./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/EvenOdd01-1.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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:42:16,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:42:16,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:42:16,341 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:42:16,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:42:16,364 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:42:16,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:42:16,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:42:16,365 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:42:16,365 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:42:16,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:42:16,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:42:16,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:42:16,366 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:42:16,367 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:42:16,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:42:16,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:42:16,368 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:42:16,369 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:16,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:42:16,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:42:16,370 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:42:16,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:42:16,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:42:16,370 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:42:16,370 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:42:16,370 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:42:16,370 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 -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2025-03-08 05:42:16,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:42:16,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:42:16,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:42:16,582 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:42:16,582 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:42:16,582 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2025-03-08 05:42:17,701 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e964bef/662438ef8e374a64a973dc70cd1c68a5/FLAG5abb6c4dd [2025-03-08 05:42:17,913 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:42:17,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2025-03-08 05:42:17,921 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e964bef/662438ef8e374a64a973dc70cd1c68a5/FLAG5abb6c4dd [2025-03-08 05:42:18,283 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61e964bef/662438ef8e374a64a973dc70cd1c68a5 [2025-03-08 05:42:18,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:42:18,288 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:42:18,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:18,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:42:18,294 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:42:18,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d16223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18, skipping insertion in model container [2025-03-08 05:42:18,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:42:18,418 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2025-03-08 05:42:18,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:18,429 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:42:18,439 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2025-03-08 05:42:18,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:42:18,450 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:42:18,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18 WrapperNode [2025-03-08 05:42:18,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:42:18,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:18,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:42:18,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:42:18,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,473 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2025-03-08 05:42:18,473 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:42:18,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:42:18,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:42:18,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:42:18,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,480 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,492 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]. [2025-03-08 05:42:18,493 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,495 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,495 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,497 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:42:18,500 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:42:18,500 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:42:18,500 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:42:18,501 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (1/1) ... [2025-03-08 05:42:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:42:18,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:18,524 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) [2025-03-08 05:42:18,527 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 [2025-03-08 05:42:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:42:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2025-03-08 05:42:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2025-03-08 05:42:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:42:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2025-03-08 05:42:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2025-03-08 05:42:18,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:42:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:42:18,590 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:42:18,592 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:42:18,640 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L34: havoc #t~ret5; [2025-03-08 05:42:18,649 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret4; [2025-03-08 05:42:18,688 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-03-08 05:42:18,688 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:42:18,694 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:42:18,695 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:42:18,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:18 BoogieIcfgContainer [2025-03-08 05:42:18,695 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:42:18,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:42:18,697 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:42:18,700 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:42:18,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:42:18" (1/3) ... [2025-03-08 05:42:18,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fe6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:18, skipping insertion in model container [2025-03-08 05:42:18,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:42:18" (2/3) ... [2025-03-08 05:42:18,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fe6e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:42:18, skipping insertion in model container [2025-03-08 05:42:18,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:42:18" (3/3) ... [2025-03-08 05:42:18,703 INFO L128 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2025-03-08 05:42:18,714 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:42:18,715 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG EvenOdd01-1.c that has 3 procedures, 25 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:42:18,747 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:42:18,755 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;@2abf6020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:42:18,755 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:42:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-08 05:42:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:42:18,762 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:18,762 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:18,762 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:18,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1488382946, now seen corresponding path program 1 times [2025-03-08 05:42:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:18,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078341883] [2025-03-08 05:42:18,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:18,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:18,814 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:42:18,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:42:18,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:18,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:42:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:19,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078341883] [2025-03-08 05:42:19,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078341883] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:19,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:19,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 05:42:19,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436339934] [2025-03-08 05:42:19,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:19,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 05:42:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:19,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 05:42:19,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:42:19,207 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:19,291 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2025-03-08 05:42:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:42:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 05:42:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:19,298 INFO L225 Difference]: With dead ends: 36 [2025-03-08 05:42:19,298 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 05:42:19,300 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:42:19,302 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:19,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 97 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 05:42:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-03-08 05:42:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 05:42:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2025-03-08 05:42:19,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2025-03-08 05:42:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:19,329 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2025-03-08 05:42:19,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2025-03-08 05:42:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-08 05:42:19,331 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:19,331 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:19,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:42:19,331 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:19,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -293200320, now seen corresponding path program 1 times [2025-03-08 05:42:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:19,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247788060] [2025-03-08 05:42:19,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:19,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-08 05:42:19,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-08 05:42:19,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:19,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:42:19,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247788060] [2025-03-08 05:42:19,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247788060] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:19,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:19,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 05:42:19,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918143515] [2025-03-08 05:42:19,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:19,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 05:42:19,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:19,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 05:42:19,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:42:19,533 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:19,575 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2025-03-08 05:42:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 05:42:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-03-08 05:42:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:19,576 INFO L225 Difference]: With dead ends: 30 [2025-03-08 05:42:19,576 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 05:42:19,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 05:42:19,577 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:19,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 