./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.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 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:34:56,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:34:56,487 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:34:56,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:34:56,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:34:56,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:34:56,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:34:56,519 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:34:56,519 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:34:56,519 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:34:56,519 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:34:56,520 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:34:56,520 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:34:56,520 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:34:56,520 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:34:56,520 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:34:56,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:34:56,520 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:34:56,521 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:34:56,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:34:56,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:34:56,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:34:56,523 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:34:56,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:34:56,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:34:56,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:34:56,523 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 -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2025-03-03 14:34:56,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:34:56,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:34:56,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:34:56,748 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:34:56,749 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:34:56,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2025-03-03 14:34:57,855 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30db19eb5/d3a6a1e270984ce287436b79aae7aa57/FLAG4ef6cee51 [2025-03-03 14:34:58,042 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:34:58,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2025-03-03 14:34:58,060 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30db19eb5/d3a6a1e270984ce287436b79aae7aa57/FLAG4ef6cee51 [2025-03-03 14:34:58,076 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30db19eb5/d3a6a1e270984ce287436b79aae7aa57 [2025-03-03 14:34:58,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:34:58,080 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:34:58,082 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:34:58,082 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:34:58,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:34:58,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22820bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58, skipping insertion in model container [2025-03-03 14:34:58,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,098 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:34:58,190 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2025-03-03 14:34:58,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:34:58,198 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:34:58,205 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2025-03-03 14:34:58,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:34:58,213 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:34:58,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58 WrapperNode [2025-03-03 14:34:58,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:34:58,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:34:58,215 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:34:58,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:34:58,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,222 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,230 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:34:58,231 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:34:58,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:34:58,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:34:58,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:34:58,236 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,237 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,242 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:34:58,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,244 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,245 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,247 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:34:58,247 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:34:58,247 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:34:58,247 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:34:58,248 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (1/1) ... [2025-03-03 14:34:58,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:34:58,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:58,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 14:34:58,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 14:34:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:34:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:34:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-03 14:34:58,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-03 14:34:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-03 14:34:58,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-03 14:34:58,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:34:58,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:34:58,328 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:34:58,330 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:34:58,401 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-03 14:34:58,420 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:34:58,428 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 14:34:58,430 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:34:58,436 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:34:58,437 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:34:58,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:58 BoogieIcfgContainer [2025-03-03 14:34:58,437 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:34:58,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:34:58,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:34:58,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:34:58,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:34:58" (1/3) ... [2025-03-03 14:34:58,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a5fa20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:34:58, skipping insertion in model container [2025-03-03 14:34:58,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:34:58" (2/3) ... [2025-03-03 14:34:58,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a5fa20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:34:58, skipping insertion in model container [2025-03-03 14:34:58,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:34:58" (3/3) ... [2025-03-03 14:34:58,446 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2025-03-03 14:34:58,456 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:34:58,458 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_8-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:34:58,499 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:34:58,508 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;@3b76322d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:34:58,509 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:34:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:34:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:34:58,516 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:58,516 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:58,517 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:58,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-03 14:34:58,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:58,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483716850] [2025-03-03 14:34:58,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:58,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:58,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:34:58,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:34:58,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:58,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:34:58,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:58,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483716850] [2025-03-03 14:34:58,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483716850] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:34:58,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:34:58,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:34:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100064864] [2025-03-03 14:34:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:34:58,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:34:58,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:58,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:34:58,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:58,688 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:34:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:58,749 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-03-03 14:34:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:34:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-03 14:34:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:58,754 INFO L225 Difference]: With dead ends: 41 [2025-03-03 14:34:58,754 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:34:58,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:58,760 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:58,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:34:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:34:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:34:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:34:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:34:58,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-03 14:34:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:58,784 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:34:58,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:34:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:34:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:34:58,784 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:58,784 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:58,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:34:58,785 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:58,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-03 14:34:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259739961] [2025-03-03 14:34:58,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:58,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:34:58,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:34:58,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:58,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:34:58,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:58,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259739961] [2025-03-03 14:34:58,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259739961] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:34:58,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:34:58,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:34:58,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377542657] [2025-03-03 14:34:58,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:34:58,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:34:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:58,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:34:58,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:58,842 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:34:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:58,880 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 14:34:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:34:58,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-03 14:34:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:58,882 INFO L225 Difference]: With dead ends: 33 [2025-03-03 14:34:58,882 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:34:58,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:34:58,882 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:58,883 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:34:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:34:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:34:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:34:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:34:58,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-03 14:34:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:58,887 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:34:58,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:34:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:34:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:34:58,888 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:58,888 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:58,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:34:58,888 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:58,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-03 14:34:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367898088] [2025-03-03 14:34:58,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:58,895 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:34:58,901 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:34:58,901 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:58,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:58,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:58,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367898088] [2025-03-03 14:34:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367898088] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286925981] [2025-03-03 14:34:58,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:58,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:58,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:58,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:34:59,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:34:59,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:34:59,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:59,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:59,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:59,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:59,106 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:59,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286925981] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:59,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:59,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 14:34:59,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5822087] [2025-03-03 14:34:59,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:59,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:34:59,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:59,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:34:59,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:34:59,256 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:34:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:59,349 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-03 14:34:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:34:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-03 14:34:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:59,350 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:34:59,350 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:34:59,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:59,351 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:59,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:34:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-03 14:34:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-03 14:34:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-03 14:34:59,357 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-03 14:34:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:59,357 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-03 14:34:59,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:34:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-03 14:34:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:34:59,359 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:59,359 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:59,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:34:59,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:59,559 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:59,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-03 14:34:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:59,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159223161] [2025-03-03 14:34:59,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:59,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:59,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:34:59,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:34:59,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:59,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159223161] [2025-03-03 14:34:59,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159223161] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136575812] [2025-03-03 14:34:59,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:59,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:59,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:59,647 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:59,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:34:59,667 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:34:59,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:34:59,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:59,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:59,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:34:59,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:59,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:34:59,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136575812] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:59,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:59,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-03 14:34:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868292756] [2025-03-03 