./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.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_15-1.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 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 14:33:55,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 14:33:56,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 14:33:56,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 14:33:56,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 14:33:56,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 14:33:56,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 14:33:56,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 14:33:56,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 14:33:56,049 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 14:33:56,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 14:33:56,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 14:33:56,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 14:33:56,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 14:33:56,049 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 14:33:56,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 14:33:56,050 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 14:33:56,051 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 14:33:56,052 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 14:33:56,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:56,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 14:33:56,053 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 14:33:56,053 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 -> 532954920d93df80ec8903cd7069d46bd3e41c8f10c6c2a8e6416a137735480b [2025-03-03 14:33:56,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 14:33:56,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 14:33:56,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 14:33:56,285 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 14:33:56,285 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 14:33:56,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2025-03-03 14:33:57,386 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b09f1f1a/88cadf28cd784b13abab5da1362c3040/FLAG03c7c9245 [2025-03-03 14:33:57,611 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 14:33:57,612 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_15-1.c [2025-03-03 14:33:57,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b09f1f1a/88cadf28cd784b13abab5da1362c3040/FLAG03c7c9245 [2025-03-03 14:33:57,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b09f1f1a/88cadf28cd784b13abab5da1362c3040 [2025-03-03 14:33:57,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 14:33:57,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 14:33:57,973 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:57,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 14:33:57,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 14:33:57,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:57" (1/1) ... [2025-03-03 14:33:57,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3e29ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:57, skipping insertion in model container [2025-03-03 14:33:57,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 02:33:57" (1/1) ... [2025-03-03 14:33:57,985 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 14:33:58,097 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_15-1.c[950,963] [2025-03-03 14:33:58,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:58,106 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 14:33:58,116 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_15-1.c[950,963] [2025-03-03 14:33:58,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 14:33:58,126 INFO L204 MainTranslator]: Completed translation [2025-03-03 14:33:58,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58 WrapperNode [2025-03-03 14:33:58,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 14:33:58,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:58,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 14:33:58,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 14:33:58,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,149 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-03 14:33:58,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 14:33:58,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 14:33:58,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 14:33:58,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 14:33:58,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,162 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 14:33:58,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,167 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,168 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 14:33:58,169 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 14:33:58,169 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 14:33:58,169 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 14:33:58,170 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (1/1) ... [2025-03-03 14:33:58,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 14:33:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:58,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 14:33:58,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 14:33:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 14:33:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 14:33:58,219 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-03 14:33:58,220 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-03 14:33:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-03 14:33:58,220 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-03 14:33:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 14:33:58,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 14:33:58,260 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 14:33:58,262 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 14:33:58,322 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-03 14:33:58,336 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-03 14:33:58,341 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-03 14:33:58,341 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 14:33:58,350 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 14:33:58,351 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 14:33:58,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:58 BoogieIcfgContainer [2025-03-03 14:33:58,351 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 14:33:58,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 14:33:58,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 14:33:58,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 14:33:58,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 02:33:57" (1/3) ... [2025-03-03 14:33:58,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd8a7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:58, skipping insertion in model container [2025-03-03 14:33:58,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 02:33:58" (2/3) ... [2025-03-03 14:33:58,358 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd8a7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 02:33:58, skipping insertion in model container [2025-03-03 14:33:58,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 02:33:58" (3/3) ... [2025-03-03 14:33:58,359 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-1.c [2025-03-03 14:33:58,370 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 14:33:58,371 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_15-1.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-03 14:33:58,412 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 14:33:58,421 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;@342f31d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 14:33:58,421 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 14:33:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:33:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-03 14:33:58,427 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:58,428 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:58,428 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:58,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-03 14:33:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952583843] [2025-03-03 14:33:58,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:58,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-03 14:33:58,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-03 14:33:58,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:33:58,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:58,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952583843] [2025-03-03 14:33:58,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952583843] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:58,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:58,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527224708] [2025-03-03 14:33:58,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:58,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:58,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:58,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:58,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:58,617 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:58,655 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2025-03-03 14:33:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-03 14:33:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:58,662 INFO L225 Difference]: With dead ends: 39 [2025-03-03 14:33:58,662 INFO L226 Difference]: Without dead ends: 27 [2025-03-03 14:33:58,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:58,667 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:58,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-03-03 14:33:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-03-03 14:33:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:33:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:33:58,696 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-03 14:33:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:58,696 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:33:58,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:33:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-03 14:33:58,697 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:58,697 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:58,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 14:33:58,697 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:58,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-03 14:33:58,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:58,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495987354] [2025-03-03 14:33:58,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:58,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-03 14:33:58,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-03 14:33:58,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-03 14:33:58,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495987354] [2025-03-03 14:33:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495987354] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 14:33:58,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 14:33:58,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 14:33:58,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757979191] [2025-03-03 14:33:58,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 14:33:58,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 14:33:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:58,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 14:33:58,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:58,758 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:58,776 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-03 14:33:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 14:33:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-03 14:33:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:58,777 INFO L225 Difference]: With dead ends: 33 [2025-03-03 14:33:58,777 INFO L226 Difference]: Without dead ends: 29 [2025-03-03 14:33:58,777 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 14:33:58,778 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:58,778 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 14:33:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-03 14:33:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-03 14:33:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-03 14:33:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-03 14:33:58,782 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-03 14:33:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:58,782 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-03 14:33:58,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-03 14:33:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-03 14:33:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-03 14:33:58,783 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:58,783 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:58,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 14:33:58,783 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:58,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-03 14:33:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:58,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621184967] [2025-03-03 14:33:58,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:58,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:58,790 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:58,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:58,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621184967] [2025-03-03 14:33:58,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621184967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:58,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133885709] [2025-03-03 14:33:58,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:58,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:58,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:58,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 14:33:58,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-03 14:33:58,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-03 14:33:58,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:58,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:58,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:58,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:59,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:59,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133885709] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:59,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:59,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-03 