05:42:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-03-08 05:42:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 05:42:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2025-03-08 05:42:19,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2025-03-08 05:42:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:19,585 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2025-03-08 05:42:19,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:42:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2025-03-08 05:42:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-03-08 05:42:19,586 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:19,586 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:19,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:42:19,586 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:19,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:19,587 INFO L85 PathProgramCache]: Analyzing trace with hash -797868090, now seen corresponding path program 1 times [2025-03-08 05:42:19,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:19,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323880046] [2025-03-08 05:42:19,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:19,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:19,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 05:42:19,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 05:42:19,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:19,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:42:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323880046] [2025-03-08 05:42:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323880046] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:19,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:19,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766588237] [2025-03-08 05:42:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:19,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:19,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:19,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:19,632 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:42:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:19,660 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2025-03-08 05:42:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-03-08 05:42:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:19,661 INFO L225 Difference]: With dead ends: 38 [2025-03-08 05:42:19,661 INFO L226 Difference]: Without dead ends: 26 [2025-03-08 05:42:19,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:19,662 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 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 [2025-03-08 05:42:19,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-08 05:42:19,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-03-08 05:42:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-03-08 05:42:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-03-08 05:42:19,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2025-03-08 05:42:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:19,665 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-03-08 05:42:19,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:42:19,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-03-08 05:42:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-03-08 05:42:19,666 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:19,666 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:19,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 05:42:19,666 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:19,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1410627175, now seen corresponding path program 1 times [2025-03-08 05:42:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:19,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719884683] [2025-03-08 05:42:19,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:19,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:19,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 05:42:19,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 05:42:19,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:19,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:42:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:19,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719884683] [2025-03-08 05:42:19,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719884683] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:19,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:19,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 05:42:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642290133] [2025-03-08 05:42:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:19,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 05:42:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:19,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 05:42:19,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2025-03-08 05:42:19,819 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:42:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:19,912 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2025-03-08 05:42:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:42:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2025-03-08 05:42:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:19,913 INFO L225 Difference]: With dead ends: 33 [2025-03-08 05:42:19,913 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:42:19,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:42:19,914 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:19,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:42:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:42:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 05:42:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2025-03-08 05:42:19,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2025-03-08 05:42:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:19,918 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2025-03-08 05:42:19,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-08 05:42:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2025-03-08 05:42:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-08 05:42:19,919 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:19,919 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:19,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 05:42:19,919 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:19,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 547077751, now seen corresponding path program 1 times [2025-03-08 05:42:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:19,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948084819] [2025-03-08 05:42:19,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:19,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 05:42:19,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 05:42:19,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:19,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:42:19,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948084819] [2025-03-08 05:42:19,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948084819] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:42:19,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:42:19,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:42:19,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201871649] [2025-03-08 05:42:19,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:42:19,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:42:19,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:19,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:42:19,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:19,955 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:42:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:19,981 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2025-03-08 05:42:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:42:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2025-03-08 05:42:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:19,982 INFO L225 Difference]: With dead ends: 41 [2025-03-08 05:42:19,982 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:42:19,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:42:19,982 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:19,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:42:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:42:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:42:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2025-03-08 05:42:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2025-03-08 05:42:19,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2025-03-08 05:42:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:19,989 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2025-03-08 05:42:19,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-08 05:42:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2025-03-08 05:42:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-08 05:42:19,990 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:19,991 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, 1, 1] [2025-03-08 05:42:19,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 05:42:19,991 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:19,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:19,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2090856625, now seen corresponding path program 1 times [2025-03-08 05:42:19,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:19,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774958414] [2025-03-08 05:42:19,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:19,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:19,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:42:19,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:42:19,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:20,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:42:20,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774958414] [2025-03-08 05:42:20,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774958414] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:20,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874538995] [2025-03-08 05:42:20,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:20,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:20,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:20,266 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) [2025-03-08 05:42:20,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:42:20,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 05:42:20,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 05:42:20,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:20,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:20,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 05:42:20,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 05:42:20,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:42:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874538995] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:20,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2025-03-08 05:42:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692253765] [2025-03-08 05:42:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:20,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 05:42:20,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:20,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 05:42:20,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2025-03-08 05:42:20,914 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:42:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:21,065 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2025-03-08 05:42:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 05:42:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2025-03-08 05:42:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:21,066 INFO L225 Difference]: With dead ends: 39 [2025-03-08 05:42:21,066 INFO L226 Difference]: Without dead ends: 35 [2025-03-08 05:42:21,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2025-03-08 05:42:21,067 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:21,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 178 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-03-08 05:42:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2025-03-08 05:42:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-08 05:42:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2025-03-08 05:42:21,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2025-03-08 05:42:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:21,071 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2025-03-08 05:42:21,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-03-08 05:42:21,071 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2025-03-08 