./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 18:10:58,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 18:10:58,217 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 18:10:58,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 18:10:58,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 18:10:58,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 18:10:58,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 18:10:58,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 18:10:58,245 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 18:10:58,246 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 18:10:58,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 18:10:58,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 18:10:58,247 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 18:10:58,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 18:10:58,247 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 18:10:58,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 18:10:58,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 18:10:58,248 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 18:10:58,248 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:10:58,249 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 18:10:58,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 18:10:58,250 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 18:10:58,250 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 18:10:58,250 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 18:10:58,250 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 18:10:58,250 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 -> 6d288c71d1b2e69759b6f9526e6975c86927bb09c8445c07388947e8f3491289 [2025-03-16 18:10:58,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 18:10:58,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 18:10:58,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 18:10:58,463 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 18:10:58,463 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 18:10:58,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2025-03-16 18:10:59,566 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc6f8362/a8e3e225a76c479ea5bde33f85286bf1/FLAG7193da3c5 [2025-03-16 18:10:59,786 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 18:10:59,787 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2025-03-16 18:10:59,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc6f8362/a8e3e225a76c479ea5bde33f85286bf1/FLAG7193da3c5 [2025-03-16 18:11:00,128 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc6f8362/a8e3e225a76c479ea5bde33f85286bf1 [2025-03-16 18:11:00,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 18:11:00,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 18:11:00,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 18:11:00,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 18:11:00,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 18:11:00,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652ce60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00, skipping insertion in model container [2025-03-16 18:11:00,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,143 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 18:11:00,242 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/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2025-03-16 18:11:00,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:11:00,269 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 18:11:00,277 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/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2025-03-16 18:11:00,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 18:11:00,294 INFO L204 MainTranslator]: Completed translation [2025-03-16 18:11:00,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00 WrapperNode [2025-03-16 18:11:00,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 18:11:00,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 18:11:00,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 18:11:00,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 18:11:00,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,318 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2025-03-16 18:11:00,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 18:11:00,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 18:11:00,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 18:11:00,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 18:11:00,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,337 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 18:11:00,338 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,341 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,343 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,345 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 18:11:00,345 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 18:11:00,345 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 18:11:00,345 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 18:11:00,346 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (1/1) ... [2025-03-16 18:11:00,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 18:11:00,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:00,370 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 18:11:00,376 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 18:11:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 18:11:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-16 18:11:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-16 18:11:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 18:11:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 18:11:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 18:11:00,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-16 18:11:00,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-16 18:11:00,438 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 18:11:00,439 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 18:11:00,553 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-03-16 18:11:00,554 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 18:11:00,559 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 18:11:00,560 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 18:11:00,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:11:00 BoogieIcfgContainer [2025-03-16 18:11:00,560 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 18:11:00,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 18:11:00,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 18:11:00,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 18:11:00,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 06:11:00" (1/3) ... [2025-03-16 18:11:00,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773d95fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:11:00, skipping insertion in model container [2025-03-16 18:11:00,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 06:11:00" (2/3) ... [2025-03-16 18:11:00,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773d95fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 06:11:00, skipping insertion in model container [2025-03-16 18:11:00,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:11:00" (3/3) ... [2025-03-16 18:11:00,567 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2025-03-16 18:11:00,578 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 18:11:00,580 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_unwindbound5.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 18:11:00,612 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 18:11:00,621 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;@31146c77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 18:11:00,621 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 18:11:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-16 18:11:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 18:11:00,627 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:00,627 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:00,628 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:00,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1807676570, now seen corresponding path program 1 times [2025-03-16 18:11:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:00,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665690017] [2025-03-16 18:11:00,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:00,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:00,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:11:00,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:11:00,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:00,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:11:00,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:00,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665690017] [2025-03-16 18:11:00,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665690017] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:00,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336914959] [2025-03-16 18:11:00,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:00,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:00,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:00,735 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 18:11:00,737 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 18:11:00,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-16 18:11:00,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 18:11:00,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:00,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:00,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-16 18:11:00,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-16 18:11:00,792 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:00,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336914959] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:00,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:11:00,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-16 18:11:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946592897] [2025-03-16 