14:33:59,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372980334] [2025-03-03 14:33:59,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:59,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-03 14:33:59,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:59,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-03 14:33:59,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-03 14:33:59,174 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:33:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:59,275 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-03 14:33:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 14:33:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2025-03-03 14:33:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:59,277 INFO L225 Difference]: With dead ends: 55 [2025-03-03 14:33:59,277 INFO L226 Difference]: Without dead ends: 31 [2025-03-03 14:33:59,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:33:59,279 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:59,279 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 105 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-03 14:33:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-03 14:33:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2025-03-03 14:33:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-03 14:33:59,283 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-03 14:33:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:59,284 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-03 14:33:59,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2025-03-03 14:33:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-03 14:33:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-03 14:33:59,285 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:59,285 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:59,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 14:33:59,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:59,485 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:33:59,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:33:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-03 14:33:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:33:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10758398] [2025-03-03 14:33:59,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:33:59,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:59,507 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:59,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:59,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:59,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:33:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10758398] [2025-03-03 14:33:59,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10758398] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:33:59,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712568444] [2025-03-03 14:33:59,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:33:59,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:33:59,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:33:59,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:33:59,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 14:33:59,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-03 14:33:59,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-03 14:33:59,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:33:59,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:33:59,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-03 14:33:59,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:33:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:59,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:33:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-03 14:33:59,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712568444] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:33:59,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:33:59,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-03 14:33:59,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468264084] [2025-03-03 14:33:59,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:33:59,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 14:33:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:33:59,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 14:33:59,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-03 14:33:59,779 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:33:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:33:59,867 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-03 14:33:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 14:33:59,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2025-03-03 14:33:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:33:59,868 INFO L225 Difference]: With dead ends: 40 [2025-03-03 14:33:59,869 INFO L226 Difference]: Without dead ends: 36 [2025-03-03 14:33:59,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-03 14:33:59,869 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:33:59,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:33:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-03 14:33:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-03 14:33:59,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2025-03-03 14:33:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-03 14:33:59,875 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-03 14:33:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:33:59,875 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-03 14:33:59,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 14:33:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-03 14:33:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-03 14:33:59,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:33:59,876 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:33:59,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:00,076 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 14:34:00,077 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:00,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-03 14:34:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841501626] [2025-03-03 14:34:00,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:00,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:34:00,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:34:00,088 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:00,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,143 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 14:34:00,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:00,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841501626] [2025-03-03 14:34:00,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841501626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:00,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816407050] [2025-03-03 14:34:00,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:00,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:00,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:00,146 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 14:34:00,147 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 14:34:00,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-03 14:34:00,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-03 14:34:00,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:00,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:00,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:00,244 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 14:34:00,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:00,501 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 14:34:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816407050] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:00,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:00,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-03 14:34:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947264277] [2025-03-03 14:34:00,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:00,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 14:34:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:00,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 14:34:00,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 14:34:00,505 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 14:34:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:00,650 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-03 14:34:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 14:34:00,650 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 14:34:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:00,651 INFO L225 Difference]: With dead ends: 69 [2025-03-03 14:34:00,651 INFO L226 Difference]: Without dead ends: 38 [2025-03-03 14:34:00,652 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 14:34:00,652 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:00,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 146 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-03 14:34:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-03 14:34:00,657 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 14:34:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-03 14:34:00,658 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-03 14:34:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:00,658 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-03 14:34:00,658 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 14:34:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-03 14:34:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-03 14:34:00,659 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:00,659 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 14:34:00,665 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 14:34:00,863 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 14:34:00,863 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:00,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-03 14:34:00,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:00,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530499369] [2025-03-03 14:34:00,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:00,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:34:00,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:34:00,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:00,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,966 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 14:34:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530499369] [2025-03-03 14:34:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530499369] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250470943] [2025-03-03 14:34:00,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:00,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:00,968 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 14:34:00,970 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 14:34:00,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-03 14:34:00,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-03 14:34:00,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:00,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:00,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-03 14:34:01,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:01,063 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 14:34:01,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:01,285 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 14:34:01,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250470943] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:01,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:01,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-03 14:34:01,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188970707] [2025-03-03 14:34:01,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:01,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:01,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:01,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:01,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:01,287 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 14:34:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:01,603 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-03 14:34:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:01,605 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 14:34:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:01,607 INFO L225 Difference]: With dead ends: 101 [2025-03-03 14:34:01,607 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 14:34:01,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:34:01,609 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:01,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 14:34:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-03 14:34:01,617 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 14:34:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-03 14:34:01,618 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-03 14:34:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:01,619 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-03 14:34:01,619 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 14:34:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-03 14:34:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 14:34:01,621 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:01,621 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 14:34:01,626 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 14:34:01,825 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 14:34:01,825 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:01,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-03 14:34:01,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:01,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731705218] [2025-03-03 14:34:01,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:01,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:34:01,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:34:01,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:01,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:01,922 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 14:34:01,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731705218] [2025-03-03 14:34:01,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731705218] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538848857] [2025-03-03 14:34:01,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:01,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:01,926 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 14:34:01,927 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 14:34:01,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 