05:42:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-08 05:42:21,071 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:21,072 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:21,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:21,276 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,SelfDestructingSolverStorable5 [2025-03-08 05:42:21,276 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:21,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:21,277 INFO L85 PathProgramCache]: Analyzing trace with hash -361196562, now seen corresponding path program 1 times [2025-03-08 05:42:21,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:21,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794077883] [2025-03-08 05:42:21,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:21,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:21,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 05:42:21,285 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 05:42:21,287 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:21,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-08 05:42:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794077883] [2025-03-08 05:42:21,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794077883] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78804545] [2025-03-08 05:42:21,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:42:21,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:21,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:21,526 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) [2025-03-08 05:42:21,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:42:21,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 05:42:21,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 05:42:21,557 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:42:21,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:21,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 05:42:21,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-08 05:42:21,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 05:42:22,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78804545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:22,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:22,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 36 [2025-03-08 05:42:22,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850058198] [2025-03-08 05:42:22,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:22,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-08 05:42:22,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:22,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-08 05:42:22,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2025-03-08 05:42:22,575 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 24 states have internal predecessors, (52), 7 states have call successors, (7), 1 states have call predecessors, (7), 12 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-08 05:42:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:22,909 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2025-03-08 05:42:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 05:42:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 24 states have internal predecessors, (52), 7 states have call successors, (7), 1 states have call predecessors, (7), 12 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) Word has length 33 [2025-03-08 05:42:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:22,910 INFO L225 Difference]: With dead ends: 45 [2025-03-08 05:42:22,910 INFO L226 Difference]: Without dead ends: 41 [2025-03-08 05:42:22,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2025-03-08 05:42:22,911 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:22,911 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 325 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-08 05:42:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2025-03-08 05:42:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2025-03-08 05:42:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2025-03-08 05:42:22,918 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2025-03-08 05:42:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:22,918 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2025-03-08 05:42:22,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 24 states have internal predecessors, (52), 7 states have call successors, (7), 1 states have call predecessors, (7), 12 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2025-03-08 05:42:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2025-03-08 05:42:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-08 05:42:22,919 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:22,919 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:22,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:42:23,125 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,SelfDestructingSolverStorable6 [2025-03-08 05:42:23,125 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:23,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash -114440610, now seen corresponding path program 2 times [2025-03-08 05:42:23,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:23,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485595489] [2025-03-08 05:42:23,126 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:23,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:23,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-08 05:42:23,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 05:42:23,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:23,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 05:42:23,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485595489] [2025-03-08 05:42:23,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485595489] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:23,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566447604] [2025-03-08 05:42:23,384 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:23,386 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) [2025-03-08 05:42:23,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:42:23,416 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-08 05:42:23,427 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 05:42:23,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:23,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:23,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-08 05:42:23,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-08 05:42:23,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:42:24,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566447604] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:24,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:24,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 27 [2025-03-08 05:42:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89458054] [2025-03-08 05:42:24,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:24,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:42:24,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:24,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:42:24,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:42:24,053 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 19 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-08 05:42:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:24,276 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2025-03-08 05:42:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:42:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 19 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 40 [2025-03-08 05:42:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:24,278 INFO L225 Difference]: With dead ends: 51 [2025-03-08 05:42:24,278 INFO L226 Difference]: Without dead ends: 47 [2025-03-08 05:42:24,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2025-03-08 05:42:24,280 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:24,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 253 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:42:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-03-08 05:42:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2025-03-08 05:42:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-08 05:42:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2025-03-08 05:42:24,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2025-03-08 05:42:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:24,285 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2025-03-08 05:42:24,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 19 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2025-03-08 05:42:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2025-03-08 05:42:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-08 05:42:24,286 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:24,286 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:24,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:24,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:24,488 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:24,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -431270589, now seen corresponding path program 2 times [2025-03-08 05:42:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:24,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327745071] [2025-03-08 05:42:24,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:24,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-08 05:42:24,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 05:42:24,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:24,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 05:42:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327745071] [2025-03-08 05:42:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327745071] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397184348] [2025-03-08 05:42:24,765 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:42:24,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:24,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:24,767 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) [2025-03-08 05:42:24,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:42:24,792 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 47 statements into 2 equivalence classes. [2025-03-08 05:42:24,805 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 05:42:24,805 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:42:24,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:24,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-08 05:42:24,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 05:42:25,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:42:26,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397184348] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:26,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:26,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 21] total 50 [2025-03-08 05:42:26,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747904381] [2025-03-08 05:42:26,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:26,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-03-08 05:42:26,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:26,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-03-08 05:42:26,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2025-03-08 05:42:26,490 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 50 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 32 states have internal predecessors, (70), 9 states have call successors, (9), 1 states have call predecessors, (9), 18 states have return successors, (18), 18 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-08 05:42:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:26,968 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2025-03-08 05:42:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 05:42:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 32 states have internal predecessors, (70), 9 states have call successors, (9), 1 states have call predecessors, (9), 18 states have return successors, (18), 18 states have call predecessors, (18), 9 states have call successors, (18) Word has length 47 [2025-03-08 05:42:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:26,969 INFO L225 Difference]: With dead ends: 57 [2025-03-08 05:42:26,969 INFO L226 Difference]: Without dead ends: 53 [2025-03-08 05:42:26,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=3494, Unknown=0, NotChecked=0, Total=3782 [2025-03-08 05:42:26,970 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:26,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 505 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:42:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-08 05:42:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2025-03-08 05:42:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-08 05:42:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2025-03-08 