18:11:00,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:00,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-16 18:11:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:00,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-16 18:11:00,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:11:00,815 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:11:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:00,830 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2025-03-16 18:11:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-16 18:11:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-16 18:11:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:00,835 INFO L225 Difference]: With dead ends: 64 [2025-03-16 18:11:00,835 INFO L226 Difference]: Without dead ends: 30 [2025-03-16 18:11:00,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-16 18:11:00,841 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:00,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-16 18:11:00,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-03-16 18:11:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:11:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2025-03-16 18:11:00,866 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2025-03-16 18:11:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:00,866 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2025-03-16 18:11:00,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:11:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2025-03-16 18:11:00,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-16 18:11:00,867 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:00,867 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:00,872 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 18:11:01,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-16 18:11:01,067 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:01,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:01,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1469246174, now seen corresponding path program 1 times [2025-03-16 18:11:01,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:01,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083364550] [2025-03-16 18:11:01,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:01,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:01,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-16 18:11:01,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-16 18:11:01,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:01,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083364550] [2025-03-16 18:11:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083364550] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:01,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:01,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-16 18:11:01,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490360110] [2025-03-16 18:11:01,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:01,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-16 18:11:01,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:01,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-16 18:11:01,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:11:01,172 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:01,194 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2025-03-16 18:11:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-16 18:11:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2025-03-16 18:11:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:01,195 INFO L225 Difference]: With dead ends: 39 [2025-03-16 18:11:01,195 INFO L226 Difference]: Without dead ends: 32 [2025-03-16 18:11:01,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-16 18:11:01,195 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:01,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 101 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-16 18:11:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-03-16 18:11:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:11:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2025-03-16 18:11:01,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2025-03-16 18:11:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:01,201 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2025-03-16 18:11:01,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2025-03-16 18:11:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-16 18:11:01,202 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:01,202 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:01,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 18:11:01,202 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:01,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:01,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1746893898, now seen corresponding path program 1 times [2025-03-16 18:11:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:01,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450158984] [2025-03-16 18:11:01,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:01,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:01,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-16 18:11:01,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-16 18:11:01,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:01,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 18:11:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450158984] [2025-03-16 18:11:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450158984] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:01,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:11:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279228475] [2025-03-16 18:11:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:01,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:11:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:01,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:11:01,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:01,335 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:01,404 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2025-03-16 18:11:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:11:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-03-16 18:11:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:01,405 INFO L225 Difference]: With dead ends: 52 [2025-03-16 18:11:01,405 INFO L226 Difference]: Without dead ends: 45 [2025-03-16 18:11:01,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:01,406 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:01,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 129 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-03-16 18:11:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2025-03-16 18:11:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-03-16 18:11:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2025-03-16 18:11:01,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2025-03-16 18:11:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:01,416 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2025-03-16 18:11:01,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2025-03-16 18:11:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 18:11:01,417 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:01,417 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:01,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-16 18:11:01,418 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:01,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash 970428589, now seen corresponding path program 1 times [2025-03-16 18:11:01,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:01,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169187213] [2025-03-16 18:11:01,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:01,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:01,424 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 18:11:01,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 18:11:01,440 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:01,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:01,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706200109] [2025-03-16 18:11:01,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:01,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:01,443 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 18:11:01,444 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 18:11:01,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 18:11:01,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 18:11:01,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:01,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:01,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:11:01,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:01,588 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169187213] [2025-03-16 18:11:01,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706200109] [2025-03-16 18:11:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706200109] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:01,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:01,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583383423] [2025-03-16 18:11:01,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:01,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:01,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:01,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:01,589 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:01,624 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2025-03-16 18:11:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:01,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2025-03-16 18:11:01,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:01,625 INFO L225 Difference]: With dead ends: 51 [2025-03-16 18:11:01,625 INFO L226 Difference]: Without dead ends: 49 [2025-03-16 18:11:01,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:01,625 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:01,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-03-16 18:11:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-03-16 