14:34:59,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:59,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:34:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:59,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:34:59,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:34:59,854 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:34:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:59,948 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 14:34:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:34:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-03 14:34:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:59,949 INFO L225 Difference]: With dead ends: 40 [2025-03-03 14:34:59,949 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 14:34:59,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:34:59,950 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:59,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 14:34:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-03 14:34:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-03 14:34:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-03 14:34:59,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-03 14:34:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:59,957 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-03 14:34:59,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:34:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-03 14:34:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 14:34:59,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:59,960 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:59,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-03 14:35:00,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 14:35:00,160 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:00,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:00,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-03 14:35:00,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:00,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59377124] [2025-03-03 14:35:00,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:00,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:35:00,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:35:00,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:00,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:35:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59377124] [2025-03-03 14:35:00,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59377124] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613462106] [2025-03-03 14:35:00,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:00,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:00,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 14:35:00,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:35:00,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:35:00,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:00,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:00,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:35:00,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-03 14:35:00,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:35:00,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613462106] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:00,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:00,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-03 14:35:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835567563] [2025-03-03 14:35:00,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:00,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:35:00,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:00,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:35:00,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:35:00,650 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:35:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:00,770 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-03 14:35:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:35:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2025-03-03 14:35:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:00,771 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:35:00,771 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:35:00,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:35:00,772 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:00,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:35:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 14:35:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 14:35:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-03 14:35:00,777 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-03 14:35:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:00,778 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-03 14:35:00,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:35:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-03 14:35:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:35:00,779 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:00,779 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:00,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-03 14:35:00,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:00,979 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:00,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-03 14:35:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157526382] [2025-03-03 14:35:00,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:00,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:35:00,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:35:00,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:00,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-03 14:35:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157526382] [2025-03-03 14:35:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157526382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816752918] [2025-03-03 14:35:01,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:01,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:01,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 14:35:01,106 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:35:01,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:35:01,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:01,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:01,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:35:01,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 14:35:01,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-03 14:35:01,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816752918] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:01,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:01,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-03 14:35:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863214914] [2025-03-03 14:35:01,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:01,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:35:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:01,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:35:01,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:35:01,437 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:35:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:01,742 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-03 14:35:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:35:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2025-03-03 14:35:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:01,744 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:35:01,744 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:35:01,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:35:01,745 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:01,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:35:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-03 14:35:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2025-03-03 14:35:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-03 14:35:01,765 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-03 14:35:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:01,765 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-03 14:35:01,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2025-03-03 14:35:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-03 14:35:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 14:35:01,767 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:01,767 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:01,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:01,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:01,967 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:01,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-03 14:35:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:01,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26948988] [2025-03-03 14:35:01,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:01,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:35:01,979 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:35:01,979 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:01,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-03 14:35:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26948988] [2025-03-03 14:35:02,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26948988] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721450018] [2025-03-03 14:35:02,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:02,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:02,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:02,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 14:35:02,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:35:02,087 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:35:02,088 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:02,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:02,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:35:02,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-03 14:35:02,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 14:35:02,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721450018] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:02,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:02,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-03 14:35:02,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793214212] [2025-03-03 14:35:02,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:02,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:35:02,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:02,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:35:02,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:35:02,521 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-03 14:35:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:02,667 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-03 14:35:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:35:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2025-03-03 14:35:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:02,672 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:35:02,672 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 14:35:02,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:35:02,672 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:02,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 14:35:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-03 14:35:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2025-03-03 14:35:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:35:02,685 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-03 14:35:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:02,685 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:35:02,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2025-03-03 14:35:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:35:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:35:02,687 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:02,687 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:02,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 14:35:02,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:02,891 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:02,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-03 14:35:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:02,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527467447] [2025-03-03 14:35:02,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:02,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:35:02,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:35:02,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:02,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-03 14:35:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527467447] [2025-03-03 14:35:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527467447] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471872199] [2025-03-03 14:35:03,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:03,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:03,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:03,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 14:35:03,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:35:03,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:35:03,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:03,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:03,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:35:03,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-03 14:35:03,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-03 14:35:03,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471872199] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:03,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:03,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-03 14:35:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871603499] [2025-03-03 14:35:03,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:03,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:35:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:03,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:35:03,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:35:03,855 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-03 14:35:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:04,332 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-03 14:35:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:35:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 107 [2025-03-03 14:35:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:04,334 INFO L225 Difference]: With dead ends: 177 [2025-03-03 14:35:04,334 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 14:35:04,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:35:04,336 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 97 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:04,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 375 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:35:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 14:35:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-03 14:35:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-03 14:35:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-03 14:35:04,358 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-03 14:35:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:04,358 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-03 14:35:04,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2025-03-03 14:35:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-03 14:35:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-03 14:35:04,361 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:04,361 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:04,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:04,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:04,568 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:04,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 830576147, now seen corresponding path program 1 times [2025-03-03 14:35:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193457369] [2025-03-03 14:35:04,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:04,573 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-03 14:35:04,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-03 14:35:04,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:04,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-03 14:35:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193457369] [2025-03-03 14:35:04,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193457369] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164281494] [2025-03-03 14:35:04,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:35:04,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:04,749 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:04,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:35:04,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-03 14:35:04,813 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-03 14:35:04,813 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:04,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:04,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:04,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 179 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2025-03-03 14:35:04,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 195 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2025-03-03 14:35:05,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164281494] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:05,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:05,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-03 14:35:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290604576] [2025-03-03 14:35:05,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:05,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:35:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:05,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:35:05,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:35:05,792 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:35:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:06,009 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-03 14:35:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:35:06,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 133 [2025-03-03 14:35:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:06,011 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:35:06,011 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 14:35:06,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 250 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:35:06,014 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:06,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 214 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 14:35:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-03 14:35:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-03-03 