05:42:26,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2025-03-08 05:42:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:26,975 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2025-03-08 05:42:26,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 32 states have internal predecessors, (70), 9 states have call successors, (9), 1 states have call predecessors, (9), 18 states have return successors, (18), 18 states have call predecessors, (18), 9 states have call successors, (18) [2025-03-08 05:42:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2025-03-08 05:42:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-03-08 05:42:26,977 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:26,979 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:26,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:27,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:27,179 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:27,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:27,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1283625837, now seen corresponding path program 3 times [2025-03-08 05:42:27,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:27,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305188677] [2025-03-08 05:42:27,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:27,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:27,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 4 equivalence classes. [2025-03-08 05:42:27,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 05:42:27,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:42:27,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-08 05:42:27,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305188677] [2025-03-08 05:42:27,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305188677] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:27,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225535099] [2025-03-08 05:42:27,544 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:27,546 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) [2025-03-08 05:42:27,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:42:27,580 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 4 equivalence classes. [2025-03-08 05:42:27,593 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 05:42:27,593 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:42:27,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:27,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-03-08 05:42:27,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-08 05:42:27,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-08 05:42:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225535099] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:28,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 33 [2025-03-08 05:42:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39788518] [2025-03-08 05:42:28,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:28,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 05:42:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:28,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 05:42:28,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:42:28,435 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2025-03-08 05:42:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:28,740 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2025-03-08 05:42:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 05:42:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.75) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 54 [2025-03-08 05:42:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:28,741 INFO L225 Difference]: With dead ends: 63 [2025-03-08 05:42:28,741 INFO L226 Difference]: Without dead ends: 59 [2025-03-08 05:42:28,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2025-03-08 05:42:28,742 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:28,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 348 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-08 05:42:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2025-03-08 05:42:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-08 05:42:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2025-03-08 05:42:28,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2025-03-08 05:42:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:28,748 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2025-03-08 05:42:28,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.75) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2025-03-08 05:42:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2025-03-08 05:42:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-08 05:42:28,748 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:28,749 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:28,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 05:42:28,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 05:42:28,950 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:28,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash -426459752, now seen corresponding path program 3 times [2025-03-08 05:42:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466746922] [2025-03-08 05:42:28,951 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:28,954 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 61 statements into 4 equivalence classes. [2025-03-08 05:42:28,961 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 61 of 61 statements. [2025-03-08 05:42:28,961 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:42:28,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-08 05:42:29,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466746922] [2025-03-08 05:42:29,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466746922] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111511390] [2025-03-08 05:42:29,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:42:29,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:29,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:29,310 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) [2025-03-08 05:42:29,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:42:29,344 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 61 statements into 4 equivalence classes. [2025-03-08 05:42:29,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 61 of 61 statements. [2025-03-08 05:42:29,357 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 05:42:29,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:29,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 56 conjuncts are in the unsatisfiable core [2025-03-08 05:42:29,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-08 05:42:29,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:42:32,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111511390] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:32,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 65 [2025-03-08 05:42:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933189292] [2025-03-08 05:42:32,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:32,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-03-08 05:42:32,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:32,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-03-08 05:42:32,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3910, Unknown=0, NotChecked=0, Total=4160 [2025-03-08 05:42:32,047 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 41 states have internal predecessors, (90), 11 states have call successors, (11), 1 states have call predecessors, (11), 24 states have return successors, (24), 24 states have call predecessors, (24), 11 states have call successors, (24) [2025-03-08 05:42:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:32,648 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2025-03-08 05:42:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:42:32,648 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.40625) internal successors, (90), 41 states have internal predecessors, (90), 11 states have call successors, (11), 1 states have call predecessors, (11), 24 states have return successors, (24), 24 states have call predecessors, (24), 11 states have call successors, (24) Word has length 61 [2025-03-08 05:42:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:32,649 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:42:32,649 INFO L226 Difference]: Without dead ends: 65 [2025-03-08 05:42:32,650 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=413, Invalid=6067, Unknown=0, NotChecked=0, Total=6480 [2025-03-08 05:42:32,651 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:32,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 578 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:42:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-08 05:42:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2025-03-08 05:42:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2025-03-08 05:42:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2025-03-08 05:42:32,657 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2025-03-08 05:42:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:32,657 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2025-03-08 05:42:32,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.40625) internal successors, (90), 41 states have internal predecessors, (90), 11 states have call successors, (11), 1 states have call predecessors, (11), 24 states have return successors, (24), 24 states have call predecessors, (24), 11 states have call successors, (24) [2025-03-08 05:42:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2025-03-08 05:42:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-08 05:42:32,659 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:32,660 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:32,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 05:42:32,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:32,860 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:32,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1907767684, now seen corresponding path program 4 times [2025-03-08 05:42:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916356376] [2025-03-08 05:42:32,861 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:32,865 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 68 statements into 2 equivalence classes. [2025-03-08 05:42:32,870 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 05:42:32,870 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:32,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-08 05:42:33,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916356376] [2025-03-08 05:42:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916356376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183084119] [2025-03-08 05:42:33,431 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:33,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:33,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:33,433 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) [2025-03-08 05:42:33,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:42:33,491 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 68 statements into 2 equivalence classes. [2025-03-08 05:42:33,507 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 68 of 68 statements. [2025-03-08 05:42:33,507 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:33,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:33,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-03-08 05:42:33,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2025-03-08 05:42:33,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-08 05:42:34,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183084119] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:34,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:34,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 30] total 37 [2025-03-08 05:42:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236477450] [2025-03-08 05:42:34,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:34,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-08 05:42:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:34,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-08 05:42:34,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2025-03-08 05:42:34,817 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 37 states, 36 states have (on average 1.75) internal successors, (63), 26 states have internal predecessors, (63), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:42:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:35,237 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2025-03-08 05:42:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 05:42:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 26 states have internal predecessors, (63), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 68 [2025-03-08 05:42:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:35,238 INFO L225 Difference]: With dead ends: 75 [2025-03-08 05:42:35,238 INFO L226 Difference]: Without dead ends: 71 [2025-03-08 05:42:35,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2025-03-08 05:42:35,240 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:35,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 410 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:42:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-08 05:42:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2025-03-08 05:42:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2025-03-08 05:42:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2025-03-08 05:42:35,249 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2025-03-08 05:42:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:35,250 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2025-03-08 05:42:35,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 26 states have internal predecessors, (63), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-08 05:42:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2025-03-08 05:42:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2025-03-08 05:42:35,250 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:35,250 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:35,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 05:42:35,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:35,451 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:35,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash -880952083, now seen corresponding path program 4 times [2025-03-08 05:42:35,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:35,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332913955] [2025-03-08 05:42:35,451 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:35,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:35,455 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 75 statements into 2 equivalence classes. [2025-03-08 05:42:35,459 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 05:42:35,459 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:35,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 05:42:35,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:35,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332913955] [2025-03-08 05:42:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332913955] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:35,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021537363] [2025-03-08 05:42:35,985 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:42:35,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:35,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:35,987 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) [2025-03-08 05:42:35,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:42:36,048 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 75 statements into 2 equivalence classes. [2025-03-08 05:42:36,065 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-03-08 05:42:36,065 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:42:36,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:36,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 88 conjuncts are in the unsatisfiable core [2025-03-08 05:42:36,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-08 05:42:36,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:42:37,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021537363] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:37,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 33] total 61 [2025-03-08 05:42:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972923660] [2025-03-08 05:42:37,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:37,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2025-03-08 05:42:37,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:37,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2025-03-08 05:42:37,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3441, Unknown=0, NotChecked=0, Total=3660 [2025-03-08 05:42:37,975 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 61 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 39 states have internal predecessors, (89), 13 states have call successors, (13), 1 states have call predecessors, (13), 21 states have return successors, (30), 22 states have call predecessors, (30), 13 states have call successors, (30) [2025-03-08 05:42:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:38,605 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2025-03-08 05:42:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 05:42:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 39 states have internal predecessors, (89), 13 states have call successors, (13), 1 states have call predecessors, (13), 21 states have return successors, (30), 22 states have call predecessors, (30), 13 states have call successors, (30) Word has length 75 [2025-03-08 05:42:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:38,606 INFO L225 Difference]: With dead ends: 81 [2025-03-08 05:42:38,606 INFO L226 Difference]: Without dead ends: 77 [2025-03-08 05:42:38,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=5753, Unknown=0, NotChecked=0, Total=6162 [2025-03-08 05:42:38,608 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:38,608 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 576 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:42:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-08 05:42:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2025-03-08 05:42:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2025-03-08 05:42:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2025-03-08 05:42:38,614 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2025-03-08 05:42:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:38,614 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2025-03-08 05:42:38,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 39 states have internal predecessors, (89), 13 states have call successors, (13), 1 states have call predecessors, (13), 21 states have return successors, (30), 22 states have call predecessors, (30), 13 states have call successors, (30) [2025-03-08 05:42:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2025-03-08 05:42:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-08 05:42:38,615 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:38,615 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:38,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:38,816 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,SelfDestructingSolverStorable12 [2025-03-08 05:42:38,816 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:38,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1899581557, now seen corresponding path program 5 times [2025-03-08 05:42:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493723835] [2025-03-08 05:42:38,816 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:38,820 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 82 statements into 6 equivalence classes. [2025-03-08 05:42:38,829 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 05:42:38,829 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:42:38,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-08 05:42:39,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493723835] [2025-03-08 05:42:39,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493723835] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817719198] [2025-03-08 05:42:39,417 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:39,420 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) [2025-03-08 05:42:39,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:42:39,478 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 82 statements into 6 equivalence classes. [2025-03-08 05:42:39,493 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 82 of 82 statements. [2025-03-08 05:42:39,493 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:42:39,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:39,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-03-08 05:42:39,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-08 05:42:39,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-08 05:42:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817719198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:41,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:41,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 36] total 43 [2025-03-08 05:42:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590131717] [2025-03-08 05:42:41,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:41,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 05:42:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:41,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 05:42:41,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 05:42:41,139 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 30 states have internal predecessors, (73), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2025-03-08 05:42:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:41,782 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2025-03-08 05:42:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 05:42:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 30 states have internal predecessors, (73), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) Word has length 82 [2025-03-08 05:42:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:41,784 INFO L225 Difference]: With dead ends: 87 [2025-03-08 05:42:41,784 INFO L226 Difference]: Without dead ends: 83 [2025-03-08 05:42:41,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 147 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=3568, Unknown=0, NotChecked=0, Total=3906 [2025-03-08 05:42:41,785 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:41,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 585 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:42:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-08 05:42:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2025-03-08 05:42:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2025-03-08 05:42:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2025-03-08 05:42:41,798 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2025-03-08 05:42:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:41,799 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2025-03-08 05:42:41,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 30 states have internal predecessors, (73), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2025-03-08 05:42:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2025-03-08 05:42:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-08 05:42:41,799 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:41,800 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:41,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:42:42,000 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,SelfDestructingSolverStorable13 [2025-03-08 05:42:42,000 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:42,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2027470014, now seen corresponding path program 5 times [2025-03-08 05:42:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:42,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254188435] [2025-03-08 05:42:42,001 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:42,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:42,005 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 89 statements into 6 equivalence classes. [2025-03-08 05:42:42,017 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 89 of 89 statements. [2025-03-08 05:42:42,018 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:42:42,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2025-03-08 05:42:42,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:42,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254188435] [2025-03-08 05:42:42,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254188435] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:42,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138784787] [2025-03-08 05:42:42,492 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:42:42,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:42,494 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) [2025-03-08 05:42:42,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:42:42,557 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 89 statements into 6 equivalence classes. [2025-03-08 05:42:42,574 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 89 of 89 statements. [2025-03-08 05:42:42,574 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-08 05:42:42,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:42,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 80 conjuncts are in the unsatisfiable core [2025-03-08 05:42:42,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2025-03-08 05:42:43,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-08 