18:11:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 34 states have internal predecessors, (44), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 18:11:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2025-03-16 18:11:01,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2025-03-16 18:11:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:01,637 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2025-03-16 18:11:01,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2025-03-16 18:11:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-16 18:11:01,637 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:01,637 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:01,643 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 18:11:01,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-16 18:11:01,838 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:01,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash 984106180, now seen corresponding path program 1 times [2025-03-16 18:11:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660643922] [2025-03-16 18:11:01,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:01,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-16 18:11:01,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-16 18:11:01,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:01,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:01,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:01,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660643922] [2025-03-16 18:11:01,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660643922] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:01,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:01,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:01,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109698721] [2025-03-16 18:11:01,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:01,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:01,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:01,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:01,914 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:01,933 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2025-03-16 18:11:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2025-03-16 18:11:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:01,935 INFO L225 Difference]: With dead ends: 72 [2025-03-16 18:11:01,935 INFO L226 Difference]: Without dead ends: 50 [2025-03-16 18:11:01,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:01,936 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:01,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2025-03-16 18:11:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2025-03-16 18:11:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-16 18:11:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2025-03-16 18:11:01,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2025-03-16 18:11:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:01,944 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2025-03-16 18:11:01,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2025-03-16 18:11:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-16 18:11:01,944 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:01,944 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:01,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-16 18:11:01,944 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:01,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash -740873018, now seen corresponding path program 1 times [2025-03-16 18:11:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173615686] [2025-03-16 18:11:01,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:01,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-16 18:11:01,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 18:11:01,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:01,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:02,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173615686] [2025-03-16 18:11:02,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173615686] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:02,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057039102] [2025-03-16 18:11:02,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:02,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:02,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:02,019 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 18:11:02,021 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 18:11:02,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-16 18:11:02,061 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-16 18:11:02,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:02,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:02,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:11:02,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:02,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:02,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057039102] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:02,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:11:02,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2025-03-16 18:11:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939966326] [2025-03-16 18:11:02,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:02,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:11:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:02,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:11:02,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:11:02,151 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:11:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:02,269 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2025-03-16 18:11:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:11:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2025-03-16 18:11:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:02,270 INFO L225 Difference]: With dead ends: 111 [2025-03-16 18:11:02,270 INFO L226 Difference]: Without dead ends: 104 [2025-03-16 18:11:02,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:11:02,271 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:02,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 214 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-16 18:11:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2025-03-16 18:11:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.328358208955224) internal successors, (89), 70 states have internal predecessors, (89), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2025-03-16 18:11:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 127 transitions. [2025-03-16 18:11:02,290 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 127 transitions. Word has length 25 [2025-03-16 18:11:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:02,290 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 127 transitions. [2025-03-16 18:11:02,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:11:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 127 transitions. [2025-03-16 18:11:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-16 18:11:02,291 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:02,291 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:02,297 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 18:11:02,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:02,491 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:02,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1541112114, now seen corresponding path program 1 times [2025-03-16 18:11:02,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:02,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959205240] [2025-03-16 18:11:02,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:02,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:02,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-16 18:11:02,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 18:11:02,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:02,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 18:11:02,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959205240] [2025-03-16 18:11:02,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959205240] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:02,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279620834] [2025-03-16 18:11:02,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:02,581 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 18:11:02,582 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 18:11:02,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-16 18:11:02,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-16 18:11:02,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:02,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:02,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:11:02,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 18:11:02,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 18:11:02,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279620834] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:02,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:11:02,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-03-16 18:11:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137665532] [2025-03-16 18:11:02,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:02,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:11:02,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:02,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:11:02,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:11:02,713 INFO L87 Difference]: Start difference. First operand 95 states and 127 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:11:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:02,885 INFO L93 Difference]: Finished difference Result 181 states and 258 transitions. [2025-03-16 18:11:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-16 18:11:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2025-03-16 18:11:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:02,888 INFO L225 