14:34:01,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 14:34:01,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:01,962 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:01,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:01,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:02,016 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 14:34:02,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:02,387 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 14:34:02,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538848857] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:02,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:02,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-03 14:34:02,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021733267] [2025-03-03 14:34:02,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:02,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:34:02,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:02,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:34:02,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:34:02,391 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 14:34:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:02,546 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-03 14:34:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:02,547 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 14:34:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:02,548 INFO L225 Difference]: With dead ends: 102 [2025-03-03 14:34:02,548 INFO L226 Difference]: Without dead ends: 98 [2025-03-03 14:34:02,548 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 14:34:02,549 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:02,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 161 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-03 14:34:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-03 14:34:02,558 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 14:34:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-03 14:34:02,559 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-03 14:34:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:02,559 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-03 14:34:02,559 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 14:34:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-03 14:34:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-03 14:34:02,562 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:02,562 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 14:34:02,567 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 14:34:02,766 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 14:34:02,766 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:02,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-03 14:34:02,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:02,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487800693] [2025-03-03 14:34:02,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:02,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:02,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:34:02,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:02,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:02,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,893 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 14:34:02,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:02,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487800693] [2025-03-03 14:34:02,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487800693] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:02,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721865158] [2025-03-03 14:34:02,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:02,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:02,896 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 14:34:02,897 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 14:34:02,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-03 14:34:02,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-03 14:34:02,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:02,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:02,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:02,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:03,035 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 14:34:03,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:03,719 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 14:34:03,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721865158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:03,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:03,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-03 14:34:03,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298125607] [2025-03-03 14:34:03,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:03,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:03,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:03,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:03,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:03,721 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 14:34:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:04,177 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-03 14:34:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-03 14:34:04,178 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 14:34:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:04,180 INFO L225 Difference]: With dead ends: 177 [2025-03-03 14:34:04,181 INFO L226 Difference]: Without dead ends: 104 [2025-03-03 14:34:04,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:34:04,184 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:04,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 352 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:34:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-03 14:34:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-03 14:34:04,199 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 14:34:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-03 14:34:04,202 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-03 14:34:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:04,202 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-03 14:34:04,202 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 14:34:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-03 14:34:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-03-03 14:34:04,204 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:04,204 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:04,211 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 14:34:04,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:04,404 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:04,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 869810860, now seen corresponding path program 1 times [2025-03-03 14:34:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:04,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119340311] [2025-03-03 14:34:04,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:04,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:04,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-03 14:34:04,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 14:34:04,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:04,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2025-03-03 14:34:04,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:04,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119340311] [2025-03-03 14:34:04,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119340311] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:04,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898631939] [2025-03-03 14:34:04,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 14:34:04,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:04,564 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:04,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 14:34:04,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-03-03 14:34:04,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-03-03 14:34:04,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:04,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:04,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:04,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 205 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2025-03-03 14:34:04,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 36 proven. 221 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2025-03-03 14:34:05,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898631939] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:05,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:05,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-03 14:34:05,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419076086] [2025-03-03 14:34:05,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:05,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-03 14:34:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:05,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-03 14:34:05,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:05,716 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:34:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:05,900 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-03 14:34:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-03 14:34:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 146 [2025-03-03 14:34:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:05,903 INFO L225 Difference]: With dead ends: 132 [2025-03-03 14:34:05,903 INFO L226 Difference]: Without dead ends: 128 [2025-03-03 14:34:05,903 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-03 14:34:05,904 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:05,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 209 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-03 14:34:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-03 14:34:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2025-03-03 14:34:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-03 14:34:05,928 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 146 [2025-03-03 14:34:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:05,928 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-03 14:34:05,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2025-03-03 14:34:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-03 14:34:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2025-03-03 14:34:05,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:05,931 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 19, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:05,937 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 14:34:06,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:06,136 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:06,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 108794173, now seen corresponding path program 2 times [2025-03-03 14:34:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:06,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880174087] [2025-03-03 14:34:06,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:06,148 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-03 14:34:06,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-03 14:34:06,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:06,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-03 14:34:06,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:06,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880174087] [2025-03-03 14:34:06,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880174087] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390621827] [2025-03-03 14:34:06,478 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:06,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:06,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 14:34:06,533 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 285 statements into 2 equivalence classes. [2025-03-03 14:34:06,576 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 285 of 285 statements. [2025-03-03 14:34:06,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:06,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:06,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-03 14:34:06,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 566 refuted. 0 times theorem prover too weak. 1591 trivial. 0 not checked. [2025-03-03 14:34:06,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 94 proven. 590 refuted. 0 times theorem prover too weak. 1567 trivial. 0 not checked. [2025-03-03 14:34:07,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390621827] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:07,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:07,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-03-03 14:34:07,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865586333] [2025-03-03 14:34:07,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:07,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 14:34:07,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:07,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 14:34:07,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-03 14:34:07,941 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-03-03 14:34:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:08,125 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-03 14:34:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 285 [2025-03-03 14:34:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:08,128 INFO L225 Difference]: With dead ends: 148 [2025-03-03 14:34:08,128 INFO L226 Difference]: Without dead ends: 144 [2025-03-03 14:34:08,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 560 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:08,129 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:08,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 174 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-03 14:34:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-03 14:34:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 76 states have internal predecessors, (85), 20 states have call successors, (20), 8 states have call predecessors, (20), 18 states have return successors, (75), 28 states have call predecessors, (75), 20 states have call successors, (75) [2025-03-03 14:34:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-03 14:34:08,142 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 285 [2025-03-03 14:34:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:08,143 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-03 14:34:08,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 20 states have internal predecessors, (69), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2025-03-03 14:34:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-03 14:34:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2025-03-03 14:34:08,147 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:08,147 INFO L218 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 23, 21, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 10, 7, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:08,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:08,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 14:34:08,348 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:08,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash -935726768, now seen corresponding path program 3 times [2025-03-03 14:34:08,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:08,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432802722] [2025-03-03 14:34:08,348 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:08,359 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-03 14:34:08,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-03 14:34:08,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:34:08,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 564 proven. 