14:35:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-03 14:35:06,032 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 133 [2025-03-03 14:35:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:06,032 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-03 14:35:06,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:35:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-03 14:35:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2025-03-03 14:35:06,035 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:06,036 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 21, 20, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:06,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:06,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:06,236 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:06,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1043998597, now seen corresponding path program 2 times [2025-03-03 14:35:06,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:06,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140224721] [2025-03-03 14:35:06,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:06,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-03 14:35:06,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-03 14:35:06,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:06,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-03 14:35:06,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:06,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140224721] [2025-03-03 14:35:06,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140224721] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:06,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146674251] [2025-03-03 14:35:06,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:06,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:06,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:06,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:06,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:35:06,702 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-03 14:35:06,754 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-03 14:35:06,754 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:06,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:06,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:06,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-03 14:35:06,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 729 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2025-03-03 14:35:08,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146674251] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:08,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:08,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2025-03-03 14:35:08,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076930452] [2025-03-03 14:35:08,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:08,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:35:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:08,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:35:08,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:35:08,275 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) [2025-03-03 14:35:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:08,433 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-03 14:35:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:35:08,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) Word has length 339 [2025-03-03 14:35:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:08,435 INFO L225 Difference]: With dead ends: 148 [2025-03-03 14:35:08,435 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 14:35:08,436 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 668 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:35:08,436 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:08,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 196 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 14:35:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-03 14:35:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-03-03 14:35:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-03 14:35:08,452 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 339 [2025-03-03 14:35:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:08,453 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-03 14:35:08,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 16 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 8 states have call predecessors, (23), 16 states have call successors, (23) [2025-03-03 14:35:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-03 14:35:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2025-03-03 14:35:08,458 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:08,458 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:08,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-03 14:35:08,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 14:35:08,659 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:08,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2035580874, now seen corresponding path program 3 times [2025-03-03 14:35:08,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:08,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249335312] [2025-03-03 14:35:08,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:08,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:08,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 445 statements into 28 equivalence classes. [2025-03-03 14:35:08,696 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 445 statements. [2025-03-03 14:35:08,697 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:35:08,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 885 proven. 94 refuted. 0 times theorem prover too weak. 4702 trivial. 0 not checked. [2025-03-03 14:35:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249335312] [2025-03-03 14:35:08,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249335312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246703317] [2025-03-03 14:35:08,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:08,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:08,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:35:08,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 445 statements into 28 equivalence classes. [2025-03-03 14:35:08,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 445 statements. [2025-03-03 14:35:08,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:35:08,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:08,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:08,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 989 proven. 96 refuted. 0 times theorem prover too weak. 4596 trivial. 0 not checked. [2025-03-03 14:35:09,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 989 proven. 99 refuted. 0 times theorem prover too weak. 4593 trivial. 0 not checked. [2025-03-03 14:35:10,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246703317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:10,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:10,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 22 [2025-03-03 14:35:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930870343] [2025-03-03 14:35:10,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:10,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:35:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:10,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:35:10,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:35:10,288 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2025-03-03 14:35:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:10,617 INFO L93 Difference]: Finished difference Result 264 states and 533 transitions. [2025-03-03 14:35:10,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:35:10,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 445 [2025-03-03 14:35:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:10,619 INFO L225 Difference]: With dead ends: 264 [2025-03-03 14:35:10,619 INFO L226 Difference]: Without dead ends: 152 [2025-03-03 14:35:10,621 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 876 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:35:10,622 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:10,623 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 191 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-03 14:35:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 129. [2025-03-03 14:35:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 86 states have (on average 1.127906976744186) internal successors, (97), 85 states have internal predecessors, (97), 22 states have call successors, (22), 11 states have call predecessors, (22), 20 states have return successors, (97), 32 states have call predecessors, (97), 22 states have call successors, (97) [2025-03-03 14:35:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 216 transitions. [2025-03-03 14:35:10,634 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 216 transitions. Word has length 445 [2025-03-03 14:35:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:10,635 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 216 transitions. [2025-03-03 14:35:10,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 13 states have call successors, (22), 1 states have call predecessors, (22), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2025-03-03 14:35:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 216 transitions. [2025-03-03 14:35:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2025-03-03 14:35:10,637 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:10,637 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 25, 25, 22, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:10,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:10,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:10,838 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:10,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1886851875, now seen corresponding path program 4 times [2025-03-03 14:35:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374037388] [2025-03-03 14:35:10,838 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:10,846 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 376 statements into 2 equivalence classes. [2025-03-03 14:35:10,859 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 319 of 376 statements. [2025-03-03 14:35:10,860 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:10,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4045 backedges. 151 proven. 740 refuted. 0 times theorem prover too weak. 3154 trivial. 0 not checked. [2025-03-03 14:35:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374037388] [2025-03-03 14:35:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374037388] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799401545] [2025-03-03 14:35:11,086 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:11,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:11,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:11,089 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:11,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:35:11,163 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 376 statements into 2 equivalence classes. [2025-03-03 14:35:11,210 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 319 of 376 statements. [2025-03-03 14:35:11,210 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:11,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:11,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:11,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4045 backedges. 151 proven. 740 refuted. 0 times theorem prover too weak. 3154 trivial. 0 not checked. [2025-03-03 14:35:11,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4045 backedges. 151 proven. 761 refuted. 0 times theorem prover too weak. 3133 trivial. 0 not checked. [2025-03-03 14:35:12,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799401545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:12,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:12,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 19 [2025-03-03 14:35:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12270569] [2025-03-03 14:35:12,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:12,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:35:12,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:12,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:35:12,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:35:12,749 INFO L87 Difference]: Start difference. First operand 129 states and 216 transitions. Second operand has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) [2025-03-03 14:35:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:12,923 INFO L93 Difference]: Finished difference Result 170 states and 334 transitions. [2025-03-03 14:35:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:35:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) Word has length 376 [2025-03-03 14:35:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:12,926 INFO L225 Difference]: With dead ends: 170 [2025-03-03 14:35:12,926 INFO L226 Difference]: Without dead ends: 166 [2025-03-03 14:35:12,926 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 742 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:35:12,927 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:12,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 218 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-03-03 14:35:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 141. [2025-03-03 14:35:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.118279569892473) internal successors, (104), 92 states have internal predecessors, (104), 25 states have call successors, (25), 11 states have call predecessors, (25), 22 states have return successors, (121), 37 states have call predecessors, (121), 25 states have call successors, (121) [2025-03-03 14:35:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 250 transitions. [2025-03-03 14:35:12,947 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 250 transitions. Word has length 376 [2025-03-03 14:35:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:12,948 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 250 transitions. [2025-03-03 14:35:12,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 19 states have internal predecessors, (68), 15 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 10 states have call predecessors, (24), 15 states have call successors, (24) [2025-03-03 14:35:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 250 transitions. [2025-03-03 14:35:12,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2025-03-03 14:35:12,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:12,951 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 29, 29, 28, 25, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 14, 14, 14, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:12,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:13,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 14:35:13,155 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:13,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash 72912325, now seen corresponding path program 5 times [2025-03-03 14:35:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493200774] [2025-03-03 14:35:13,156 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:13,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:13,167 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 459 statements into 27 equivalence classes. [2025-03-03 14:35:13,176 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 122 of 459 statements. [2025-03-03 14:35:13,177 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 14:35:13,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 206 proven. 726 refuted. 0 times theorem prover too weak. 5230 trivial. 0 not checked. [2025-03-03 14:35:13,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:13,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493200774] [2025-03-03 14:35:13,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493200774] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:13,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858957183] [2025-03-03 14:35:13,240 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:13,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:13,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:13,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:35:13,332 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 459 statements into 27 equivalence classes. [2025-03-03 14:35:13,353 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 122 of 459 statements. [2025-03-03 14:35:13,353 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-03 14:35:13,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:13,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:35:13,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 1470 proven. 7 refuted. 0 times theorem prover too weak. 4685 trivial. 0 not checked. [2025-03-03 14:35:13,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 206 proven. 726 refuted. 0 times theorem prover too weak. 5230 trivial. 