05:42:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138784787] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:49,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 39] total 92 [2025-03-08 05:42:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188160679] [2025-03-08 05:42:49,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:49,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2025-03-08 05:42:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:49,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2025-03-08 05:42:49,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=8008, Unknown=0, NotChecked=0, Total=8372 [2025-03-08 05:42:49,781 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 92 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 56 states have internal predecessors, (124), 15 states have call successors, (15), 1 states have call predecessors, (15), 36 states have return successors, (36), 36 states have call predecessors, (36), 15 states have call successors, (36) [2025-03-08 05:42:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:51,050 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2025-03-08 05:42:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 05:42:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 56 states have internal predecessors, (124), 15 states have call successors, (15), 1 states have call predecessors, (15), 36 states have return successors, (36), 36 states have call predecessors, (36), 15 states have call successors, (36) Word has length 89 [2025-03-08 05:42:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:51,051 INFO L225 Difference]: With dead ends: 93 [2025-03-08 05:42:51,051 INFO L226 Difference]: Without dead ends: 89 [2025-03-08 05:42:51,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=649, Invalid=12691, Unknown=0, NotChecked=0, Total=13340 [2025-03-08 05:42:51,053 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:51,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1267 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 05:42:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-08 05:42:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2025-03-08 05:42:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2025-03-08 05:42:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2025-03-08 05:42:51,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2025-03-08 05:42:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:51,062 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2025-03-08 05:42:51,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 56 states have internal predecessors, (124), 15 states have call successors, (15), 1 states have call predecessors, (15), 36 states have return successors, (36), 36 states have call predecessors, (36), 15 states have call successors, (36) [2025-03-08 05:42:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2025-03-08 05:42:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2025-03-08 05:42:51,063 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:51,063 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:51,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:42:51,263 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,SelfDestructingSolverStorable14 [2025-03-08 05:42:51,264 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:51,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2003525990, now seen corresponding path program 6 times [2025-03-08 05:42:51,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:51,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334538916] [2025-03-08 05:42:51,264 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:51,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:51,270 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 96 statements into 7 equivalence classes. [2025-03-08 05:42:51,281 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 96 of 96 statements. [2025-03-08 05:42:51,281 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:42:51,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2025-03-08 05:42:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334538916] [2025-03-08 05:42:51,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334538916] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253942405] [2025-03-08 05:42:51,884 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:51,886 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) [2025-03-08 05:42:51,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:42:52,003 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 96 statements into 7 equivalence classes. [2025-03-08 05:42:52,020 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 96 of 96 statements. [2025-03-08 05:42:52,020 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:42:52,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:52,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 112 conjuncts are in the unsatisfiable core [2025-03-08 05:42:52,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-08 05:42:52,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:42:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-08 05:42:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253942405] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:42:54,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:42:54,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 42] total 51 [2025-03-08 05:42:54,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468669956] [2025-03-08 05:42:54,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:42:54,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-08 05:42:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:42:54,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-08 05:42:54,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2025-03-08 05:42:54,019 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 51 states, 50 states have (on average 1.72) internal successors, (86), 35 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2025-03-08 05:42:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:42:54,675 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2025-03-08 05:42:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-08 05:42:54,675 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.72) internal successors, (86), 35 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) Word has length 96 [2025-03-08 05:42:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:42:54,676 INFO L225 Difference]: With dead ends: 99 [2025-03-08 05:42:54,676 INFO L226 Difference]: Without dead ends: 95 [2025-03-08 05:42:54,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=447, Invalid=5103, Unknown=0, NotChecked=0, Total=5550 [2025-03-08 05:42:54,678 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:42:54,678 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 650 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:42:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-08 05:42:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2025-03-08 05:42:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2025-03-08 05:42:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2025-03-08 05:42:54,688 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2025-03-08 05:42:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:42:54,688 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2025-03-08 05:42:54,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.72) internal successors, (86), 35 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2025-03-08 05:42:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2025-03-08 05:42:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-03-08 05:42:54,689 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:42:54,689 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:42:54,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:42:54,889 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,SelfDestructingSolverStorable15 [2025-03-08 05:42:54,890 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:42:54,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:42:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1767227241, now seen corresponding path program 6 times [2025-03-08 05:42:54,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:42:54,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604696381] [2025-03-08 05:42:54,890 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:42:54,895 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 103 statements into 7 equivalence classes. [2025-03-08 05:42:54,902 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 05:42:54,903 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:42:54,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2025-03-08 05:42:55,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:42:55,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604696381] [2025-03-08 05:42:55,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604696381] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:42:55,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969064124] [2025-03-08 05:42:55,295 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:42:55,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:42:55,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:42:55,297 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) [2025-03-08 05:42:55,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:42:55,441 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 103 statements into 7 equivalence classes. [2025-03-08 05:42:55,470 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 103 of 103 statements. [2025-03-08 05:42:55,470 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-08 05:42:55,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:42:55,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 92 conjuncts are in the unsatisfiable core [2025-03-08 05:42:55,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:42:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2025-03-08 05:42:56,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2025-03-08 05:43:05,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969064124] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:05,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 34, 45] total 85 [2025-03-08 05:43:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65701015] [2025-03-08 05:43:05,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:05,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2025-03-08 05:43:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:05,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2025-03-08 05:43:05,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=6853, Unknown=0, NotChecked=0, Total=7140 [2025-03-08 05:43:05,867 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 85 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 54 states have internal predecessors, (121), 18 states have call successors, (18), 1 states have call predecessors, (18), 31 states have return successors, (32), 31 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-08 05:43:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:07,182 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2025-03-08 05:43:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-08 05:43:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 54 states have internal predecessors, (121), 18 states have call successors, (18), 1 states have call predecessors, (18), 31 states have return successors, (32), 31 states have call predecessors, (32), 18 states have call successors, (32) Word has length 103 [2025-03-08 05:43:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:07,184 INFO L225 Difference]: With dead ends: 112 [2025-03-08 05:43:07,184 INFO L226 Difference]: Without dead ends: 60 [2025-03-08 05:43:07,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=728, Invalid=13078, Unknown=0, NotChecked=0, Total=13806 [2025-03-08 05:43:07,185 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:07,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1100 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 05:43:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-08 05:43:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2025-03-08 05:43:07,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2025-03-08 05:43:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2025-03-08 05:43:07,195 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 103 [2025-03-08 05:43:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:07,195 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2025-03-08 05:43:07,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 54 states have internal predecessors, (121), 18 states have call successors, (18), 1 states have call predecessors, (18), 31 states have return successors, (32), 31 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-08 05:43:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2025-03-08 05:43:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-08 