88 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2025-03-03 14:34:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432802722] [2025-03-03 14:34:08,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432802722] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:08,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156336931] [2025-03-03 14:34:08,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:08,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:08,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:08,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 14:34:08,573 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 378 statements into 23 equivalence classes. [2025-03-03 14:34:08,595 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 120 of 378 statements. [2025-03-03 14:34:08,595 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-03 14:34:08,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:08,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:08,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 575 proven. 91 refuted. 0 times theorem prover too weak. 3389 trivial. 0 not checked. [2025-03-03 14:34:08,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4055 backedges. 579 proven. 97 refuted. 0 times theorem prover too weak. 3379 trivial. 0 not checked. [2025-03-03 14:34:09,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156336931] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:09,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:09,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 18 [2025-03-03 14:34:09,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360555906] [2025-03-03 14:34:09,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:09,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-03 14:34:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:09,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-03 14:34:09,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-03-03 14:34:09,677 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-03 14:34:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:09,830 INFO L93 Difference]: Finished difference Result 159 states and 292 transitions. [2025-03-03 14:34:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-03 14:34:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 378 [2025-03-03 14:34:09,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:09,833 INFO L225 Difference]: With dead ends: 159 [2025-03-03 14:34:09,833 INFO L226 Difference]: Without dead ends: 155 [2025-03-03 14:34:09,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 746 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:34:09,834 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:09,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-03 14:34:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2025-03-03 14:34:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 92 states have (on average 1.1630434782608696) internal successors, (107), 94 states have internal predecessors, (107), 26 states have call successors, (26), 10 states have call predecessors, (26), 22 states have return successors, (116), 36 states have call predecessors, (116), 26 states have call successors, (116) [2025-03-03 14:34:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 249 transitions. [2025-03-03 14:34:09,852 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 249 transitions. Word has length 378 [2025-03-03 14:34:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:09,854 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 249 transitions. [2025-03-03 14:34:09,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 12 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-03 14:34:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 249 transitions. [2025-03-03 14:34:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2025-03-03 14:34:09,858 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:09,858 INFO L218 NwaCegarLoop]: trace histogram [54, 54, 45, 45, 42, 39, 27, 27, 27, 27, 27, 27, 27, 22, 22, 22, 22, 22, 22, 22, 20, 12, 12, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:09,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:10,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:10,059 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:10,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -353738821, now seen corresponding path program 4 times [2025-03-03 14:34:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742087797] [2025-03-03 14:34:10,060 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:10,075 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-03 14:34:10,120 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 577 of 679 statements. [2025-03-03 14:34:10,120 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:10,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 278 proven. 1247 refuted. 0 times theorem prover too weak. 12089 trivial. 0 not checked. [2025-03-03 14:34:10,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:10,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742087797] [2025-03-03 14:34:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742087797] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:10,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093851254] [2025-03-03 14:34:10,412 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:10,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:10,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:10,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:10,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 14:34:10,505 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 679 statements into 2 equivalence classes. [2025-03-03 14:34:10,592 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 577 of 679 statements. [2025-03-03 14:34:10,592 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:10,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:10,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 14:34:10,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 2271 proven. 19 refuted. 0 times theorem prover too weak. 11324 trivial. 0 not checked. [2025-03-03 14:34:10,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13614 backedges. 278 proven. 1435 refuted. 0 times theorem prover too weak. 11901 trivial. 0 not checked. [2025-03-03 14:34:12,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093851254] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:12,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:12,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2025-03-03 14:34:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608712949] [2025-03-03 14:34:12,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:12,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-03 14:34:12,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:12,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-03 14:34:12,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2025-03-03 14:34:12,364 INFO L87 Difference]: Start difference. First operand 141 states and 249 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-03-03 14:34:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:12,500 INFO L93 Difference]: Finished difference Result 271 states and 534 transitions. [2025-03-03 14:34:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-03 14:34:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 679 [2025-03-03 14:34:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:12,502 INFO L225 Difference]: With dead ends: 271 [2025-03-03 14:34:12,502 INFO L226 Difference]: Without dead ends: 138 [2025-03-03 14:34:12,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1373 GetRequests, 1347 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2025-03-03 14:34:12,503 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:12,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 228 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-03 14:34:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2025-03-03 14:34:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.120879120879121) internal successors, (102), 92 states have internal predecessors, (102), 25 states have call successors, (25), 11 states have call predecessors, (25), 21 states have return successors, (100), 34 states have call predecessors, (100), 25 states have call successors, (100) [2025-03-03 14:34:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 227 transitions. [2025-03-03 14:34:12,517 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 227 transitions. Word has length 679 [2025-03-03 14:34:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:12,518 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 227 transitions. [2025-03-03 14:34:12,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2025-03-03 14:34:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 227 transitions. [2025-03-03 14:34:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2025-03-03 14:34:12,520 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:12,520 INFO L218 NwaCegarLoop]: trace histogram [37, 37, 34, 34, 31, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 14, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:12,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:12,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 14:34:12,721 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:12,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash 727265831, now seen corresponding path program 5 times [2025-03-03 14:34:12,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:12,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839571076] [2025-03-03 14:34:12,722 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:12,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:12,732 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 33 equivalence classes. [2025-03-03 14:34:12,760 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 259 of 487 statements. [2025-03-03 14:34:12,761 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-03-03 14:34:12,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 333 proven. 1125 refuted. 0 times theorem prover too weak. 5396 trivial. 0 not checked. [2025-03-03 14:34:13,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839571076] [2025-03-03 14:34:13,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839571076] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385185232] [2025-03-03 14:34:13,026 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:13,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:13,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:13,029 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 14:34:13,122 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 487 statements into 33 equivalence classes. [2025-03-03 14:34:13,182 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) and asserted 259 of 487 statements. [2025-03-03 14:34:13,182 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2025-03-03 14:34:13,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:13,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:13,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 2996 proven. 111 refuted. 0 times theorem prover too weak. 3747 trivial. 0 not checked. [2025-03-03 14:34:13,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6854 backedges. 331 proven. 1105 refuted. 0 times theorem prover too weak. 5418 trivial. 0 not checked. [2025-03-03 14:34:14,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385185232] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:14,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:14,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 15] total 24 [2025-03-03 14:34:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932631308] [2025-03-03 14:34:14,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:14,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-03 14:34:14,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:14,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-03 14:34:14,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2025-03-03 14:34:14,589 INFO L87 Difference]: Start difference. First operand 138 states and 227 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 15 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2025-03-03 14:34:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:14,896 INFO L93 Difference]: Finished difference Result 286 states and 597 transitions. [2025-03-03 14:34:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-03 14:34:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 15 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) Word has length 487 [2025-03-03 14:34:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:14,899 INFO L225 Difference]: With dead ends: 286 [2025-03-03 14:34:14,900 INFO L226 Difference]: Without dead ends: 132 [2025-03-03 14:34:14,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 960 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:34:14,903 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:14,903 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 280 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-03 14:34:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2025-03-03 14:34:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 82 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 17 states have return successors, (80), 28 states have call predecessors, (80), 22 states have call successors, (80) [2025-03-03 14:34:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 195 transitions. [2025-03-03 14:34:14,913 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 195 transitions. Word has length 487 [2025-03-03 14:34:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:14,913 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 195 transitions. [2025-03-03 14:34:14,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 15 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (35), 14 states have call predecessors, (35), 15 states have call successors, (35) [2025-03-03 14:34:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 195 transitions. [2025-03-03 14:34:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2025-03-03 14:34:14,917 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:14,918 INFO L218 NwaCegarLoop]: trace histogram [66, 66, 57, 57, 53, 48, 33, 33, 33, 33, 33, 33, 33, 28, 28, 28, 28, 28, 28, 28, 20, 20, 18, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:15,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 14:34:15,118 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:15,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1817300715, now seen corresponding path program 6 times [2025-03-03 14:34:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:15,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209957882] [2025-03-03 14:34:15,119 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:15,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:15,135 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 843 statements into 53 equivalence classes. [2025-03-03 14:34:15,168 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 235 of 843 statements. [2025-03-03 14:34:15,168 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-03 14:34:15,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21094 backedges. 