0 not checked. [2025-03-03 14:35:14,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858957183] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:14,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:14,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2025-03-03 14:35:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455542875] [2025-03-03 14:35:14,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:14,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:35:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:14,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:35:14,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:35:14,235 INFO L87 Difference]: Start difference. First operand 141 states and 250 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 5 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2025-03-03 14:35:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:14,366 INFO L93 Difference]: Finished difference Result 278 states and 548 transitions. [2025-03-03 14:35:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:35:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 5 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 459 [2025-03-03 14:35:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:14,368 INFO L225 Difference]: With dead ends: 278 [2025-03-03 14:35:14,368 INFO L226 Difference]: Without dead ends: 143 [2025-03-03 14:35:14,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 911 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:35:14,370 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:14,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 205 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-03-03 14:35:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2025-03-03 14:35:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 92 states have internal predecessors, (105), 24 states have call successors, (24), 12 states have call predecessors, (24), 22 states have return successors, (114), 36 states have call predecessors, (114), 24 states have call successors, (114) [2025-03-03 14:35:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 243 transitions. [2025-03-03 14:35:14,388 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 243 transitions. Word has length 459 [2025-03-03 14:35:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:14,388 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 243 transitions. [2025-03-03 14:35:14,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 5 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2025-03-03 14:35:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 243 transitions. [2025-03-03 14:35:14,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2025-03-03 14:35:14,391 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:14,391 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 25, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:14,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-03 14:35:14,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 14:35:14,591 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:14,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1031977942, now seen corresponding path program 6 times [2025-03-03 14:35:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:14,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131288494] [2025-03-03 14:35:14,592 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:14,601 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 418 statements into 23 equivalence classes. [2025-03-03 14:35:14,629 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 221 of 418 statements. [2025-03-03 14:35:14,630 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 14:35:14,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4993 backedges. 635 proven. 97 refuted. 0 times theorem prover too weak. 4261 trivial. 0 not checked. [2025-03-03 14:35:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131288494] [2025-03-03 14:35:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131288494] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561777486] [2025-03-03 14:35:14,769 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:14,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:14,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:14,773 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:14,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:35:14,863 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 418 statements into 23 equivalence classes. [2025-03-03 14:35:14,907 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) and asserted 221 of 418 statements. [2025-03-03 14:35:14,907 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2025-03-03 14:35:14,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:14,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:35:14,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4993 backedges. 650 proven. 100 refuted. 0 times theorem prover too weak. 4243 trivial. 0 not checked. [2025-03-03 14:35:14,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4993 backedges. 654 proven. 106 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2025-03-03 14:35:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561777486] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:15,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:15,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 17 [2025-03-03 14:35:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511148239] [2025-03-03 14:35:15,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:15,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:35:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:15,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:35:15,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:35:15,867 INFO L87 Difference]: Start difference. First operand 141 states and 243 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-03-03 14:35:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:16,003 INFO L93 Difference]: Finished difference Result 181 states and 349 transitions. [2025-03-03 14:35:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:35:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 418 [2025-03-03 14:35:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:16,006 INFO L225 Difference]: With dead ends: 181 [2025-03-03 14:35:16,006 INFO L226 Difference]: Without dead ends: 177 [2025-03-03 14:35:16,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 826 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2025-03-03 14:35:16,007 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:16,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 157 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-03-03 14:35:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2025-03-03 14:35:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 106 states have internal predecessors, (123), 30 states have call successors, (30), 14 states have call predecessors, (30), 24 states have return successors, (156), 42 states have call predecessors, (156), 30 states have call successors, (156) [2025-03-03 14:35:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 309 transitions. [2025-03-03 14:35:16,018 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 309 transitions. Word has length 418 [2025-03-03 14:35:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:16,019 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 309 transitions. [2025-03-03 14:35:16,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2025-03-03 14:35:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 309 transitions. [2025-03-03 14:35:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2025-03-03 14:35:16,022 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:16,022 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 28, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:16,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:16,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 14:35:16,226 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:16,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2116941062, now seen corresponding path program 7 times [2025-03-03 14:35:16,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:16,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095686585] [2025-03-03 14:35:16,226 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:16,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 459 statements into 1 equivalence classes. [2025-03-03 14:35:16,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 459 of 459 statements. [2025-03-03 14:35:16,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:16,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 240 proven. 754 refuted. 0 times theorem prover too weak. 5064 trivial. 0 not checked. [2025-03-03 14:35:16,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095686585] [2025-03-03 14:35:16,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095686585] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042801403] [2025-03-03 14:35:16,491 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:16,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:16,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:16,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:35:16,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 459 statements into 1 equivalence classes. [2025-03-03 14:35:16,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 459 of 459 statements. [2025-03-03 14:35:16,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:16,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:16,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:16,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 240 proven. 754 refuted. 0 times theorem prover too weak. 5064 trivial. 0 not checked. [2025-03-03 14:35:16,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 240 proven. 770 refuted. 0 times theorem prover too weak. 5048 trivial. 0 not checked. [2025-03-03 14:35:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042801403] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:17,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 17 [2025-03-03 14:35:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423227221] [2025-03-03 14:35:17,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:17,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:35:17,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:17,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:35:17,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:35:17,953 INFO L87 Difference]: Start difference. First operand 163 states and 309 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2025-03-03 14:35:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:18,066 INFO L93 Difference]: Finished difference Result 220 states and 541 transitions. [2025-03-03 14:35:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:35:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 459 [2025-03-03 14:35:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:18,070 INFO L225 Difference]: With dead ends: 220 [2025-03-03 14:35:18,070 INFO L226 Difference]: Without dead ends: 216 [2025-03-03 14:35:18,071 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 909 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:35:18,072 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:18,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 156 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2025-03-03 14:35:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 171. [2025-03-03 14:35:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 111 states have internal predecessors, (128), 31 states have call successors, (31), 14 states have call predecessors, (31), 26 states have return successors, (177), 45 states have call predecessors, (177), 31 states have call successors, (177) [2025-03-03 14:35:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2025-03-03 14:35:18,088 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 459 [2025-03-03 14:35:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:18,089 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2025-03-03 14:35:18,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2025-03-03 14:35:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2025-03-03 14:35:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2025-03-03 14:35:18,091 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:18,091 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 30, 30, 27, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 12, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:18,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:18,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 14:35:18,292 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:18,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1608768841, now seen corresponding path program 8 times [2025-03-03 14:35:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:18,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395857616] [2025-03-03 14:35:18,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:18,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 433 statements into 2 equivalence classes. [2025-03-03 14:35:18,324 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 433 of 433 statements. [2025-03-03 14:35:18,325 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:18,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5379 backedges. 276 proven. 652 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2025-03-03 14:35:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395857616] [2025-03-03 14:35:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395857616] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742728736] [2025-03-03 14:35:18,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:18,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:18,542 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:18,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:35:18,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 433 statements into 2 equivalence classes. [2025-03-03 14:35:18,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 433 of 433 statements. [2025-03-03 14:35:18,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:18,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:18,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:18,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5379 backedges. 276 proven. 652 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2025-03-03 14:35:18,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5379 backedges. 278 proven. 666 refuted. 0 times theorem prover too weak. 4435 trivial. 0 not checked. [2025-03-03 14:35:19,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742728736] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:19,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:19,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 17 [2025-03-03 14:35:19,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413275198] [2025-03-03 14:35:19,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:19,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:35:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:19,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:35:19,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:35:19,919 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2025-03-03 14:35:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:20,052 INFO L93 Difference]: Finished difference Result 218 states and 531 transitions. [2025-03-03 14:35:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:35:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 433 [2025-03-03 14:35:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:20,055 INFO L225 Difference]: With dead ends: 218 [2025-03-03 14:35:20,055 INFO L226 Difference]: Without dead ends: 214 [2025-03-03 14:35:20,056 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 857 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:35:20,057 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:20,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 168 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-03-03 14:35:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 171. [2025-03-03 14:35:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 111 states have internal predecessors, (128), 31 states have call successors, (31), 14 states have call predecessors, (31), 26 states have return successors, (177), 45 states have call predecessors, (177), 31 states have call successors, (177) [2025-03-03 14:35:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2025-03-03 14:35:20,073 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 433 [2025-03-03 14:35:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:20,074 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2025-03-03 14:35:20,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 13 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2025-03-03 14:35:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2025-03-03 14:35:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2025-03-03 14:35:20,076 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:20,077 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 28, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:20,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 14:35:20,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:20,281 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:20,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash -203009317, now seen corresponding path program 9 times [2025-03-03 14:35:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:20,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926174050] [2025-03-03 14:35:20,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:20,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:20,297 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 486 statements into 32 equivalence classes. [2025-03-03 14:35:20,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 56 of 486 statements. [2025-03-03 14:35:20,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 14:35:20,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6812 backedges. 646 proven. 2 refuted. 0 times theorem prover too weak. 6164 trivial. 0 not checked. [2025-03-03 14:35:20,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:20,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926174050] [2025-03-03 14:35:20,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926174050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:20,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744689114] [2025-03-03 14:35:20,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:20,353 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:35:20,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 486 statements into 32 equivalence classes. [2025-03-03 14:35:20,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 56 of 486 statements. [2025-03-03 14:35:20,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-03 14:35:20,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:20,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:35:20,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6812 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 6036 trivial. 0 not checked. [2025-03-03 14:35:20,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6812 backedges. 770 proven. 6 refuted. 0 times theorem prover too weak. 6036 trivial. 