05:43:07,196 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:07,196 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:07,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 05:43:07,396 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 [2025-03-08 05:43:07,397 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:07,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash -878255191, now seen corresponding path program 7 times [2025-03-08 05:43:07,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:07,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350780367] [2025-03-08 05:43:07,397 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:07,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-08 05:43:07,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-08 05:43:07,408 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:07,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 05:43:08,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:08,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350780367] [2025-03-08 05:43:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350780367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921879044] [2025-03-08 05:43:08,116 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:43:08,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:08,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:08,117 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) [2025-03-08 05:43:08,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:43:08,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 110 statements into 1 equivalence classes. [2025-03-08 05:43:08,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 110 of 110 statements. [2025-03-08 05:43:08,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:43:08,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:08,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-03-08 05:43:08,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2025-03-08 05:43:08,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2025-03-08 05:43:10,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921879044] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:10,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:10,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 48] total 57 [2025-03-08 05:43:10,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417914192] [2025-03-08 05:43:10,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:10,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-08 05:43:10,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:10,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-08 05:43:10,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 05:43:10,813 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2025-03-08 05:43:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:11,609 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2025-03-08 05:43:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-08 05:43:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 110 [2025-03-08 05:43:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:11,610 INFO L225 Difference]: With dead ends: 70 [2025-03-08 05:43:11,610 INFO L226 Difference]: Without dead ends: 66 [2025-03-08 05:43:11,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=528, Invalid=6612, Unknown=0, NotChecked=0, Total=7140 [2025-03-08 05:43:11,612 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:11,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 731 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:43:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-08 05:43:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-08 05:43:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2025-03-08 05:43:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2025-03-08 05:43:11,619 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 110 [2025-03-08 05:43:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:11,620 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2025-03-08 05:43:11,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2025-03-08 05:43:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2025-03-08 05:43:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-08 05:43:11,620 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:11,621 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:11,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:11,825 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 [2025-03-08 05:43:11,825 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:11,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1749601976, now seen corresponding path program 8 times [2025-03-08 05:43:11,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:11,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85681718] [2025-03-08 05:43:11,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:11,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-08 05:43:11,837 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-08 05:43:11,837 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:11,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2025-03-08 05:43:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85681718] [2025-03-08 05:43:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85681718] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452160685] [2025-03-08 05:43:12,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:43:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:12,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:12,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:43:12,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-08 05:43:12,877 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-08 05:43:12,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:43:12,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:12,879 WARN L254 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 144 conjuncts are in the unsatisfiable core [2025-03-08 05:43:12,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2025-03-08 05:43:13,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-03-08 05:43:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452160685] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:15,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:15,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 54] total 63 [2025-03-08 05:43:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924998600] [2025-03-08 05:43:15,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:15,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2025-03-08 05:43:15,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:15,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2025-03-08 05:43:15,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3691, Unknown=0, NotChecked=0, Total=3906 [2025-03-08 05:43:15,883 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 63 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 43 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (35), 20 states have call predecessors, (35), 20 states have call successors, (35) [2025-03-08 05:43:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:16,940 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2025-03-08 05:43:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-08 05:43:16,940 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 43 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (35), 20 states have call predecessors, (35), 20 states have call successors, (35) Word has length 124 [2025-03-08 05:43:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:16,941 INFO L225 Difference]: With dead ends: 76 [2025-03-08 05:43:16,941 INFO L226 Difference]: Without dead ends: 72 [2025-03-08 05:43:16,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=647, Invalid=8283, Unknown=0, NotChecked=0, Total=8930 [2025-03-08 05:43:16,942 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 166 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:16,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 944 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 05:43:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-08 05:43:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-03-08 05:43:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2025-03-08 05:43:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2025-03-08 05:43:16,950 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2025-03-08 05:43:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:16,950 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2025-03-08 05:43:16,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 43 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (35), 20 states have call predecessors, (35), 20 states have call successors, (35) [2025-03-08 05:43:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2025-03-08 05:43:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2025-03-08 05:43:16,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:16,951 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:16,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:43:17,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:17,151 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:17,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:17,152 INFO L85 PathProgramCache]: Analyzing trace with hash -635588665, now seen corresponding path program 9 times [2025-03-08 05:43:17,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:17,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138033468] [2025-03-08 05:43:17,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:17,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 138 statements into 10 equivalence classes. [2025-03-08 05:43:17,168 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 138 of 138 statements. [2025-03-08 05:43:17,168 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:43:17,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2025-03-08 05:43:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138033468] [2025-03-08 05:43:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138033468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223631042] [2025-03-08 05:43:18,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:43:18,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:18,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:18,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:43:18,380 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 138 statements into 10 equivalence classes. [2025-03-08 05:43:18,402 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 138 of 138 statements. [2025-03-08 05:43:18,403 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:43:18,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:18,405 WARN L254 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 160 conjuncts are in the unsatisfiable core [2025-03-08 05:43:18,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2025-03-08 05:43:18,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-08 05:43:21,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223631042] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:21,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 60] total 69 [2025-03-08 05:43:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059678854] [2025-03-08 05:43:21,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:21,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2025-03-08 05:43:21,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:21,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2025-03-08 05:43:21,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=4455, Unknown=0, NotChecked=0, Total=4692 [2025-03-08 05:43:21,962 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 69 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 47 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (39), 22 states have call predecessors, (39), 22 states have call successors, (39) [2025-03-08 05:43:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:23,132 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2025-03-08 05:43:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-03-08 05:43:23,132 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 47 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (39), 22 states have call predecessors, (39), 22 states have call successors, (39) Word has length 138 [2025-03-08 05:43:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:23,133 INFO L225 Difference]: With dead ends: 82 [2025-03-08 05:43:23,133 INFO L226 Difference]: Without dead ends: 78 [2025-03-08 05:43:23,134 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=759, Invalid=10161, Unknown=0, NotChecked=0, Total=10920 [2025-03-08 05:43:23,134 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 276 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:23,134 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1073 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-08 05:43:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-08 