2168 proven. 89 refuted. 0 times theorem prover too weak. 18837 trivial. 0 not checked. [2025-03-03 14:34:15,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209957882] [2025-03-03 14:34:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209957882] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653473972] [2025-03-03 14:34:15,323 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:15,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:15,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:15,325 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:15,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 14:34:15,433 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 843 statements into 53 equivalence classes. [2025-03-03 14:34:15,482 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 235 of 843 statements. [2025-03-03 14:34:15,482 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-03 14:34:15,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:15,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-03 14:34:15,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21094 backedges. 3044 proven. 51 refuted. 0 times theorem prover too weak. 17999 trivial. 0 not checked. [2025-03-03 14:34:15,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21094 backedges. 2166 proven. 92 refuted. 0 times theorem prover too weak. 18836 trivial. 0 not checked. [2025-03-03 14:34:17,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653473972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:17,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:17,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 19 [2025-03-03 14:34:17,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917195680] [2025-03-03 14:34:17,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:17,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-03 14:34:17,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:17,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-03 14:34:17,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-03 14:34:17,396 INFO L87 Difference]: Start difference. First operand 124 states and 195 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 10 states have call successors, (21), 2 states have call predecessors, (21), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-03 14:34:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:17,648 INFO L93 Difference]: Finished difference Result 268 states and 484 transitions. [2025-03-03 14:34:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 10 states have call successors, (21), 2 states have call predecessors, (21), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 843 [2025-03-03 14:34:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:17,650 INFO L225 Difference]: With dead ends: 268 [2025-03-03 14:34:17,650 INFO L226 Difference]: Without dead ends: 154 [2025-03-03 14:34:17,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1707 GetRequests, 1674 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:17,652 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:17,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 218 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-03 14:34:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2025-03-03 14:34:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 101 states have (on average 1.118811881188119) internal successors, (113), 97 states have internal predecessors, (113), 27 states have call successors, (27), 17 states have call predecessors, (27), 19 states have return successors, (101), 33 states have call predecessors, (101), 27 states have call successors, (101) [2025-03-03 14:34:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 241 transitions. [2025-03-03 14:34:17,664 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 241 transitions. Word has length 843 [2025-03-03 14:34:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:17,664 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 241 transitions. [2025-03-03 14:34:17,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 10 states have call successors, (21), 2 states have call predecessors, (21), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2025-03-03 14:34:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 241 transitions. [2025-03-03 14:34:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2025-03-03 14:34:17,667 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:17,667 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 32, 29, 29, 27, 21, 21, 21, 21, 21, 21, 21, 18, 14, 14, 14, 14, 14, 14, 14, 10, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:17,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-03 14:34:17,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-03 14:34:17,871 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:17,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1895292661, now seen corresponding path program 7 times [2025-03-03 14:34:17,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:17,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834395234] [2025-03-03 14:34:17,872 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:17,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:17,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 489 statements into 1 equivalence classes. [2025-03-03 14:34:17,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 489 of 489 statements. [2025-03-03 14:34:17,908 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:17,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 277 proven. 1037 refuted. 0 times theorem prover too weak. 5805 trivial. 0 not checked. [2025-03-03 14:34:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834395234] [2025-03-03 14:34:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834395234] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637515437] [2025-03-03 14:34:18,210 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:18,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:18,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:18,213 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:18,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 14:34:18,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 489 statements into 1 equivalence classes. [2025-03-03 14:34:18,393 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 489 of 489 statements. [2025-03-03 14:34:18,393 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:18,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:18,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:18,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 187 proven. 1228 refuted. 0 times theorem prover too weak. 5704 trivial. 0 not checked. [2025-03-03 14:34:18,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 187 proven. 1261 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2025-03-03 14:34:20,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637515437] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:20,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:20,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 31 [2025-03-03 14:34:20,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347267521] [2025-03-03 14:34:20,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:20,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 14:34:20,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:20,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 14:34:20,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:34:20,466 INFO L87 Difference]: Start difference. First operand 148 states and 241 transitions. Second operand has 31 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 31 states have internal predecessors, (101), 26 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-03-03 14:34:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:21,190 INFO L93 Difference]: Finished difference Result 373 states and 755 transitions. [2025-03-03 14:34:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-03 14:34:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 31 states have internal predecessors, (101), 26 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) Word has length 489 [2025-03-03 14:34:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:21,193 INFO L225 Difference]: With dead ends: 373 [2025-03-03 14:34:21,193 INFO L226 Difference]: Without dead ends: 214 [2025-03-03 14:34:21,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 954 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=567, Invalid=2973, Unknown=0, NotChecked=0, Total=3540 [2025-03-03 14:34:21,196 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 129 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:21,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 578 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 14:34:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-03-03 14:34:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 177. [2025-03-03 14:34:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 119 states have internal predecessors, (140), 33 states have call successors, (33), 23 states have call predecessors, (33), 20 states have return successors, (111), 34 states have call predecessors, (111), 33 states have call successors, (111) [2025-03-03 14:34:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 284 transitions. [2025-03-03 14:34:21,213 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 284 transitions. Word has length 489 [2025-03-03 14:34:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:21,213 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 284 transitions. [2025-03-03 14:34:21,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 31 states have internal predecessors, (101), 26 states have call successors, (32), 1 states have call predecessors, (32), 13 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-03-03 14:34:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 284 transitions. [2025-03-03 14:34:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2025-03-03 14:34:21,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:21,219 INFO L218 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 35, 35, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 14, 13, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:21,225 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 14:34:21,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-03 14:34:21,419 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:21,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1730517890, now seen corresponding path program 8 times [2025-03-03 14:34:21,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:21,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727713335] [2025-03-03 14:34:21,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:21,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:21,436 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 596 statements into 2 equivalence classes. [2025-03-03 14:34:21,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 596 of 596 statements. [2025-03-03 14:34:21,487 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:21,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10350 backedges. 380 proven. 1157 refuted. 0 times theorem prover too weak. 8813 trivial. 0 not checked. [2025-03-03 14:34:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727713335] [2025-03-03 14:34:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727713335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728917808] [2025-03-03 14:34:21,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:21,856 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:21,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 14:34:21,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 596 statements into 2 equivalence classes. [2025-03-03 14:34:22,054 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 596 of 596 statements. [2025-03-03 14:34:22,054 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:22,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:22,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 1343 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-03 14:34:22,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10350 backedges. 264 proven. 1688 refuted. 0 times theorem prover too weak. 8398 trivial. 0 not checked. [2025-03-03 14:34:22,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10350 backedges. 264 proven. 1732 refuted. 0 times theorem prover too weak. 8354 trivial. 