0 not checked. [2025-03-03 14:35:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744689114] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:21,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2025-03-03 14:35:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704427316] [2025-03-03 14:35:21,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:21,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-03 14:35:21,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:21,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-03 14:35:21,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-03 14:35:21,404 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 14:35:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:21,493 INFO L93 Difference]: Finished difference Result 295 states and 634 transitions. [2025-03-03 14:35:21,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 14:35:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 486 [2025-03-03 14:35:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:21,495 INFO L225 Difference]: With dead ends: 295 [2025-03-03 14:35:21,495 INFO L226 Difference]: Without dead ends: 132 [2025-03-03 14:35:21,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 961 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:35:21,497 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:21,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-03 14:35:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2025-03-03 14:35:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 87 states have internal predecessors, (100), 23 states have call successors, (23), 13 states have call predecessors, (23), 19 states have return successors, (96), 31 states have call predecessors, (96), 23 states have call successors, (96) [2025-03-03 14:35:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 219 transitions. [2025-03-03 14:35:21,505 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 219 transitions. Word has length 486 [2025-03-03 14:35:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:21,506 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 219 transitions. [2025-03-03 14:35:21,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2025-03-03 14:35:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 219 transitions. [2025-03-03 14:35:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2025-03-03 14:35:21,509 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:21,510 INFO L218 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 45, 40, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 18, 14, 14, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:21,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:21,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 14:35:21,714 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:21,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1747328721, now seen corresponding path program 10 times [2025-03-03 14:35:21,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:21,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719053234] [2025-03-03 14:35:21,715 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:21,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:21,726 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 731 statements into 2 equivalence classes. [2025-03-03 14:35:21,754 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 622 of 731 statements. [2025-03-03 14:35:21,754 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:21,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15710 backedges. 398 proven. 1348 refuted. 0 times theorem prover too weak. 13964 trivial. 0 not checked. [2025-03-03 14:35:22,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:22,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719053234] [2025-03-03 14:35:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719053234] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:22,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478807888] [2025-03-03 14:35:22,117 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:22,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:22,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:22,119 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:22,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:35:22,239 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 731 statements into 2 equivalence classes. [2025-03-03 14:35:22,323 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 622 of 731 statements. [2025-03-03 14:35:22,323 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:22,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:22,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:35:22,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15710 backedges. 364 proven. 1830 refuted. 0 times theorem prover too weak. 13516 trivial. 0 not checked. [2025-03-03 14:35:22,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15710 backedges. 368 proven. 1856 refuted. 0 times theorem prover too weak. 13486 trivial. 0 not checked. [2025-03-03 14:35:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478807888] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:24,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 26 [2025-03-03 14:35:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577224347] [2025-03-03 14:35:24,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:24,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 14:35:24,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:24,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 14:35:24,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:35:24,897 INFO L87 Difference]: Start difference. First operand 132 states and 219 transitions. Second operand has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 18 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 15 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 14:35:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:25,162 INFO L93 Difference]: Finished difference Result 198 states and 456 transitions. [2025-03-03 14:35:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:35:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 18 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 15 states have call predecessors, (32), 18 states have call successors, (32) Word has length 731 [2025-03-03 14:35:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:25,165 INFO L225 Difference]: With dead ends: 198 [2025-03-03 14:35:25,165 INFO L226 Difference]: Without dead ends: 123 [2025-03-03 14:35:25,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1444 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:35:25,167 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:25,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 523 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-03-03 14:35:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2025-03-03 14:35:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 80 states have internal predecessors, (93), 20 states have call successors, (20), 13 states have call predecessors, (20), 17 states have return successors, (52), 26 states have call predecessors, (52), 20 states have call successors, (52) [2025-03-03 14:35:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2025-03-03 14:35:25,174 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 731 [2025-03-03 14:35:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:25,174 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2025-03-03 14:35:25,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 18 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 15 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 14:35:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2025-03-03 14:35:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2025-03-03 14:35:25,178 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:25,178 INFO L218 NwaCegarLoop]: trace histogram [49, 49, 46, 46, 39, 38, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 16, 14, 10, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:25,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:25,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:35:25,378 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:25,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:25,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1827518729, now seen corresponding path program 11 times [2025-03-03 14:35:25,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:25,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292265820] [2025-03-03 14:35:25,379 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:25,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:25,391 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 651 statements into 40 equivalence classes. [2025-03-03 14:35:25,408 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 271 of 651 statements. [2025-03-03 14:35:25,409 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-03 14:35:25,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12404 backedges. 767 proven. 1021 refuted. 0 times theorem prover too weak. 10616 trivial. 0 not checked. [2025-03-03 14:35:25,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292265820] [2025-03-03 14:35:25,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292265820] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601098628] [2025-03-03 14:35:25,541 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:25,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:25,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 14:35:25,689 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 651 statements into 40 equivalence classes. [2025-03-03 14:35:25,738 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) and asserted 271 of 651 statements. [2025-03-03 14:35:25,738 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2025-03-03 14:35:25,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:25,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:25,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12404 backedges. 6871 proven. 135 refuted. 0 times theorem prover too weak. 5398 trivial. 0 not checked. [2025-03-03 14:35:25,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12404 backedges. 769 proven. 1023 refuted. 0 times theorem prover too weak. 10612 trivial. 0 not checked. [2025-03-03 14:35:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601098628] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:27,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:27,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 19 [2025-03-03 14:35:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761488319] [2025-03-03 14:35:27,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:27,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:35:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:27,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:35:27,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:35:27,242 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 12 states have call successors, (24), 2 states have call predecessors, (24), 8 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2025-03-03 14:35:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:27,470 INFO L93 Difference]: Finished difference Result 246 states and 374 transitions. [2025-03-03 14:35:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:35:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 12 states have call successors, (24), 2 states have call predecessors, (24), 8 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 651 [2025-03-03 14:35:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:27,472 INFO L225 Difference]: With dead ends: 246 [2025-03-03 14:35:27,472 INFO L226 Difference]: Without dead ends: 136 [2025-03-03 14:35:27,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1326 GetRequests, 1291 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2025-03-03 14:35:27,473 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:27,473 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 323 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2025-03-03 14:35:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2025-03-03 14:35:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 23 states have call successors, (23), 13 states have call predecessors, (23), 18 states have return successors, (54), 29 states have call predecessors, (54), 23 states have call successors, (54) [2025-03-03 14:35:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 172 transitions. [2025-03-03 14:35:27,482 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 172 transitions. Word has length 651 [2025-03-03 14:35:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:27,483 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 172 transitions. [2025-03-03 14:35:27,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 12 states have call successors, (24), 2 states have call predecessors, (24), 8 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2025-03-03 14:35:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 172 transitions. [2025-03-03 14:35:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2025-03-03 14:35:27,486 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:27,487 INFO L218 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 47, 44, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 18, 16, 14, 10, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:27,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 14:35:27,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:27,691 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:27,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 146818441, now seen corresponding path program 12 times [2025-03-03 14:35:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:27,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341021541] [2025-03-03 14:35:27,691 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:27,703 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 785 statements into 46 equivalence classes. [2025-03-03 14:35:27,718 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 182 of 785 statements. [2025-03-03 14:35:27,718 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 14:35:27,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18159 backedges. 1730 proven. 26 refuted. 0 times theorem prover too weak. 16403 trivial. 0 not checked. [2025-03-03 14:35:27,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:27,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341021541] [2025-03-03 14:35:27,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341021541] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164172555] [2025-03-03 14:35:27,896 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:27,897 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:27,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 14:35:28,058 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 785 statements into 46 equivalence classes. [2025-03-03 14:35:28,089 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) and asserted 182 of 785 statements. [2025-03-03 14:35:28,089 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2025-03-03 14:35:28,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:28,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:35:28,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18159 backedges. 1923 proven. 33 refuted. 0 times theorem prover too weak. 16203 trivial. 0 not checked. [2025-03-03 14:35:28,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18159 backedges. 1923 proven. 35 refuted. 0 times theorem prover too weak. 16201 trivial. 0 not checked. [2025-03-03 14:35:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164172555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:29,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 13] total 24 [2025-03-03 14:35:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173433001] [2025-03-03 14:35:29,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:29,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:35:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:29,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:35:29,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:35:29,782 INFO L87 Difference]: Start difference. First operand 129 states and 172 transitions. Second operand has 24 states, 23 states have (on average 3.217391304347826) internal successors, (74), 24 states have internal predecessors, (74), 13 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:35:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:30,002 INFO L93 Difference]: Finished difference Result 248 states and 341 transitions. [2025-03-03 14:35:30,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-03 14:35:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.217391304347826) internal successors, (74), 24 states have internal predecessors, (74), 13 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) Word has length 785 [2025-03-03 14:35:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:30,004 INFO L225 Difference]: With dead ends: 248 [2025-03-03 14:35:30,004 INFO L226 Difference]: Without dead ends: 129 [2025-03-03 14:35:30,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1595 GetRequests, 1556 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:35:30,006 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:30,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 247 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-03-03 14:35:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2025-03-03 14:35:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 17 states have return successors, (46), 27 states have call predecessors, (46), 22 states have call successors, (46) [2025-03-03 14:35:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2025-03-03 14:35:30,019 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 785 [2025-03-03 14:35:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:30,019 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2025-03-03 14:35:30,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.217391304347826) internal successors, (74), 24 states have internal predecessors, (74), 13 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:35:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2025-03-03 14:35:30,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2025-03-03 14:35:30,028 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:30,028 INFO L218 NwaCegarLoop]: trace histogram [69, 69, 58, 58, 53, 50, 34, 34, 34, 34, 34, 34, 34, 29, 29, 29, 29, 29, 29, 29, 24, 16, 16, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:30,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 14:35:30,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:30,229 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:30,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -225605655, now seen corresponding path program 13 times [2025-03-03 14:35:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452178637] [2025-03-03 14:35:30,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:30,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 869 statements into 1 equivalence classes. [2025-03-03 14:35:30,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 869 of 869 statements. [2025-03-03 14:35:30,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:30,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22467 backedges. 491 proven. 1607 refuted. 0 times theorem prover too weak. 20369 trivial. 0 not checked. [2025-03-03 14:35:30,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:30,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452178637] [2025-03-03 14:35:30,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452178637] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594855979] [2025-03-03 14:35:30,808 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:30,810 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:30,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 14:35:30,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 869 statements into 1 equivalence classes. [2025-03-03 14:35:31,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 869 of 869 statements. [2025-03-03 14:35:31,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:31,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:31,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:35:31,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22467 backedges. 