Difference]: With dead ends: 181 [2025-03-16 18:11:02,888 INFO L226 Difference]: Without dead ends: 169 [2025-03-16 18:11:02,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-03-16 18:11:02,888 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 111 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:02,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 337 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-03-16 18:11:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2025-03-16 18:11:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 97 states have internal predecessors, (128), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-16 18:11:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 173 transitions. [2025-03-16 18:11:02,906 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 173 transitions. Word has length 26 [2025-03-16 18:11:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:02,906 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 173 transitions. [2025-03-16 18:11:02,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-16 18:11:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 173 transitions. [2025-03-16 18:11:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-16 18:11:02,907 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:02,907 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:02,914 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 18:11:03,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:03,108 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:03,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1954569055, now seen corresponding path program 1 times [2025-03-16 18:11:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:03,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984454956] [2025-03-16 18:11:03,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:03,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:11:03,118 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:11:03,118 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:03,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232151762] [2025-03-16 18:11:03,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:03,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:03,121 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 18:11:03,123 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 18:11:03,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-16 18:11:03,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-16 18:11:03,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:03,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:03,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:11:03,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:03,230 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984454956] [2025-03-16 18:11:03,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232151762] [2025-03-16 18:11:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232151762] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:03,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:03,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031167026] [2025-03-16 18:11:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:03,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:03,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:03,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:03,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:03,240 INFO L87 Difference]: Start difference. First operand 126 states and 173 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:11:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:03,278 INFO L93 Difference]: Finished difference Result 141 states and 187 transitions. [2025-03-16 18:11:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2025-03-16 18:11:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:03,279 INFO L225 Difference]: With dead ends: 141 [2025-03-16 18:11:03,279 INFO L226 Difference]: Without dead ends: 139 [2025-03-16 18:11:03,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:03,280 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:03,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-03-16 18:11:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2025-03-16 18:11:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.3173076923076923) internal successors, (137), 106 states have internal predecessors, (137), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2025-03-16 18:11:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 182 transitions. [2025-03-16 18:11:03,298 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 182 transitions. Word has length 29 [2025-03-16 18:11:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:03,298 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 182 transitions. [2025-03-16 18:11:03,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:11:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 182 transitions. [2025-03-16 18:11:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 18:11:03,299 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:03,299 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:03,305 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 18:11:03,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:03,499 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:03,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash -657668971, now seen corresponding path program 1 times [2025-03-16 18:11:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:03,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237657898] [2025-03-16 18:11:03,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:03,503 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 18:11:03,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 18:11:03,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:03,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:03,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196442432] [2025-03-16 18:11:03,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:03,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:03,512 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 18:11:03,513 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 18:11:03,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 18:11:03,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 18:11:03,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:03,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:03,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-16 18:11:03,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:03,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:03,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237657898] [2025-03-16 18:11:03,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:03,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196442432] [2025-03-16 18:11:03,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196442432] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:03,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:11:03,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-03-16 18:11:03,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300868222] [2025-03-16 18:11:03,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:03,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 18:11:03,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:03,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 18:11:03,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:11:03,764 INFO L87 Difference]: Start difference. First operand 138 states and 182 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:03,845 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2025-03-16 18:11:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:11:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2025-03-16 18:11:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:03,847 INFO L225 Difference]: With dead ends: 173 [2025-03-16 18:11:03,847 INFO L226 Difference]: Without dead ends: 171 [2025-03-16 18:11:03,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:11:03,848 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:03,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 257 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-16 18:11:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2025-03-16 18:11:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 125 states have (on average 1.344) internal successors, (168), 127 states have internal predecessors, (168), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-16 18:11:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 229 transitions. [2025-03-16 18:11:03,861 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 229 transitions. Word has length 31 [2025-03-16 18:11:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:03,861 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 229 transitions. [2025-03-16 18:11:03,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 229 transitions. [2025-03-16 18:11:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-16 18:11:03,870 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:03,870 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:03,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:04,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:04,072 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:04,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1954438271, now seen corresponding path program 1 times [2025-03-16 18:11:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:04,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959281625] [2025-03-16 18:11:04,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:04,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-16 18:11:04,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-16 18:11:04,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:04,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:04,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:04,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959281625] [2025-03-16 