0 not checked. [2025-03-03 14:34:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728917808] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:24,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:24,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2025-03-03 14:34:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687196508] [2025-03-03 14:34:24,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:24,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 14:34:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:24,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 14:34:24,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2025-03-03 14:34:24,910 INFO L87 Difference]: Start difference. First operand 177 states and 284 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2025-03-03 14:34:25,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:25,131 INFO L93 Difference]: Finished difference Result 217 states and 393 transitions. [2025-03-03 14:34:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-03 14:34:25,132 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 596 [2025-03-03 14:34:25,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:25,134 INFO L225 Difference]: With dead ends: 217 [2025-03-03 14:34:25,134 INFO L226 Difference]: Without dead ends: 213 [2025-03-03 14:34:25,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1219 GetRequests, 1172 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2025-03-03 14:34:25,135 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:25,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 202 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2025-03-03 14:34:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2025-03-03 14:34:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 133 states have internal predecessors, (154), 37 states have call successors, (37), 23 states have call predecessors, (37), 25 states have return successors, (157), 43 states have call predecessors, (157), 37 states have call successors, (157) [2025-03-03 14:34:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 348 transitions. [2025-03-03 14:34:25,148 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 348 transitions. Word has length 596 [2025-03-03 14:34:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:25,148 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 348 transitions. [2025-03-03 14:34:25,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2025-03-03 14:34:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 348 transitions. [2025-03-03 14:34:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2286 [2025-03-03 14:34:25,168 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:25,168 INFO L218 NwaCegarLoop]: trace histogram [181, 181, 154, 154, 141, 130, 90, 90, 90, 90, 90, 90, 90, 77, 77, 77, 77, 77, 77, 77, 64, 40, 40, 24, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:25,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 14:34:25,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:25,373 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:25,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2128307305, now seen corresponding path program 9 times [2025-03-03 14:34:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:25,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326885052] [2025-03-03 14:34:25,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:25,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:25,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2285 statements into 145 equivalence classes. [2025-03-03 14:34:25,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 2285 statements. [2025-03-03 14:34:25,421 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:34:25,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 158263 backedges. 6473 proven. 46 refuted. 0 times theorem prover too weak. 151744 trivial. 0 not checked. [2025-03-03 14:34:25,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:25,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326885052] [2025-03-03 14:34:25,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326885052] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:25,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963577022] [2025-03-03 14:34:25,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:34:25,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:25,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:25,532 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:25,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 14:34:25,786 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2285 statements into 145 equivalence classes. [2025-03-03 14:34:25,812 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 2285 statements. [2025-03-03 14:34:25,812 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-03 14:34:25,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:25,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 14:34:25,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 158263 backedges. 7264 proven. 56 refuted. 0 times theorem prover too weak. 150943 trivial. 0 not checked. [2025-03-03 14:34:25,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 158263 backedges. 7264 proven. 61 refuted. 0 times theorem prover too weak. 150938 trivial. 0 not checked. [2025-03-03 14:34:30,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963577022] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:30,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:30,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 25 [2025-03-03 14:34:30,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196550397] [2025-03-03 14:34:30,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:30,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 14:34:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:30,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 14:34:30,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2025-03-03 14:34:30,913 INFO L87 Difference]: Start difference. First operand 200 states and 348 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 15 states have call successors, (23), 1 states have call predecessors, (23), 12 states have return successors, (31), 14 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-03 14:34:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:31,202 INFO L93 Difference]: Finished difference Result 428 states and 874 transitions. [2025-03-03 14:34:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 14:34:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 15 states have call successors, (23), 1 states have call predecessors, (23), 12 states have return successors, (31), 14 states have call predecessors, (31), 15 states have call successors, (31) Word has length 2285 [2025-03-03 14:34:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:31,205 INFO L225 Difference]: With dead ends: 428 [2025-03-03 14:34:31,205 INFO L226 Difference]: Without dead ends: 221 [2025-03-03 14:34:31,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4595 GetRequests, 4551 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 14:34:31,207 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 46 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:31,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 371 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:34:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2025-03-03 14:34:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 211. [2025-03-03 14:34:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 146 states have (on average 1.047945205479452) internal successors, (153), 142 states have internal predecessors, (153), 38 states have call successors, (38), 25 states have call predecessors, (38), 26 states have return successors, (152), 43 states have call predecessors, (152), 38 states have call successors, (152) [2025-03-03 14:34:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 343 transitions. [2025-03-03 14:34:31,222 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 343 transitions. Word has length 2285 [2025-03-03 14:34:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:31,222 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 343 transitions. [2025-03-03 14:34:31,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 15 states have call successors, (23), 1 states have call predecessors, (23), 12 states have return successors, (31), 14 states have call predecessors, (31), 15 states have call successors, (31) [2025-03-03 14:34:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 343 transitions. [2025-03-03 14:34:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1279 [2025-03-03 14:34:31,231 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:31,231 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 92, 92, 77, 75, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 31, 28, 18, 17, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:31,239 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 14:34:31,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-03 14:34:31,432 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:31,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1865075960, now seen corresponding path program 10 times [2025-03-03 14:34:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:31,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722621123] [2025-03-03 14:34:31,433 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:31,451 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1278 statements into 2 equivalence classes. [2025-03-03 14:34:31,542 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1088 of 1278 statements. [2025-03-03 14:34:31,542 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:31,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 48769 backedges. 887 proven. 4800 refuted. 0 times theorem prover too weak. 43082 trivial. 0 not checked. [2025-03-03 14:34:32,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:32,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722621123] [2025-03-03 14:34:32,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722621123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:32,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695302434] [2025-03-03 14:34:32,412 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:34:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:32,414 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:32,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 14:34:32,603 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1278 statements into 2 equivalence classes. [2025-03-03 14:34:32,735 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1088 of 1278 statements. [2025-03-03 14:34:32,735 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:34:32,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:32,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 2272 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:32,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48769 backedges. 12298 proven. 245 refuted. 0 times theorem prover too weak. 36226 trivial. 0 not checked. [2025-03-03 14:34:32,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 48769 backedges. 770 proven. 4545 refuted. 0 times theorem prover too weak. 43454 trivial. 0 not checked. [2025-03-03 14:34:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695302434] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:36,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:36,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 19] total 31 [2025-03-03 14:34:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202256622] [2025-03-03 14:34:36,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:36,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 14:34:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:36,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 14:34:36,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2025-03-03 14:34:36,441 INFO L87 Difference]: Start difference. First operand 211 states and 343 transitions. Second operand has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 23 states have call successors, (37), 2 states have call predecessors, (37), 14 states have return successors, (47), 19 states have call predecessors, (47), 23 states have call successors, (47) [2025-03-03 14:34:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:37,113 INFO L93 Difference]: Finished difference Result 462 states and 856 transitions. [2025-03-03 14:34:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-03 14:34:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 23 states have call successors, (37), 2 states have call predecessors, (37), 14 states have return successors, (47), 19 states have call predecessors, (47), 23 states have call successors, (47) Word has length 1278 [2025-03-03 14:34:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:37,116 INFO L225 Difference]: With dead ends: 462 [2025-03-03 14:34:37,116 INFO L226 Difference]: Without dead ends: 261 [2025-03-03 14:34:37,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2611 GetRequests, 2539 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=3548, Unknown=0, NotChecked=0, Total=4160 [2025-03-03 14:34:37,119 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:37,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 573 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 14:34:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2025-03-03 14:34:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 230. [2025-03-03 14:34:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.0372670807453417) internal successors, (167), 156 states have internal predecessors, (167), 44 states have call successors, (44), 31 states have call predecessors, (44), 24 states have return successors, (159), 42 states have call predecessors, (159), 44 states have call successors, (159) [2025-03-03 14:34:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 370 transitions. [2025-03-03 14:34:37,134 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 370 transitions. Word has length 1278 [2025-03-03 14:34:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:37,135 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 370 transitions. [2025-03-03 14:34:37,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 23 states have call successors, (37), 2 states have call predecessors, (37), 14 states have return successors, (47), 19 states have call predecessors, (47), 23 states have call successors, (47) [2025-03-03 14:34:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 370 transitions. [2025-03-03 14:34:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2025-03-03 14:34:37,143 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:37,143 INFO L218 NwaCegarLoop]: trace histogram [95, 95, 92, 92, 76, 75, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 30, 28, 19, 17, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:37,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-03 14:34:37,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-03 14:34:37,344 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:37,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash -828149948, now seen corresponding path program 11 times [2025-03-03 14:34:37,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:37,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138090417] [2025-03-03 14:34:37,344 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:37,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:37,364 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1277 statements into 84 equivalence classes. [2025-03-03 14:34:37,489 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) and asserted 1021 of 1277 statements. [2025-03-03 14:34:37,490 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2025-03-03 14:34:37,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 48693 backedges. 