553 proven. 2081 refuted. 0 times theorem prover too weak. 19833 trivial. 0 not checked. [2025-03-03 14:35:31,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22467 backedges. 555 proven. 2109 refuted. 0 times theorem prover too weak. 19803 trivial. 0 not checked. [2025-03-03 14:35:33,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594855979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:33,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:33,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 25 [2025-03-03 14:35:33,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908297376] [2025-03-03 14:35:33,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:33,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:35:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:33,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:35:33,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:35:33,810 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 25 states, 24 states have (on average 3.375) internal successors, (81), 25 states have internal predecessors, (81), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:35:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:33,993 INFO L93 Difference]: Finished difference Result 144 states and 191 transitions. [2025-03-03 14:35:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:35:33,994 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.375) internal successors, (81), 25 states have internal predecessors, (81), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) Word has length 869 [2025-03-03 14:35:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:33,995 INFO L225 Difference]: With dead ends: 144 [2025-03-03 14:35:33,995 INFO L226 Difference]: Without dead ends: 124 [2025-03-03 14:35:33,996 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1761 GetRequests, 1721 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 14:35:33,996 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:33,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 375 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-03 14:35:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2025-03-03 14:35:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 17 states have return successors, (44), 27 states have call predecessors, (44), 22 states have call successors, (44) [2025-03-03 14:35:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2025-03-03 14:35:34,003 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 869 [2025-03-03 14:35:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:34,003 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2025-03-03 14:35:34,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.375) internal successors, (81), 25 states have internal predecessors, (81), 18 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 13 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:35:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2025-03-03 14:35:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-03 14:35:34,022 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:34,022 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 34, 34, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:34,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:34,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:34,222 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:34,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1424997051, now seen corresponding path program 14 times [2025-03-03 14:35:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:34,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763259767] [2025-03-03 14:35:34,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:34,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:34,236 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 487 statements into 2 equivalence classes. [2025-03-03 14:35:34,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 487 of 487 statements. [2025-03-03 14:35:34,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:34,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 355 proven. 533 refuted. 0 times theorem prover too weak. 5960 trivial. 0 not checked. [2025-03-03 14:35:34,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:34,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763259767] [2025-03-03 14:35:34,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763259767] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:34,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917173513] [2025-03-03 14:35:34,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:34,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:34,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:34,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:34,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 14:35:34,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 487 statements into 2 equivalence classes. [2025-03-03 14:35:34,711 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 487 of 487 statements. [2025-03-03 14:35:34,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:34,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:34,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:34,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 411 proven. 647 refuted. 0 times theorem prover too weak. 5790 trivial. 0 not checked. [2025-03-03 14:35:34,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6848 backedges. 413 proven. 661 refuted. 0 times theorem prover too weak. 5774 trivial. 0 not checked. [2025-03-03 14:35:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917173513] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:36,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:36,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 18 [2025-03-03 14:35:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038388996] [2025-03-03 14:35:36,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:36,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:35:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:36,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:35:36,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:35:36,014 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 13 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (22), 9 states have call predecessors, (22), 13 states have call successors, (22) [2025-03-03 14:35:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:36,108 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2025-03-03 14:35:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:35:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 13 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (22), 9 states have call predecessors, (22), 13 states have call successors, (22) Word has length 487 [2025-03-03 14:35:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:36,112 INFO L225 Difference]: With dead ends: 151 [2025-03-03 14:35:36,112 INFO L226 Difference]: Without dead ends: 142 [2025-03-03 14:35:36,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:35:36,114 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:36,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 147 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2025-03-03 14:35:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2025-03-03 14:35:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 23 states have call successors, (23), 13 states have call predecessors, (23), 19 states have return successors, (53), 30 states have call predecessors, (53), 23 states have call successors, (53) [2025-03-03 14:35:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 173 transitions. [2025-03-03 14:35:36,122 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 173 transitions. Word has length 487 [2025-03-03 14:35:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:36,122 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 173 transitions. [2025-03-03 14:35:36,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 18 states have internal predecessors, (65), 13 states have call successors, (18), 1 states have call predecessors, (18), 8 states have return successors, (22), 9 states have call predecessors, (22), 13 states have call successors, (22) [2025-03-03 14:35:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 173 transitions. [2025-03-03 14:35:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2025-03-03 14:35:36,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:36,124 INFO L218 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 32, 31, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 13, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:36,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 14:35:36,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-03 14:35:36,325 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:36,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1127286573, now seen corresponding path program 15 times [2025-03-03 14:35:36,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:36,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044857404] [2025-03-03 14:35:36,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:36,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 541 statements into 36 equivalence classes. [2025-03-03 14:35:36,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 265 of 541 statements. [2025-03-03 14:35:36,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-03 14:35:36,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1254 proven. 125 refuted. 0 times theorem prover too weak. 7110 trivial. 0 not checked. [2025-03-03 14:35:36,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:36,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044857404] [2025-03-03 14:35:36,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044857404] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:36,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073483274] [2025-03-03 14:35:36,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:36,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:36,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 14:35:36,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 541 statements into 36 equivalence classes. [2025-03-03 14:35:36,758 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 265 of 541 statements. [2025-03-03 14:35:36,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-03 14:35:36,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:36,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:36,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1392 proven. 145 refuted. 0 times theorem prover too weak. 6952 trivial. 0 not checked. [2025-03-03 14:35:36,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1392 proven. 152 refuted. 0 times theorem prover too weak. 6945 trivial. 0 not checked. [2025-03-03 14:35:38,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073483274] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:38,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:38,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 26 [2025-03-03 14:35:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137508963] [2025-03-03 14:35:38,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:38,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 14:35:38,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:38,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 14:35:38,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:35:38,198 INFO L87 Difference]: Start difference. First operand 132 states and 173 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 14 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (30), 16 states have call predecessors, (30), 14 states have call successors, (30) [2025-03-03 14:35:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:38,441 INFO L93 Difference]: Finished difference Result 269 states and 365 transitions. [2025-03-03 14:35:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-03 14:35:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 14 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (30), 16 states have call predecessors, (30), 14 states have call successors, (30) Word has length 541 [2025-03-03 14:35:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:38,443 INFO L225 Difference]: With dead ends: 269 [2025-03-03 14:35:38,443 INFO L226 Difference]: Without dead ends: 147 [2025-03-03 14:35:38,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 1065 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 14:35:38,444 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:38,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 273 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-03 14:35:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2025-03-03 14:35:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 93 states have internal predecessors, (103), 24 states have call successors, (24), 14 states have call predecessors, (24), 20 states have return successors, (60), 32 states have call predecessors, (60), 24 states have call successors, (60) [2025-03-03 14:35:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2025-03-03 14:35:38,453 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 541 [2025-03-03 14:35:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:38,454 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2025-03-03 14:35:38,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 14 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (30), 16 states have call predecessors, (30), 14 states have call successors, (30) [2025-03-03 14:35:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2025-03-03 14:35:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2025-03-03 14:35:38,456 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:38,457 INFO L218 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 40, 39, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 16, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:38,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:38,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-03 14:35:38,657 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:38,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:38,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1796251529, now seen corresponding path program 16 times [2025-03-03 14:35:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:38,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639676383] [2025-03-03 14:35:38,658 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:38,669 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 677 statements into 2 equivalence classes. [2025-03-03 14:35:38,707 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 576 of 677 statements. [2025-03-03 14:35:38,708 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:38,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13429 backedges. 575 proven. 1033 refuted. 0 times theorem prover too weak. 11821 trivial. 0 not checked. [2025-03-03 14:35:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:38,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639676383] [2025-03-03 14:35:38,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639676383] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:38,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115752720] [2025-03-03 14:35:38,980 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:38,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:38,982 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:38,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 14:35:39,167 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 677 statements into 2 equivalence classes. [2025-03-03 14:35:39,241 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 576 of 677 statements. [2025-03-03 14:35:39,242 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:39,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:39,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:35:39,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13429 backedges. 685 proven. 1333 refuted. 0 times theorem prover too weak. 11411 trivial. 0 not checked. [2025-03-03 14:35:39,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13429 backedges. 685 proven. 1363 refuted. 0 times theorem prover too weak. 11381 trivial. 0 not checked. [2025-03-03 14:35:41,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115752720] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:41,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:41,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 25 [2025-03-03 14:35:41,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668219514] [2025-03-03 14:35:41,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:41,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:35:41,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:41,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:35:41,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:35:41,574 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:35:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:41,744 INFO L93 Difference]: Finished difference Result 158 states and 212 transitions. [2025-03-03 14:35:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-03 14:35:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) Word has length 677 [2025-03-03 14:35:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:41,745 INFO L225 Difference]: With dead ends: 158 [2025-03-03 14:35:41,745 INFO L226 Difference]: Without dead ends: 143 [2025-03-03 14:35:41,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1337 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2025-03-03 14:35:41,746 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:41,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 406 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-03-03 14:35:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2025-03-03 14:35:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 95 states have internal predecessors, (105), 24 states have call successors, (24), 14 states have call predecessors, (24), 21 states have return successors, (58), 33 states have call predecessors, (58), 24 states have call successors, (58) [2025-03-03 14:35:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2025-03-03 14:35:41,755 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 677 [2025-03-03 14:35:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:41,755 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2025-03-03 14:35:41,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 25 states have internal predecessors, (82), 18 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (31), 14 states have call predecessors, (31), 18 states have call successors, (31) [2025-03-03 14:35:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2025-03-03 14:35:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2025-03-03 14:35:41,758 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:41,758 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 34, 33, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 14, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:41,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:41,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:41,962 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:41,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1368584279, now seen corresponding path program 17 times [2025-03-03 14:35:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404263110] [2025-03-03 14:35:41,962 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:41,972 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 569 statements into 36 equivalence classes. [2025-03-03 14:35:41,997 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) and asserted 498 of 569 statements. [2025-03-03 14:35:41,997 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2025-03-03 14:35:41,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1202 proven. 