18:11:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959281625] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:04,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:04,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-16 18:11:04,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275258354] [2025-03-16 18:11:04,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:04,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-16 18:11:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:04,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-16 18:11:04,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:04,117 INFO L87 Difference]: Start difference. First operand 168 states and 229 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:04,146 INFO L93 Difference]: Finished difference Result 235 states and 322 transitions. [2025-03-16 18:11:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:11:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2025-03-16 18:11:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:04,148 INFO L225 Difference]: With dead ends: 235 [2025-03-16 18:11:04,148 INFO L226 Difference]: Without dead ends: 168 [2025-03-16 18:11:04,149 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:04,150 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:04,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 107 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-03-16 18:11:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2025-03-16 18:11:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 125 states have (on average 1.336) internal successors, (167), 127 states have internal predecessors, (167), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2025-03-16 18:11:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 228 transitions. [2025-03-16 18:11:04,170 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 228 transitions. Word has length 31 [2025-03-16 18:11:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:04,170 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 228 transitions. [2025-03-16 18:11:04,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 228 transitions. [2025-03-16 18:11:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-03-16 18:11:04,171 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:04,171 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:04,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-16 18:11:04,171 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:04,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2056824787, now seen corresponding path program 1 times [2025-03-16 18:11:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:04,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158651863] [2025-03-16 18:11:04,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:04,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 18:11:04,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 18:11:04,182 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:04,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928806820] [2025-03-16 18:11:04,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:04,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:04,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:04,185 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 18:11:04,186 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 18:11:04,208 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-16 18:11:04,219 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-16 18:11:04,219 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:04,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:04,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:11:04,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-16 18:11:04,257 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:04,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158651863] [2025-03-16 18:11:04,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:04,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928806820] [2025-03-16 18:11:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928806820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:04,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530184698] [2025-03-16 18:11:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:04,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:04,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:04,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:04,257 INFO L87 Difference]: Start difference. First operand 168 states and 228 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:11:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:04,307 INFO L93 Difference]: Finished difference Result 233 states and 328 transitions. [2025-03-16 18:11:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:04,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2025-03-16 18:11:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:04,309 INFO L225 Difference]: With dead ends: 233 [2025-03-16 18:11:04,309 INFO L226 Difference]: Without dead ends: 231 [2025-03-16 18:11:04,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:04,310 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:04,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-03-16 18:11:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2025-03-16 18:11:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 158 states have (on average 1.3670886075949367) internal successors, (216), 160 states have internal predecessors, (216), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2025-03-16 18:11:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 317 transitions. [2025-03-16 18:11:04,329 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 317 transitions. Word has length 34 [2025-03-16 18:11:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:04,329 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 317 transitions. [2025-03-16 18:11:04,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-16 18:11:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 317 transitions. [2025-03-16 18:11:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-16 18:11:04,330 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:04,330 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:04,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 18:11:04,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:04,531 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:04,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2042058871, now seen corresponding path program 1 times [2025-03-16 18:11:04,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:04,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422250013] [2025-03-16 18:11:04,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:04,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:04,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:11:04,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:11:04,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:04,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504123495] [2025-03-16 18:11:04,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:04,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:04,547 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 18:11:04,548 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 18:11:04,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-16 18:11:04,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-16 18:11:04,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:04,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:04,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-16 18:11:04,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:04,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:04,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422250013] [2025-03-16 18:11:04,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:04,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504123495] [2025-03-16 18:11:04,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504123495] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:04,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-16 18:11:04,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-03-16 18:11:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208134667] [2025-03-16 18:11:04,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:04,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-16 18:11:04,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:04,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-16 18:11:04,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:11:04,744 INFO L87 Difference]: Start difference. First operand 224 states and 317 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:11:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:04,853 INFO L93 Difference]: Finished difference Result 236 states and 327 transitions. [2025-03-16 18:11:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-16 18:11:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2025-03-16 18:11:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:04,855 INFO L225 Difference]: With dead ends: 236 [2025-03-16 18:11:04,855 INFO L226 Difference]: Without dead ends: 234 [2025-03-16 18:11:04,855 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:11:04,855 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:04,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 232 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2025-03-16 18:11:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2025-03-16 18:11:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 164 states have (on average 1.353658536585366) internal successors, (222), 166 states have internal predecessors, (222), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2025-03-16 18:11:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 323 transitions. [2025-03-16 18:11:04,869 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 323 transitions. Word has length 36 [2025-03-16 18:11:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:04,869 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 323 transitions. [2025-03-16 18:11:04,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-16 18:11:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 