05:43:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-03-08 05:43:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 54 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2025-03-08 05:43:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2025-03-08 05:43:23,145 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 138 [2025-03-08 05:43:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:23,145 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2025-03-08 05:43:23,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.7058823529411764) internal successors, (116), 47 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (39), 22 states have call predecessors, (39), 22 states have call successors, (39) [2025-03-08 05:43:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2025-03-08 05:43:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2025-03-08 05:43:23,146 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:23,146 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:23,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 05:43:23,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:23,350 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:23,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:23,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1289693482, now seen corresponding path program 10 times [2025-03-08 05:43:23,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:23,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431458993] [2025-03-08 05:43:23,351 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:23,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:23,357 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 152 statements into 2 equivalence classes. [2025-03-08 05:43:23,362 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 152 of 152 statements. [2025-03-08 05:43:23,362 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:43:23,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2025-03-08 05:43:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431458993] [2025-03-08 05:43:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431458993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410031639] [2025-03-08 05:43:24,718 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:43:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:24,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:24,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:43:24,954 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 152 statements into 2 equivalence classes. [2025-03-08 05:43:24,977 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 152 of 152 statements. [2025-03-08 05:43:24,977 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 05:43:24,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:24,980 WARN L254 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 176 conjuncts are in the unsatisfiable core [2025-03-08 05:43:24,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2025-03-08 05:43:25,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-08 05:43:29,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410031639] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:29,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:29,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 66] total 73 [2025-03-08 05:43:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427363043] [2025-03-08 05:43:29,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:29,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2025-03-08 05:43:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:29,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2025-03-08 05:43:29,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5008, Unknown=0, NotChecked=0, Total=5256 [2025-03-08 05:43:29,637 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 73 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 50 states have internal predecessors, (123), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (42), 23 states have call predecessors, (42), 24 states have call successors, (42) [2025-03-08 05:43:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:31,185 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2025-03-08 05:43:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-08 05:43:31,185 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 50 states have internal predecessors, (123), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (42), 23 states have call predecessors, (42), 24 states have call successors, (42) Word has length 152 [2025-03-08 05:43:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:31,186 INFO L225 Difference]: With dead ends: 88 [2025-03-08 05:43:31,186 INFO L226 Difference]: Without dead ends: 84 [2025-03-08 05:43:31,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 276 SyntacticMatches, 22 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=848, Invalid=11808, Unknown=0, NotChecked=0, Total=12656 [2025-03-08 05:43:31,187 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 248 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:31,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1166 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 05:43:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-08 05:43:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-03-08 05:43:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2025-03-08 05:43:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2025-03-08 05:43:31,196 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 152 [2025-03-08 05:43:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:31,196 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2025-03-08 05:43:31,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 50 states have internal predecessors, (123), 24 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (42), 23 states have call predecessors, (42), 24 states have call successors, (42) [2025-03-08 05:43:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2025-03-08 05:43:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2025-03-08 05:43:31,197 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:31,197 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:31,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:31,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:31,398 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:31,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:31,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1185256421, now seen corresponding path program 11 times [2025-03-08 05:43:31,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180356789] [2025-03-08 05:43:31,398 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:31,405 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 166 statements into 12 equivalence classes. [2025-03-08 05:43:31,417 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 166 of 166 statements. [2025-03-08 05:43:31,417 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-08 05:43:31,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2025-03-08 05:43:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180356789] [2025-03-08 05:43:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180356789] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200681494] [2025-03-08 05:43:32,759 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:43:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:32,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:32,761 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:32,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:43:33,011 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 166 statements into 12 equivalence classes. [2025-03-08 05:43:33,040 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 166 of 166 statements. [2025-03-08 05:43:33,040 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-03-08 05:43:33,040 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:33,043 WARN L254 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 192 conjuncts are in the unsatisfiable core [2025-03-08 05:43:33,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2025-03-08 05:43:33,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:43:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2025-03-08 05:43:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200681494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:43:38,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:43:38,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 72] total 81 [2025-03-08 05:43:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770161796] [2025-03-08 05:43:38,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:43:38,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2025-03-08 05:43:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:43:38,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2025-03-08 05:43:38,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=6200, Unknown=0, NotChecked=0, Total=6480 [2025-03-08 05:43:38,191 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2025-03-08 05:43:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:43:39,727 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2025-03-08 05:43:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-08 05:43:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 166 [2025-03-08 05:43:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:43:39,730 INFO L225 Difference]: With dead ends: 94 [2025-03-08 05:43:39,730 INFO L226 Difference]: Without dead ends: 90 [2025-03-08 05:43:39,731 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=984, Invalid=14516, Unknown=0, NotChecked=0, Total=15500 [2025-03-08 05:43:39,732 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-08 05:43:39,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1197 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-08 05:43:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-08 05:43:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2025-03-08 05:43:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 62 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2025-03-08 05:43:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2025-03-08 05:43:39,741 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 166 [2025-03-08 05:43:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:43:39,741 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2025-03-08 05:43:39,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2025-03-08 05:43:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2025-03-08 05:43:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2025-03-08 05:43:39,742 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:43:39,742 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:43:39,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 05:43:39,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:39,942 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:43:39,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:43:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1415001844, now seen corresponding path program 12 times [2025-03-08 05:43:39,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:43:39,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526249707] [2025-03-08 05:43:39,943 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:43:39,950 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 180 statements into 13 equivalence classes. [2025-03-08 05:43:39,961 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 180 of 180 statements. [2025-03-08 05:43:39,961 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-08 05:43:39,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2025-03-08 05:43:41,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:43:41,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526249707] [2025-03-08 05:43:41,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526249707] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:43:41,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735287898] [2025-03-08 05:43:41,528 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:43:41,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:43:41,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:43:41,529 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:43:41,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:43:41,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 180 statements into 13 equivalence classes. [2025-03-08 05:43:41,839 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 180 of 180 statements. [2025-03-08 05:43:41,839 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-08 05:43:41,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:43:41,842 WARN L254 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 208 conjuncts are in the unsatisfiable core [2025-03-08 05:43:41,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:43:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2025-03-08 05:43:42,114 INFO L312 TraceCheckSpWp]: Computing backward predicates...