1130 refuted. 0 times theorem prover too weak. 7081 trivial. 0 not checked. [2025-03-03 14:35:42,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:42,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404263110] [2025-03-03 14:35:42,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404263110] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:42,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735785334] [2025-03-03 14:35:42,437 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:35:42,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:42,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:42,439 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:42,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 14:35:42,626 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 569 statements into 36 equivalence classes. [2025-03-03 14:35:42,711 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) and asserted 498 of 569 statements. [2025-03-03 14:35:42,711 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2025-03-03 14:35:42,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:42,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:35:42,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1177 proven. 1149 refuted. 0 times theorem prover too weak. 7087 trivial. 0 not checked. [2025-03-03 14:35:42,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9413 backedges. 1183 proven. 1167 refuted. 0 times theorem prover too weak. 7063 trivial. 0 not checked. [2025-03-03 14:35:44,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735785334] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:44,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 25] total 31 [2025-03-03 14:35:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110151502] [2025-03-03 14:35:44,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:44,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 14:35:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:44,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 14:35:44,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:35:44,902 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 23 states have call successors, (34), 1 states have call predecessors, (34), 13 states have return successors, (41), 20 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-03 14:35:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:45,410 INFO L93 Difference]: Finished difference Result 322 states and 450 transitions. [2025-03-03 14:35:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-03 14:35:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 23 states have call successors, (34), 1 states have call predecessors, (34), 13 states have return successors, (41), 20 states have call predecessors, (41), 23 states have call successors, (41) Word has length 569 [2025-03-03 14:35:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:45,412 INFO L225 Difference]: With dead ends: 322 [2025-03-03 14:35:45,412 INFO L226 Difference]: Without dead ends: 171 [2025-03-03 14:35:45,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1121 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 14:35:45,414 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 99 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:45,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 568 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:35:45,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-03-03 14:35:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2025-03-03 14:35:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 104 states have internal predecessors, (116), 27 states have call successors, (27), 18 states have call predecessors, (27), 20 states have return successors, (59), 31 states have call predecessors, (59), 27 states have call successors, (59) [2025-03-03 14:35:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 202 transitions. [2025-03-03 14:35:45,424 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 202 transitions. Word has length 569 [2025-03-03 14:35:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:45,424 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 202 transitions. [2025-03-03 14:35:45,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 23 states have call successors, (34), 1 states have call predecessors, (34), 13 states have return successors, (41), 20 states have call predecessors, (41), 23 states have call successors, (41) [2025-03-03 14:35:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 202 transitions. [2025-03-03 14:35:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2025-03-03 14:35:45,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:45,426 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 33, 33, 31, 28, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 16, 16, 16, 15, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:45,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 14:35:45,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:45,627 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:45,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -336042422, now seen corresponding path program 18 times [2025-03-03 14:35:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:45,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792408110] [2025-03-03 14:35:45,629 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:45,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:45,639 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 513 statements into 32 equivalence classes. [2025-03-03 14:35:45,646 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 151 of 513 statements. [2025-03-03 14:35:45,649 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 14:35:45,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7719 backedges. 888 proven. 63 refuted. 0 times theorem prover too weak. 6768 trivial. 0 not checked. [2025-03-03 14:35:45,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792408110] [2025-03-03 14:35:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792408110] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673449951] [2025-03-03 14:35:45,745 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:35:45,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:45,747 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:45,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 14:35:45,947 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 513 statements into 32 equivalence classes. [2025-03-03 14:35:45,971 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 151 of 513 statements. [2025-03-03 14:35:45,971 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-03 14:35:45,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:45,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:35:45,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7719 backedges. 1941 proven. 21 refuted. 0 times theorem prover too weak. 5757 trivial. 0 not checked. [2025-03-03 14:35:46,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7719 backedges. 1018 proven. 78 refuted. 0 times theorem prover too weak. 6623 trivial. 0 not checked. [2025-03-03 14:35:46,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673449951] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:46,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:46,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 19 [2025-03-03 14:35:46,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389249319] [2025-03-03 14:35:46,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:46,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:35:46,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:46,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:35:46,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:35:46,954 INFO L87 Difference]: Start difference. First operand 154 states and 202 transitions. Second operand has 19 states, 18 states have (on average 4.0) internal successors, (72), 19 states have internal predecessors, (72), 11 states have call successors, (19), 2 states have call predecessors, (19), 6 states have return successors, (23), 6 states have call predecessors, (23), 11 states have call successors, (23) [2025-03-03 14:35:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:47,127 INFO L93 Difference]: Finished difference Result 298 states and 421 transitions. [2025-03-03 14:35:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:35:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.0) internal successors, (72), 19 states have internal predecessors, (72), 11 states have call successors, (19), 2 states have call predecessors, (19), 6 states have return successors, (23), 6 states have call predecessors, (23), 11 states have call successors, (23) Word has length 513 [2025-03-03 14:35:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:47,129 INFO L225 Difference]: With dead ends: 298 [2025-03-03 14:35:47,129 INFO L226 Difference]: Without dead ends: 150 [2025-03-03 14:35:47,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 1014 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2025-03-03 14:35:47,130 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:47,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 154 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-03-03 14:35:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2025-03-03 14:35:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 100 states have internal predecessors, (115), 26 states have call successors, (26), 20 states have call predecessors, (26), 17 states have return successors, (44), 27 states have call predecessors, (44), 26 states have call successors, (44) [2025-03-03 14:35:47,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 185 transitions. [2025-03-03 14:35:47,139 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 185 transitions. Word has length 513 [2025-03-03 14:35:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:47,139 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 185 transitions. [2025-03-03 14:35:47,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.0) internal successors, (72), 19 states have internal predecessors, (72), 11 states have call successors, (19), 2 states have call predecessors, (19), 6 states have return successors, (23), 6 states have call predecessors, (23), 11 states have call successors, (23) [2025-03-03 14:35:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 185 transitions. [2025-03-03 14:35:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2025-03-03 14:35:47,141 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:47,141 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:47,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-03 14:35:47,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 14:35:47,342 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:47,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1237781432, now seen corresponding path program 19 times [2025-03-03 14:35:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:47,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143370394] [2025-03-03 14:35:47,343 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:47,352 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 460 statements into 1 equivalence classes. [2025-03-03 14:35:47,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 460 of 460 statements. [2025-03-03 14:35:47,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:47,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 573 proven. 257 refuted. 0 times theorem prover too weak. 5252 trivial. 0 not checked. [2025-03-03 14:35:47,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143370394] [2025-03-03 14:35:47,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143370394] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:47,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581898314] [2025-03-03 14:35:47,534 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:35:47,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:47,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:47,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 14:35:47,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 460 statements into 1 equivalence classes. [2025-03-03 14:35:47,796 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 460 of 460 statements. [2025-03-03 14:35:47,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:35:47,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:47,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:35:47,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 681 proven. 316 refuted. 0 times theorem prover too weak. 5085 trivial. 0 not checked. [2025-03-03 14:35:47,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 685 proven. 328 refuted. 0 times theorem prover too weak. 5069 trivial. 0 not checked. [2025-03-03 14:35:49,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581898314] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:49,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:49,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 18 [2025-03-03 14:35:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111228768] [2025-03-03 14:35:49,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:49,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:35:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:49,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:35:49,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:35:49,011 INFO L87 Difference]: Start difference. First operand 148 states and 185 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:35:49,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:49,120 INFO L93 Difference]: Finished difference Result 170 states and 213 transitions. [2025-03-03 14:35:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:35:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) Word has length 460 [2025-03-03 14:35:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:49,122 INFO L225 Difference]: With dead ends: 170 [2025-03-03 14:35:49,122 INFO L226 Difference]: Without dead ends: 158 [2025-03-03 14:35:49,122 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 908 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:35:49,123 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:49,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 170 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2025-03-03 14:35:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2025-03-03 14:35:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 100 states have internal predecessors, (115), 26 states have call successors, (26), 20 states have call predecessors, (26), 17 states have return successors, (43), 27 states have call predecessors, (43), 26 states have call successors, (43) [2025-03-03 14:35:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2025-03-03 14:35:49,131 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 460 [2025-03-03 14:35:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:49,132 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2025-03-03 14:35:49,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (23), 10 states have call predecessors, (23), 13 states have call successors, (23) [2025-03-03 14:35:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2025-03-03 14:35:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2025-03-03 14:35:49,133 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:49,134 INFO L218 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:49,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-03 14:35:49,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-03 14:35:49,334 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:49,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 692310468, now seen corresponding path program 20 times [2025-03-03 14:35:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942385422] [2025-03-03 14:35:49,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:49,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 460 statements into 2 equivalence classes. [2025-03-03 14:35:49,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 460 of 460 statements. [2025-03-03 14:35:49,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:49,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-03-03 14:35:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942385422] [2025-03-03 14:35:52,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942385422] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:52,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617639209] [2025-03-03 14:35:52,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:35:52,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:52,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:52,706 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:52,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 14:35:52,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 460 statements into 2 equivalence classes. [2025-03-03 14:35:52,993 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 460 of 460 statements. [2025-03-03 14:35:52,993 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:35:52,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:53,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 271 conjuncts are in the unsatisfiable core [2025-03-03 14:35:53,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-03-03 14:35:53,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2025-03-03 14:35:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617639209] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:55,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:55,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 52 [2025-03-03 14:35:55,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132287858] [2025-03-03 14:35:55,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:55,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-03-03 