1274 proven. 4728 refuted. 0 times theorem prover too weak. 42691 trivial. 0 not checked. [2025-03-03 14:34:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138090417] [2025-03-03 14:34:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138090417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875376283] [2025-03-03 14:34:38,385 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-03 14:34:38,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:38,387 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:38,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 14:34:38,593 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1277 statements into 84 equivalence classes. [2025-03-03 14:34:38,847 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) and asserted 1021 of 1277 statements. [2025-03-03 14:34:38,847 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2025-03-03 14:34:38,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:38,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 2270 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:38,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 48693 backedges. 20449 proven. 568 refuted. 0 times theorem prover too weak. 27676 trivial. 0 not checked. [2025-03-03 14:34:38,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 48693 backedges. 1265 proven. 4755 refuted. 0 times theorem prover too weak. 42673 trivial. 0 not checked. [2025-03-03 14:34:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875376283] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:42,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:42,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 29 [2025-03-03 14:34:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314512521] [2025-03-03 14:34:42,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:42,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-03 14:34:42,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:42,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-03 14:34:42,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:42,993 INFO L87 Difference]: Start difference. First operand 230 states and 370 transitions. Second operand has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 21 states have call successors, (33), 2 states have call predecessors, (33), 12 states have return successors, (40), 14 states have call predecessors, (40), 21 states have call successors, (40) [2025-03-03 14:34:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:43,542 INFO L93 Difference]: Finished difference Result 550 states and 1020 transitions. [2025-03-03 14:34:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-03 14:34:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 21 states have call successors, (33), 2 states have call predecessors, (33), 12 states have return successors, (40), 14 states have call predecessors, (40), 21 states have call successors, (40) Word has length 1277 [2025-03-03 14:34:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:43,546 INFO L225 Difference]: With dead ends: 550 [2025-03-03 14:34:43,546 INFO L226 Difference]: Without dead ends: 260 [2025-03-03 14:34:43,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2597 GetRequests, 2538 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 14:34:43,549 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:43,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 451 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 14:34:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2025-03-03 14:34:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 243. [2025-03-03 14:34:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 170 states have (on average 1.035294117647059) internal successors, (176), 165 states have internal predecessors, (176), 47 states have call successors, (47), 33 states have call predecessors, (47), 25 states have return successors, (164), 44 states have call predecessors, (164), 47 states have call successors, (164) [2025-03-03 14:34:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 387 transitions. [2025-03-03 14:34:43,573 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 387 transitions. Word has length 1277 [2025-03-03 14:34:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:43,573 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 387 transitions. [2025-03-03 14:34:43,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 21 states have call successors, (33), 2 states have call predecessors, (33), 12 states have return successors, (40), 14 states have call predecessors, (40), 21 states have call successors, (40) [2025-03-03 14:34:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 387 transitions. [2025-03-03 14:34:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1714 [2025-03-03 14:34:43,589 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:43,589 INFO L218 NwaCegarLoop]: trace histogram [128, 128, 123, 123, 102, 101, 64, 64, 64, 64, 64, 64, 64, 61, 61, 61, 61, 61, 61, 61, 41, 37, 26, 22, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:43,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-03 14:34:43,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:43,790 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:43,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 885174377, now seen corresponding path program 12 times [2025-03-03 14:34:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515479871] [2025-03-03 14:34:43,791 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:43,817 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1713 statements into 108 equivalence classes. [2025-03-03 14:34:43,852 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) and asserted 404 of 1713 statements. [2025-03-03 14:34:43,853 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2025-03-03 14:34:43,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 88109 backedges. 1253 proven. 4148 refuted. 0 times theorem prover too weak. 82708 trivial. 0 not checked. [2025-03-03 14:34:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:44,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515479871] [2025-03-03 14:34:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515479871] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:44,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676741863] [2025-03-03 14:34:44,082 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-03 14:34:44,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:44,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:44,084 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 14:34:44,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 14:34:44,332 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1713 statements into 108 equivalence classes. [2025-03-03 14:34:44,407 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) and asserted 404 of 1713 statements. [2025-03-03 14:34:44,407 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2025-03-03 14:34:44,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:44,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:34:44,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 88109 backedges. 1253 proven. 4148 refuted. 0 times theorem prover too weak. 82708 trivial. 0 not checked. [2025-03-03 14:34:44,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 88109 backedges. 1255 proven. 4181 refuted. 0 times theorem prover too weak. 82673 trivial. 0 not checked. [2025-03-03 14:34:48,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676741863] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:48,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:48,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 22 [2025-03-03 14:34:48,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764444774] [2025-03-03 14:34:48,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:48,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-03 14:34:48,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:48,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-03 14:34:48,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2025-03-03 14:34:48,702 INFO L87 Difference]: Start difference. First operand 243 states and 387 transitions. Second operand has 22 states, 20 states have (on average 3.8) internal successors, (76), 22 states have internal predecessors, (76), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 17 states have call successors, (28) [2025-03-03 14:34:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:48,860 INFO L93 Difference]: Finished difference Result 271 states and 472 transitions. [2025-03-03 14:34:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-03 14:34:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.8) internal successors, (76), 22 states have internal predecessors, (76), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 17 states have call successors, (28) Word has length 1713 [2025-03-03 14:34:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:48,864 INFO L225 Difference]: With dead ends: 271 [2025-03-03 14:34:48,864 INFO L226 Difference]: Without dead ends: 267 [2025-03-03 14:34:48,865 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3450 GetRequests, 3415 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2025-03-03 14:34:48,866 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:48,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 224 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2025-03-03 14:34:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 243. [2025-03-03 14:34:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 170 states have (on average 1.035294117647059) internal successors, (176), 165 states have internal predecessors, (176), 47 states have call successors, (47), 33 states have call predecessors, (47), 25 states have return successors, (164), 44 states have call predecessors, (164), 47 states have call successors, (164) [2025-03-03 14:34:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 387 transitions. [2025-03-03 14:34:48,886 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 387 transitions. Word has length 1713 [2025-03-03 14:34:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:48,886 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 387 transitions. [2025-03-03 14:34:48,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.8) internal successors, (76), 22 states have internal predecessors, (76), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 17 states have call successors, (28) [2025-03-03 14:34:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 387 transitions. [2025-03-03 14:34:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1755 [2025-03-03 14:34:48,899 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:48,899 INFO L218 NwaCegarLoop]: trace histogram [129, 129, 128, 128, 105, 103, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 41, 39, 26, 23, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:48,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-03 14:34:49,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:49,104 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:49,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 309298674, now seen corresponding path program 13 times [2025-03-03 14:34:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:49,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827878393] [2025-03-03 14:34:49,105 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:49,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1754 statements into 1 equivalence classes. [2025-03-03 14:34:49,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1754 of 1754 statements. [2025-03-03 14:34:49,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:49,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 92377 backedges. 765 proven. 6158 refuted. 0 times theorem prover too weak. 85454 trivial. 0 not checked. [2025-03-03 14:34:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827878393] [2025-03-03 14:34:51,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827878393] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097300903] [2025-03-03 14:34:51,178 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-03 14:34:51,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:51,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:51,180 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 14:34:51,180 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 14:34:51,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1754 statements into 1 equivalence classes. [2025-03-03 14:34:51,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1754 of 1754 statements. [2025-03-03 14:34:51,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 14:34:51,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:51,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 3914 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 14:34:51,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 92377 backedges. 765 proven. 6158 refuted. 0 times theorem prover too weak. 85454 trivial. 0 not checked. [2025-03-03 14:34:51,823 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:34:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 92377 backedges. 765 proven. 6214 refuted. 0 times theorem prover too weak. 85398 trivial. 