323 transitions. [2025-03-16 18:11:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-03-16 18:11:04,870 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:04,870 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:04,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:05,074 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,SelfDestructingSolverStorable11 [2025-03-16 18:11:05,074 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:05,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:05,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2028409951, now seen corresponding path program 1 times [2025-03-16 18:11:05,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:05,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131392171] [2025-03-16 18:11:05,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:05,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:05,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 18:11:05,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 18:11:05,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:05,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:05,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848040225] [2025-03-16 18:11:05,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:05,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:05,085 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 18:11:05,086 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 18:11:05,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-16 18:11:05,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-16 18:11:05,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:05,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:05,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-16 18:11:05,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-16 18:11:05,167 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-16 18:11:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131392171] [2025-03-16 18:11:05,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:05,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848040225] [2025-03-16 18:11:05,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848040225] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:05,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:05,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534189710] [2025-03-16 18:11:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:05,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:05,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:05,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:05,168 INFO L87 Difference]: Start difference. First operand 232 states and 323 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:11:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:05,213 INFO L93 Difference]: Finished difference Result 306 states and 450 transitions. [2025-03-16 18:11:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-16 18:11:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2025-03-16 18:11:05,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:05,215 INFO L225 Difference]: With dead ends: 306 [2025-03-16 18:11:05,215 INFO L226 Difference]: Without dead ends: 304 [2025-03-16 18:11:05,215 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-16 18:11:05,215 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:05,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2025-03-16 18:11:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 290. [2025-03-16 18:11:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 185 states have (on average 1.3567567567567567) internal successors, (251), 196 states have internal predecessors, (251), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 76 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-16 18:11:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 424 transitions. [2025-03-16 18:11:05,241 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 424 transitions. Word has length 39 [2025-03-16 18:11:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:05,241 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 424 transitions. [2025-03-16 18:11:05,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-03-16 18:11:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 424 transitions. [2025-03-16 18:11:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 18:11:05,242 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:05,242 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:05,248 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 18:11:05,442 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,SelfDestructingSolverStorable12 [2025-03-16 18:11:05,443 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:05,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:05,443 INFO L85 PathProgramCache]: Analyzing trace with hash -963970339, now seen corresponding path program 1 times [2025-03-16 18:11:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:05,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397331773] [2025-03-16 18:11:05,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:05,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:05,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:11:05,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:11:05,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:05,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:05,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:05,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397331773] [2025-03-16 18:11:05,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397331773] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:05,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150220171] [2025-03-16 18:11:05,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:05,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:05,509 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 18:11:05,509 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 18:11:05,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:11:05,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:11:05,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:05,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:05,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-16 18:11:05,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:05,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:05,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150220171] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:05,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:11:05,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2025-03-16 18:11:05,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333009652] [2025-03-16 18:11:05,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:05,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 18:11:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:05,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 18:11:05,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-03-16 18:11:05,623 INFO L87 Difference]: Start difference. First operand 290 states and 424 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:11:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:05,695 INFO L93 Difference]: Finished difference Result 489 states and 734 transitions. [2025-03-16 18:11:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:11:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2025-03-16 18:11:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:05,698 INFO L225 Difference]: With dead ends: 489 [2025-03-16 18:11:05,699 INFO L226 Difference]: Without dead ends: 299 [2025-03-16 18:11:05,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-03-16 18:11:05,700 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:05,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 140 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 18:11:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2025-03-16 18:11:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2025-03-16 18:11:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 190 states have (on average 1.3421052631578947) internal successors, (255), 200 states have internal predecessors, (255), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-16 18:11:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 428 transitions. [2025-03-16 18:11:05,727 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 428 transitions. Word has length 37 [2025-03-16 18:11:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:05,727 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 428 transitions. [2025-03-16 18:11:05,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-16 18:11:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 428 transitions. [2025-03-16 18:11:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-16 18:11:05,727 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:05,727 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:05,734 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 18:11:05,928 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,SelfDestructingSolverStorable13 [2025-03-16 18:11:05,928 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:05,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -330822661, now seen corresponding path program 1 times [2025-03-16 18:11:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402626074] [2025-03-16 18:11:05,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:05,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:11:05,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:11:05,935 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:05,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:05,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:05,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402626074] [2025-03-16 18:11:05,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402626074] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 18:11:05,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956195176] [2025-03-16 18:11:05,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:05,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:05,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:05,989 