14:35:55,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:55,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-03-03 14:35:55,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 14:35:55,002 INFO L87 Difference]: Start difference. First operand 148 states and 184 transitions. Second operand has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 27 states have internal predecessors, (63), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) [2025-03-03 14:35:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:55,345 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2025-03-03 14:35:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-03-03 14:35:55,346 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 27 states have internal predecessors, (63), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) Word has length 460 [2025-03-03 14:35:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:55,347 INFO L225 Difference]: With dead ends: 179 [2025-03-03 14:35:55,347 INFO L226 Difference]: Without dead ends: 172 [2025-03-03 14:35:55,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2025-03-03 14:35:55,348 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:55,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2609 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:35:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-03-03 14:35:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2025-03-03 14:35:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 114 states have internal predecessors, (129), 30 states have call successors, (30), 20 states have call predecessors, (30), 22 states have return successors, (53), 36 states have call predecessors, (53), 30 states have call successors, (53) [2025-03-03 14:35:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2025-03-03 14:35:55,359 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 460 [2025-03-03 14:35:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:55,359 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2025-03-03 14:35:55,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 27 states have internal predecessors, (63), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (35), 35 states have call predecessors, (35), 11 states have call successors, (35) [2025-03-03 14:35:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2025-03-03 14:35:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2025-03-03 14:35:55,361 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:55,361 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 35, 35, 30, 29, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:55,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-03 14:35:55,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 14:35:55,562 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:55,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -229283391, now seen corresponding path program 21 times [2025-03-03 14:35:55,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:55,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880048178] [2025-03-03 14:35:55,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:55,572 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 501 statements into 32 equivalence classes. [2025-03-03 14:35:55,586 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 230 of 501 statements. [2025-03-03 14:35:55,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-03 14:35:55,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1189 proven. 195 refuted. 0 times theorem prover too weak. 5877 trivial. 0 not checked. [2025-03-03 14:35:55,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880048178] [2025-03-03 14:35:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880048178] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863237833] [2025-03-03 14:35:55,731 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:55,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:55,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:55,733 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:55,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 14:35:55,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 501 statements into 32 equivalence classes. [2025-03-03 14:35:56,029 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) and asserted 230 of 501 statements. [2025-03-03 14:35:56,030 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2025-03-03 14:35:56,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:56,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:35:56,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1201 proven. 210 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2025-03-03 14:35:56,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7261 backedges. 1203 proven. 214 refuted. 0 times theorem prover too weak. 5844 trivial. 0 not checked. [2025-03-03 14:35:57,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863237833] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:57,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:57,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 24 [2025-03-03 14:35:57,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214280051] [2025-03-03 14:35:57,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:57,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:35:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:57,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:35:57,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:35:57,493 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 13 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (27), 14 states have call predecessors, (27), 13 states have call successors, (27) [2025-03-03 14:35:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:57,767 INFO L93 Difference]: Finished difference Result 199 states and 250 transitions. [2025-03-03 14:35:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:35:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 13 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (27), 14 states have call predecessors, (27), 13 states have call successors, (27) Word has length 501 [2025-03-03 14:35:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:57,769 INFO L225 Difference]: With dead ends: 199 [2025-03-03 14:35:57,769 INFO L226 Difference]: Without dead ends: 182 [2025-03-03 14:35:57,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 988 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:35:57,770 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 93 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:57,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 242 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:35:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2025-03-03 14:35:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2025-03-03 14:35:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 117 states have internal predecessors, (135), 32 states have call successors, (32), 22 states have call predecessors, (32), 21 states have return successors, (52), 36 states have call predecessors, (52), 32 states have call successors, (52) [2025-03-03 14:35:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 219 transitions. [2025-03-03 14:35:57,784 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 219 transitions. Word has length 501 [2025-03-03 14:35:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:57,785 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 219 transitions. [2025-03-03 14:35:57,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 13 states have call successors, (23), 1 states have call predecessors, (23), 10 states have return successors, (27), 14 states have call predecessors, (27), 13 states have call successors, (27) [2025-03-03 14:35:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 219 transitions. [2025-03-03 14:35:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-03 14:35:57,787 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:57,787 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:57,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-03 14:35:57,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-03 14:35:57,988 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:57,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash -970435744, now seen corresponding path program 22 times [2025-03-03 14:35:57,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:57,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085546152] [2025-03-03 14:35:57,989 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:57,998 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 487 statements into 2 equivalence classes. [2025-03-03 14:35:58,010 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 414 of 487 statements. [2025-03-03 14:35:58,010 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:58,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 280 proven. 1009 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2025-03-03 14:35:58,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085546152] [2025-03-03 14:35:58,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085546152] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630277453] [2025-03-03 14:35:58,193 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:58,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:58,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:58,195 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:35:58,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 14:35:58,409 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 487 statements into 2 equivalence classes. [2025-03-03 14:35:58,462 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 414 of 487 statements. [2025-03-03 14:35:58,462 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:58,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:58,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:35:58,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 276 proven. 1277 refuted. 0 times theorem prover too weak. 5287 trivial. 0 not checked. [2025-03-03 14:35:58,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 276 proven. 1317 refuted. 0 times theorem prover too weak. 5247 trivial. 0 not checked. [2025-03-03 14:36:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630277453] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:00,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:00,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 21] total 27 [2025-03-03 14:36:00,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705461738] [2025-03-03 14:36:00,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:00,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:36:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:00,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:36:00,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:36:00,956 INFO L87 Difference]: Start difference. First operand 176 states and 219 transitions. Second operand has 27 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 21 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 13 states have call predecessors, (33), 21 states have call successors, (33) [2025-03-03 14:36:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:01,130 INFO L93 Difference]: Finished difference Result 183 states and 225 transitions. [2025-03-03 14:36:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:36:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 21 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 13 states have call predecessors, (33), 21 states have call successors, (33) Word has length 487 [2025-03-03 14:36:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:01,132 INFO L225 Difference]: With dead ends: 183 [2025-03-03 14:36:01,132 INFO L226 Difference]: Without dead ends: 156 [2025-03-03 14:36:01,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 956 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2025-03-03 14:36:01,133 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:01,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 415 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:36:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-03 14:36:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2025-03-03 14:36:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 102 states have internal predecessors, (119), 27 states have call successors, (27), 21 states have call predecessors, (27), 17 states have return successors, (36), 28 states have call predecessors, (36), 27 states have call successors, (36) [2025-03-03 14:36:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 182 transitions. [2025-03-03 14:36:01,142 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 182 transitions. Word has length 487 [2025-03-03 14:36:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:01,142 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 182 transitions. [2025-03-03 14:36:01,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 21 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 13 states have call predecessors, (33), 21 states have call successors, (33) [2025-03-03 14:36:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 182 transitions. [2025-03-03 14:36:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-03 14:36:01,144 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:36:01,144 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:01,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-03 14:36:01,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:01,345 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:36:01,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:36:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1396638252, now seen corresponding path program 23 times [2025-03-03 14:36:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:36:01,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407241810] [2025-03-03 14:36:01,345 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:36:01,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:36:01,355 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 32 equivalence classes. [2025-03-03 14:36:01,376 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 450 of 487 statements. [2025-03-03 14:36:01,376 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-03-03 14:36:01,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1307 proven. 287 refuted. 0 times theorem prover too weak. 5246 trivial. 0 not checked. [2025-03-03 14:36:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:36:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407241810] [2025-03-03 14:36:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407241810] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:36:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417157433] [2025-03-03 14:36:01,638 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:36:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:01,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:36:01,640 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:36:01,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-03 14:36:01,878 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 32 equivalence classes. [2025-03-03 14:36:01,954 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 450 of 487 statements. [2025-03-03 14:36:01,954 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-03-03 14:36:01,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:36:01,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:36:01,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:36:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1261 proven. 279 refuted. 0 times theorem prover too weak. 5300 trivial. 0 not checked. [2025-03-03 14:36:02,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:36:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 1263 proven. 286 refuted. 0 times theorem prover too weak. 5291 trivial. 0 not checked. [2025-03-03 14:36:03,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417157433] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:36:03,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:36:03,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2025-03-03 14:36:03,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380976921] [2025-03-03 14:36:03,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:36:03,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:36:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:36:03,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:36:03,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:36:03,447 INFO L87 Difference]: Start difference. First operand 152 states and 182 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 18 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (32), 15 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 14:36:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:36:03,880 INFO L93 Difference]: Finished difference Result 171 states and 205 transitions. [2025-03-03 14:36:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 14:36:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 18 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (32), 15 states have call predecessors, (32), 18 states have call successors, (32) Word has length 487 [2025-03-03 14:36:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:36:03,881 INFO L225 Difference]: With dead ends: 171 [2025-03-03 14:36:03,881 INFO L226 Difference]: Without dead ends: 0 [2025-03-03 14:36:03,882 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 959 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2025-03-03 14:36:03,882 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:36:03,882 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 368 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:36:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-03-03 14:36:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-03-03 14:36:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-03 14:36:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-03-03 14:36:03,883 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 487 [2025-03-03 14:36:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:36:03,883 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-03-03 14:36:03,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 18 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (32), 15 states have call predecessors, (32), 18 states have call successors, (32) [2025-03-03 14:36:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-03-03 14:36:03,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-03-03 14:36:03,885 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-03-03 14:36:03,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-03 14:36:04,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:36:04,092 INFO L422 BasicCegarLoop]: Path program histogram: [23, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:36:04,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.