0 not checked. [2025-03-03 14:34:57,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097300903] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:34:57,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:34:57,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2025-03-03 14:34:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592643506] [2025-03-03 14:34:57,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:34:57,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 14:34:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:34:57,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 14:34:57,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-03-03 14:34:57,200 INFO L87 Difference]: Start difference. First operand 243 states and 387 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2025-03-03 14:34:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:34:57,410 INFO L93 Difference]: Finished difference Result 273 states and 491 transitions. [2025-03-03 14:34:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 14:34:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) Word has length 1754 [2025-03-03 14:34:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:34:57,414 INFO L225 Difference]: With dead ends: 273 [2025-03-03 14:34:57,415 INFO L226 Difference]: Without dead ends: 269 [2025-03-03 14:34:57,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3538 GetRequests, 3495 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2025-03-03 14:34:57,415 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 14:34:57,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 205 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 14:34:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2025-03-03 14:34:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 241. [2025-03-03 14:34:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 169 states have (on average 1.0355029585798816) internal successors, (175), 164 states have internal predecessors, (175), 46 states have call successors, (46), 33 states have call predecessors, (46), 25 states have return successors, (159), 43 states have call predecessors, (159), 46 states have call successors, (159) [2025-03-03 14:34:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2025-03-03 14:34:57,432 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 1754 [2025-03-03 14:34:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:34:57,433 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2025-03-03 14:34:57,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2025-03-03 14:34:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2025-03-03 14:34:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1674 [2025-03-03 14:34:57,445 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:34:57,445 INFO L218 NwaCegarLoop]: trace histogram [123, 123, 122, 122, 100, 99, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 61, 39, 38, 24, 22, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:34:57,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-03 14:34:57,646 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 14:34:57,646 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:34:57,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:34:57,646 INFO L85 PathProgramCache]: Analyzing trace with hash 685248301, now seen corresponding path program 14 times [2025-03-03 14:34:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:34:57,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490350092] [2025-03-03 14:34:57,647 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:57,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:34:57,699 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1673 statements into 2 equivalence classes. [2025-03-03 14:34:57,817 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1673 of 1673 statements. [2025-03-03 14:34:57,817 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:57,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 83977 backedges. 1035 proven. 4897 refuted. 0 times theorem prover too weak. 78045 trivial. 0 not checked. [2025-03-03 14:34:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:34:59,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490350092] [2025-03-03 14:34:59,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490350092] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:34:59,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906510138] [2025-03-03 14:34:59,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 14:34:59,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:34:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:34:59,314 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 14:34:59,314 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 14:34:59,604 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1673 statements into 2 equivalence classes. [2025-03-03 14:34:59,860 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1673 of 1673 statements. [2025-03-03 14:34:59,860 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 14:34:59,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:34:59,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 3734 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-03 14:34:59,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:34:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 83977 backedges. 909 proven. 6335 refuted. 0 times theorem prover too weak. 76733 trivial. 0 not checked. [2025-03-03 14:34:59,999 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 83977 backedges. 909 proven. 6405 refuted. 0 times theorem prover too weak. 76663 trivial. 0 not checked. [2025-03-03 14:35:06,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906510138] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:06,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:06,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 34 [2025-03-03 14:35:06,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271266983] [2025-03-03 14:35:06,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:06,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-03 14:35:06,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:06,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-03 14:35:06,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2025-03-03 14:35:06,233 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2025-03-03 14:35:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:06,559 INFO L93 Difference]: Finished difference Result 288 states and 556 transitions. [2025-03-03 14:35:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 14:35:06,562 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) Word has length 1673 [2025-03-03 14:35:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:06,566 INFO L225 Difference]: With dead ends: 288 [2025-03-03 14:35:06,566 INFO L226 Difference]: Without dead ends: 284 [2025-03-03 14:35:06,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3381 GetRequests, 3322 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2025-03-03 14:35:06,567 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:06,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 291 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2025-03-03 14:35:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 263. [2025-03-03 14:35:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 182 states have (on average 1.032967032967033) internal successors, (188), 177 states have internal predecessors, (188), 51 states have call successors, (51), 33 states have call predecessors, (51), 29 states have return successors, (224), 52 states have call predecessors, (224), 51 states have call successors, (224) [2025-03-03 14:35:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 463 transitions. [2025-03-03 14:35:06,586 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 463 transitions. Word has length 1673 [2025-03-03 14:35:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:06,587 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 463 transitions. [2025-03-03 14:35:06,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.46875) internal successors, (111), 34 states have internal predecessors, (111), 30 states have call successors, (34), 1 states have call predecessors, (34), 18 states have return successors, (49), 19 states have call predecessors, (49), 30 states have call successors, (49) [2025-03-03 14:35:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 463 transitions. [2025-03-03 14:35:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4533 [2025-03-03 14:35:06,657 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:06,657 INFO L218 NwaCegarLoop]: trace histogram [334, 334, 331, 331, 270, 268, 167, 167, 167, 167, 167, 167, 167, 165, 165, 165, 165, 165, 165, 165, 105, 101, 64, 63, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:06,668 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 14:35:06,862 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 14:35:06,862 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:06,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2103514833, now seen corresponding path program 15 times [2025-03-03 14:35:06,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:06,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338014117] [2025-03-03 14:35:06,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:06,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:06,955 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4532 statements into 278 equivalence classes. [2025-03-03 14:35:07,002 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) and asserted 621 of 4532 statements. [2025-03-03 14:35:07,002 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2025-03-03 14:35:07,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 622561 backedges. 16155 proven. 583 refuted. 0 times theorem prover too weak. 605823 trivial. 0 not checked. [2025-03-03 14:35:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 14:35:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338014117] [2025-03-03 14:35:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338014117] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 14:35:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120432489] [2025-03-03 14:35:07,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 14:35:07,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 14:35:07,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 14:35:07,440 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 14:35:07,441 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 14:35:07,912 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 4532 statements into 278 equivalence classes. [2025-03-03 14:35:08,026 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) and asserted 621 of 4532 statements. [2025-03-03 14:35:08,027 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2025-03-03 14:35:08,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 14:35:08,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 14:35:08,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 14:35:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 622561 backedges. 16149 proven. 586 refuted. 0 times theorem prover too weak. 605826 trivial. 0 not checked. [2025-03-03 14:35:08,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 14:35:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 622561 backedges. 16149 proven. 599 refuted. 0 times theorem prover too weak. 605813 trivial. 0 not checked. [2025-03-03 14:35:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120432489] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 14:35:18,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 14:35:18,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2025-03-03 14:35:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377977659] [2025-03-03 14:35:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 14:35:18,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 14:35:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 14:35:18,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 14:35:18,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2025-03-03 14:35:18,273 INFO L87 Difference]: Start difference. First operand 263 states and 463 transitions. Second operand has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 12 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (32), 19 states have call predecessors, (32), 12 states have call successors, (32) [2025-03-03 14:35:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 14:35:18,659 INFO L93 Difference]: Finished difference Result 661 states and 1353 transitions. [2025-03-03 14:35:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-03 14:35:18,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 12 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (32), 19 states have call predecessors, (32), 12 states have call successors, (32) Word has length 4532 [2025-03-03 14:35:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 14:35:18,663 INFO L225 Difference]: With dead ends: 661 [2025-03-03 14:35:18,663 INFO L226 Difference]: Without dead ends: 331 [2025-03-03 14:35:18,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9100 GetRequests, 9048 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1639, Unknown=0, NotChecked=0, Total=1980 [2025-03-03 14:35:18,666 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 66 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 14:35:18,666 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 335 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 14:35:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2025-03-03 14:35:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 269. [2025-03-03 14:35:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 186 states have (on average 1.032258064516129) internal successors, (192), 181 states have internal predecessors, (192), 51 states have call successors, (51), 33 states have call predecessors, (51), 31 states have return successors, (232), 54 states have call predecessors, (232), 51 states have call successors, (232) [2025-03-03 14:35:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 475 transitions. [2025-03-03 14:35:18,685 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 475 transitions. Word has length 4532 [2025-03-03 14:35:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 14:35:18,686 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 475 transitions. [2025-03-03 14:35:18,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 27 states have internal predecessors, (95), 12 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (32), 19 states have call predecessors, (32), 12 states have call successors, (32) [2025-03-03 14:35:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 475 transitions. [2025-03-03 14:35:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5036 [2025-03-03 14:35:18,771 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 14:35:18,772 INFO L218 NwaCegarLoop]: trace histogram [378, 378, 361, 361, 301, 296, 189, 189, 189, 189, 189, 189, 189, 180, 180, 180, 180, 180, 180, 180, 116, 112, 82, 60, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 14:35:18,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 14:35:18,972 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 14:35:18,972 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 14:35:18,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 14:35:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash 685118141, now seen corresponding path program 16 times [2025-03-03 14:35:18,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 14:35:18,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792805104] [2025-03-03 14:35:18,973 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-03 14:35:18,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 14:35:19,036 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 5035 statements into 2 equivalence classes. [2025-03-03 14:35:19,818 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 4293 of 5035 statements. [2025-03-03 14:35:19,818 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-03 14:35:19,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat