51:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 98 [2025-03-16 17:51:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688231756] [2025-03-16 17:51:54,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:51:54,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2025-03-16 17:51:54,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:51:54,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2025-03-16 17:51:54,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=8123, Unknown=0, NotChecked=0, Total=9506 [2025-03-16 17:51:54,799 INFO L87 Difference]: Start difference. First operand 184 states and 205 transitions. Second operand has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:51:59,669 INFO L93 Difference]: Finished difference Result 346 states and 371 transitions. [2025-03-16 17:51:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-16 17:51:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2025-03-16 17:51:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:51:59,670 INFO L225 Difference]: With dead ends: 346 [2025-03-16 17:51:59,670 INFO L226 Difference]: Without dead ends: 287 [2025-03-16 17:51:59,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5849 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3487, Invalid=19769, Unknown=0, NotChecked=0, Total=23256 [2025-03-16 17:51:59,671 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 3196 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-16 17:51:59,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 618 Invalid, 3349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3196 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-16 17:51:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2025-03-16 17:51:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 239. [2025-03-16 17:51:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1092436974789917) internal successors, (264), 238 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 264 transitions. [2025-03-16 17:51:59,773 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 264 transitions. Word has length 75 [2025-03-16 17:51:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:51:59,773 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 264 transitions. [2025-03-16 17:51:59,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:51:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 264 transitions. [2025-03-16 17:51:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 17:51:59,774 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:51:59,774 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1] [2025-03-16 17:51:59,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-16 17:51:59,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:51:59,974 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:51:59,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:51:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 630418408, now seen corresponding path program 20 times [2025-03-16 17:51:59,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:51:59,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924171011] [2025-03-16 17:51:59,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:51:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:51:59,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-16 17:51:59,989 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 17:51:59,989 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:51:59,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:00,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924171011] [2025-03-16 17:52:00,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924171011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:00,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541812060] [2025-03-16 17:52:00,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 17:52:00,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:00,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:00,827 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:52:00,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-16 17:52:00,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 79 statements into 2 equivalence classes. [2025-03-16 17:52:00,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 17:52:00,895 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 17:52:00,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:00,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-16 17:52:00,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:02,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541812060] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:04,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:04,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 121 [2025-03-16 17:52:04,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325639597] [2025-03-16 17:52:04,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:04,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2025-03-16 17:52:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:04,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2025-03-16 17:52:04,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2129, Invalid=12391, Unknown=0, NotChecked=0, Total=14520 [2025-03-16 17:52:04,133 INFO L87 Difference]: Start difference. First operand 239 states and 264 transitions. Second operand has 121 states, 121 states have (on average 1.9173553719008265) internal successors, (232), 121 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:09,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:09,519 INFO L93 Difference]: Finished difference Result 409 states and 438 transitions. [2025-03-16 17:52:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2025-03-16 17:52:09,519 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.9173553719008265) internal successors, (232), 121 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-16 17:52:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:09,521 INFO L225 Difference]: With dead ends: 409 [2025-03-16 17:52:09,521 INFO L226 Difference]: Without dead ends: 347 [2025-03-16 17:52:09,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11584 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=4831, Invalid=27389, Unknown=0, NotChecked=0, Total=32220 [2025-03-16 17:52:09,522 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 3648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:09,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 669 Invalid, 3648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-16 17:52:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2025-03-16 17:52:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 297. [2025-03-16 17:52:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.1047297297297298) internal successors, (327), 296 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 327 transitions. [2025-03-16 17:52:09,644 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 327 transitions. Word has length 79 [2025-03-16 17:52:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:09,645 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 327 transitions. [2025-03-16 17:52:09,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.9173553719008265) internal successors, (232), 121 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 327 transitions. [2025-03-16 17:52:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2025-03-16 17:52:09,645 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:09,645 INFO L218 NwaCegarLoop]: trace histogram [31, 15, 14, 14, 1, 1, 1, 1, 1] [2025-03-16 17:52:09,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-16 17:52:09,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:09,846 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:09,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash -988505880, now seen corresponding path program 21 times [2025-03-16 17:52:09,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:09,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601796232] [2025-03-16 17:52:09,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:52:09,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:09,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 79 statements into 17 equivalence classes. [2025-03-16 17:52:09,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 17:52:09,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2025-03-16 17:52:09,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 435 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:10,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:10,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601796232] [2025-03-16 17:52:10,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601796232] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:10,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152234597] [2025-03-16 17:52:10,826 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 17:52:10,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:10,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:10,828 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:52:10,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-16 17:52:10,868 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 79 statements into 17 equivalence classes. [2025-03-16 17:52:10,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) and asserted 79 of 79 statements. [2025-03-16 17:52:10,908 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2025-03-16 17:52:10,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:10,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 84 conjuncts are in the unsatisfiable core [2025-03-16 17:52:10,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 0 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:11,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 17:52:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 0 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152234597] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 17:52:13,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 17:52:13,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 127 [2025-03-16 17:52:13,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732083390] [2025-03-16 17:52:13,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 17:52:13,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2025-03-16 17:52:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 17:52:13,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2025-03-16 17:52:13,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3390, Invalid=12612, Unknown=0, NotChecked=0, Total=16002 [2025-03-16 17:52:13,126 INFO L87 Difference]: Start difference. First operand 297 states and 327 transitions. Second operand has 127 states, 127 states have (on average 1.4881889763779528) internal successors, (189), 127 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 17:52:15,253 INFO L93 Difference]: Finished difference Result 961 states and 1006 transitions. [2025-03-16 17:52:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-03-16 17:52:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.4881889763779528) internal successors, (189), 127 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2025-03-16 17:52:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 17:52:15,256 INFO L225 Difference]: With dead ends: 961 [2025-03-16 17:52:15,256 INFO L226 Difference]: Without dead ends: 959 [2025-03-16 17:52:15,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12054 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6417, Invalid=28365, Unknown=0, NotChecked=0, Total=34782 [2025-03-16 17:52:15,258 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-16 17:52:15,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 93 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-16 17:52:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2025-03-16 17:52:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 128. [2025-03-16 17:52:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2025-03-16 17:52:15,356 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 79 [2025-03-16 17:52:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 17:52:15,356 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2025-03-16 17:52:15,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.4881889763779528) internal successors, (189), 127 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 17:52:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2025-03-16 17:52:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-16 17:52:15,357 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 17:52:15,357 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1] [2025-03-16 17:52:15,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-16 17:52:15,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-16 17:52:15,558 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 17:52:15,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 17:52:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1171816748, now seen corresponding path program 22 times [2025-03-16 17:52:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 17:52:15,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113702475] [2025-03-16 17:52:15,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:52:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 17:52:15,563 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 83 statements into 2 equivalence classes. [2025-03-16 17:52:15,573 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-03-16 17:52:15,573 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:52:15,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 513 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 17:52:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113702475] [2025-03-16 17:52:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113702475] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 17:52:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010721070] [2025-03-16 17:52:17,137 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 17:52:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 17:52:17,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 17:52:17,139 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-16 17:52:17,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-16 17:52:17,182 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 83 statements into 2 equivalence classes. [2025-03-16 17:52:17,206 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-03-16 17:52:17,206 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 17:52:17,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 17:52:17,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 88 conjuncts are in the unsatisfiable core [2025-03-16 17:52:17,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 17:52:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 17:52:18,575 INFO L312 TraceCheckSpWp]: Computing backward predicates...