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 18:11:05,991 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 18:11:06,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-16 18:11:06,023 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-16 18:11:06,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:06,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:06,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-16 18:11:06,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:06,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956195176] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:06,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 18:11:06,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 9 [2025-03-16 18:11:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141778446] [2025-03-16 18:11:06,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:06,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-16 18:11:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:06,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-16 18:11:06,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-16 18:11:06,112 INFO L87 Difference]: Start difference. First operand 295 states and 428 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:11:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:06,199 INFO L93 Difference]: Finished difference Result 450 states and 669 transitions. [2025-03-16 18:11:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 18:11:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2025-03-16 18:11:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:06,201 INFO L225 Difference]: With dead ends: 450 [2025-03-16 18:11:06,201 INFO L226 Difference]: Without dead ends: 300 [2025-03-16 18:11:06,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-03-16 18:11:06,203 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:06,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 200 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2025-03-16 18:11:06,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2025-03-16 18:11:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 193 states have (on average 1.3264248704663213) internal successors, (256), 203 states have internal predecessors, (256), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-16 18:11:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 429 transitions. [2025-03-16 18:11:06,241 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 429 transitions. Word has length 37 [2025-03-16 18:11:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:06,241 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 429 transitions. [2025-03-16 18:11:06,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-03-16 18:11:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 429 transitions. [2025-03-16 18:11:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 18:11:06,242 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:06,242 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:06,248 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 18:11:06,442 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,SelfDestructingSolverStorable14 [2025-03-16 18:11:06,442 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:06,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1815665581, now seen corresponding path program 2 times [2025-03-16 18:11:06,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:06,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018687470] [2025-03-16 18:11:06,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 18:11:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:06,447 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-16 18:11:06,452 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 18:11:06,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 18:11:06,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-16 18:11:06,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:06,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018687470] [2025-03-16 18:11:06,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018687470] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 18:11:06,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 18:11:06,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-16 18:11:06,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144676673] [2025-03-16 18:11:06,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 18:11:06,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-16 18:11:06,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:06,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-16 18:11:06,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-16 18:11:06,497 INFO L87 Difference]: Start difference. First operand 298 states and 429 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:06,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:06,600 INFO L93 Difference]: Finished difference Result 531 states and 808 transitions. [2025-03-16 18:11:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-16 18:11:06,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2025-03-16 18:11:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:06,603 INFO L225 Difference]: With dead ends: 531 [2025-03-16 18:11:06,603 INFO L226 Difference]: Without dead ends: 425 [2025-03-16 18:11:06,604 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-16 18:11:06,604 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:06,604 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 18:11:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2025-03-16 18:11:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 322. [2025-03-16 18:11:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 217 states have (on average 1.336405529953917) internal successors, (290), 227 states have internal predecessors, (290), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2025-03-16 18:11:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 463 transitions. [2025-03-16 18:11:06,644 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 463 transitions. Word has length 38 [2025-03-16 18:11:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:06,645 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 463 transitions. [2025-03-16 18:11:06,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-16 18:11:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 463 transitions. [2025-03-16 18:11:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-03-16 18:11:06,645 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:06,645 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:06,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-16 18:11:06,646 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:06,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash -381656869, now seen corresponding path program 1 times [2025-03-16 18:11:06,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:06,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533506031] [2025-03-16 18:11:06,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:06,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:06,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 18:11:06,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 18:11:06,660 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:06,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:06,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121640985] [2025-03-16 18:11:06,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:06,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:06,664 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 18:11:06,665 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 18:11:06,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-16 18:11:06,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-16 18:11:06,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:06,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 18:11:06,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-16 18:11:06,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 18:11:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-16 18:11:07,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 18:11:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-16 18:11:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 18:11:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533506031] [2025-03-16 18:11:07,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-16 18:11:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121640985] [2025-03-16 18:11:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121640985] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 18:11:07,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-16 18:11:07,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2025-03-16 18:11:07,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492212980] [2025-03-16 18:11:07,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-16 18:11:07,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 18:11:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 18:11:07,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 18:11:07,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-16 18:11:07,637 INFO L87 Difference]: Start difference. First operand 322 states and 463 transitions. Second operand has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 18:11:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 18:11:09,281 INFO L93 Difference]: Finished difference Result 704 states and 1074 transitions. [2025-03-16 18:11:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 18:11:09,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 53 [2025-03-16 18:11:09,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 18:11:09,285 INFO L225 Difference]: With dead ends: 704 [2025-03-16 18:11:09,286 INFO L226 Difference]: Without dead ends: 568 [2025-03-16 18:11:09,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2025-03-16 18:11:09,287 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 276 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-16 18:11:09,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 615 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-16 18:11:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2025-03-16 18:11:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 433. [2025-03-16 18:11:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 302 states have (on average 1.3576158940397351) internal successors, (410), 312 states have internal predecessors, (410), 111 states have call successors, (111), 19 states have call predecessors, (111), 19 states have return successors, (110), 101 states have call predecessors, (110), 110 states have call successors, (110) [2025-03-16 18:11:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 631 transitions. [2025-03-16 18:11:09,354 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 631 transitions. Word has length 53 [2025-03-16 18:11:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 18:11:09,354 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 631 transitions. [2025-03-16 18:11:09,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-03-16 18:11:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 631 transitions. [2025-03-16 18:11:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2025-03-16 18:11:09,355 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 18:11:09,355 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:09,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:09,560 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,SelfDestructingSolverStorable16 [2025-03-16 18:11:09,560 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 18:11:09,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 18:11:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1800462633, now seen corresponding path program 1 times [2025-03-16 18:11:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 18:11:09,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088236712] [2025-03-16 18:11:09,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 18:11:09,564 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 18:11:09,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 18:11:09,575 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:09,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-16 18:11:09,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823410064] [2025-03-16 18:11:09,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 18:11:09,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 18:11:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 18:11:09,578 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 18:11:09,580 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 18:11:09,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 18:11:09,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 18:11:09,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:09,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 18:11:09,618 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-16 18:11:09,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-03-16 18:11:09,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-03-16 18:11:09,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 18:11:09,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-16 18:11:09,663 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-16 18:11:09,663 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-16 18:11:09,664 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-16 18:11:09,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 18:11:09,870 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,SelfDestructingSolverStorable17 [2025-03-16 18:11:09,872 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 18:11:09,904 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-16 18:11:09,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.03 06:11:09 BoogieIcfgContainer [2025-03-16 18:11:09,910 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-16 18:11:09,910 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-16 18:11:09,910 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-16 18:11:09,910 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-16 18:11:09,911 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 06:11:00" (3/4) ... [2025-03-16 18:11:09,911 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-03-16 18:11:09,953 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 40. [2025-03-16 18:11:10,006 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-16 18:11:10,006 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-16 18:11:10,006 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-16 18:11:10,007 INFO L158 Benchmark]: Toolchain (without parser) took 9876.03ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 105.4MB in the beginning and 174.0MB in the end (delta: -68.6MB). Peak memory consumption was 133.9MB. Max. memory is 16.1GB. [2025-03-16 18:11:10,007 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory is still 116.7MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:11:10,007 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.02ms. Allocated memory is still 142.6MB. Free memory was 105.4MB in the beginning and 94.1MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:10,007 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.78ms. Allocated memory is still 142.6MB. Free memory was 94.1MB in the beginning and 92.6MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:10,007 INFO L158 Benchmark]: Boogie Preprocessor took 25.42ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 91.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-16 18:11:10,008 INFO L158 Benchmark]: IcfgBuilder took 214.96ms. Allocated memory is still 142.6MB. Free memory was 91.6MB in the beginning and 78.4MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:10,008 INFO L158 Benchmark]: TraceAbstraction took 9348.12ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 77.4MB in the beginning and 182.4MB in the end (delta: -105.0MB). Peak memory consumption was 100.3MB. Max. memory is 16.1GB. [2025-03-16 18:11:10,008 INFO L158 Benchmark]: Witness Printer took 95.90ms. Allocated memory is still 343.9MB. Free memory was 182.4MB in the beginning and 174.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-16 18:11:10,009 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 201.3MB. Free memory is still 116.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.02ms. Allocated memory is still 142.6MB. Free memory was 105.4MB in the beginning and 94.1MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.78ms. Allocated memory is still 142.6MB. Free memory was 94.1MB in the beginning and 92.6MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.42ms. Allocated memory is still 142.6MB. Free memory was 92.6MB in the beginning and 91.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 214.96ms. Allocated memory is still 142.6MB. Free memory was 91.6MB in the beginning and 78.4MB in the end (delta: 13.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9348.12ms. Allocated memory was 142.6MB in the beginning and 343.9MB in the end (delta: 201.3MB). Free memory was 77.4MB in the beginning and 182.4MB in the end (delta: -105.0MB). Peak memory consumption was 100.3MB. Max. memory is 16.1GB. * Witness Printer took 95.90ms. Allocated memory is still 343.9MB. Free memory was 182.4MB in the beginning and 174.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=2, y=3] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=2, y=3] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=2, b=3, counter=0, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L34] EXPR counter++ VAL [a=2, b=3, counter=1, p=1, q=0, r=0, s=1, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=2, b=3, c=2, counter=1, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L41] EXPR counter++ VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [a=2, b=3, c=2, counter=2, k=0, p=1, q=0, r=0, s=1, x=2, y=3] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] COND TRUE counter++<5 [L34] EXPR counter++ VAL [a=3, b=2, counter=3, p=0, q=1, r=1, s=0, x=2, y=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=3, k=0, p=0, q=1, r=1, s=0, x=2, y=3] [L41] COND TRUE counter++<5 [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=4, k=0, p=0, q=1, r=1, s=0, x=2, y=3] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L48] COND TRUE counter++<5 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, v=2, x=2, y=3] [L59] c = c - v [L60] k = k + d [L41] COND TRUE counter++<5 [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=6, k=1, p=0, q=1, r=1, s=0, x=2, y=3] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k [L34] COND TRUE counter++<5 [L34] EXPR counter++ VAL [a=2, b=1, counter=7, p=1, q=-1, r=0, s=1, x=2, y=3] [L34] COND FALSE !(counter++<5) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=7] [L11] COND TRUE !(cond) VAL [\old(cond)=0, counter=7] [L13] reach_error() VAL [\old(cond)=0, counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 55 edges, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.3s, OverallIterations: 18, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 740 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 691 mSDsluCounter, 3201 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2507 mSDsCounter, 254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1289 IncrementalHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 254 mSolverCounterUnsat, 694 mSDtfsCounter, 1289 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 686 GetRequests, 536 SyntacticMatches, 18 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=433occurred in iteration=17, InterpolantAutomatonStates: 135, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 336 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1022 NumberOfCodeBlocks, 1022 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 841 ConstructedInterpolants, 16 QuantifiedInterpolants, 3513 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1380 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 28 InterpolantComputations, 10 PerfectInterpolantSequences, 281/373 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-03-16 18:11:10,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE