./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.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 e9f62e9366253d4fa7ecb8459a59d71535ca8498509abd809bca70a443281519 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 05:44:17,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 05:44:17,277 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 05:44:17,281 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 05:44:17,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 05:44:17,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 05:44:17,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 05:44:17,306 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 05:44:17,306 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 05:44:17,307 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 05:44:17,307 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 05:44:17,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 05:44:17,308 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 05:44:17,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 05:44:17,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 05:44:17,309 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 05:44:17,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 05:44:17,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:17,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 05:44:17,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 05:44:17,310 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 05:44:17,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 05:44:17,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 05:44:17,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 05:44:17,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 05:44:17,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 05:44:17,311 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 05:44:17,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 05:44:17,311 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 -> e9f62e9366253d4fa7ecb8459a59d71535ca8498509abd809bca70a443281519 [2025-03-08 05:44:17,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 05:44:17,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 05:44:17,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 05:44:17,530 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 05:44:17,530 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 05:44:17,531 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c [2025-03-08 05:44:18,605 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fa913e2/4fa6fb21a42f4b53970a65f6fb3f0f49/FLAGaf580a9f6 [2025-03-08 05:44:18,797 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 05:44:18,798 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c [2025-03-08 05:44:18,810 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fa913e2/4fa6fb21a42f4b53970a65f6fb3f0f49/FLAGaf580a9f6 [2025-03-08 05:44:19,163 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78fa913e2/4fa6fb21a42f4b53970a65f6fb3f0f49 [2025-03-08 05:44:19,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 05:44:19,166 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 05:44:19,167 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:19,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 05:44:19,170 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 05:44:19,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500e3421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19, skipping insertion in model container [2025-03-08 05:44:19,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,182 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 05:44:19,282 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_20-2.c[951,964] [2025-03-08 05:44:19,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:19,292 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 05:44:19,304 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_20-2.c[951,964] [2025-03-08 05:44:19,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 05:44:19,314 INFO L204 MainTranslator]: Completed translation [2025-03-08 05:44:19,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19 WrapperNode [2025-03-08 05:44:19,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 05:44:19,316 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:19,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 05:44:19,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 05:44:19,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,335 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2025-03-08 05:44:19,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 05:44:19,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 05:44:19,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 05:44:19,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 05:44:19,341 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,354 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-08 05:44:19,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,354 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,355 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 05:44:19,358 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 05:44:19,358 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 05:44:19,358 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 05:44:19,359 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (1/1) ... [2025-03-08 05:44:19,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 05:44:19,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:19,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 05:44:19,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 05:44:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 05:44:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 05:44:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2025-03-08 05:44:19,401 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2025-03-08 05:44:19,401 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2025-03-08 05:44:19,401 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2025-03-08 05:44:19,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 05:44:19,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 05:44:19,444 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 05:44:19,446 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 05:44:19,510 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc #t~ret6;havoc #t~ret7; [2025-03-08 05:44:19,520 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L15: havoc #t~ret4;havoc #t~ret5; [2025-03-08 05:44:19,527 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-03-08 05:44:19,529 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 05:44:19,534 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 05:44:19,535 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 05:44:19,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:19 BoogieIcfgContainer [2025-03-08 05:44:19,535 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 05:44:19,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 05:44:19,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 05:44:19,539 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 05:44:19,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:44:19" (1/3) ... [2025-03-08 05:44:19,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:19, skipping insertion in model container [2025-03-08 05:44:19,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:44:19" (2/3) ... [2025-03-08 05:44:19,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:44:19, skipping insertion in model container [2025-03-08 05:44:19,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:44:19" (3/3) ... [2025-03-08 05:44:19,541 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-2.c [2025-03-08 05:44:19,550 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 05:44:19,551 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_20-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-03-08 05:44:19,581 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 05:44:19,594 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;@ae070ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 05:44:19,594 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 05:44:19,598 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) [2025-03-08 05:44:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-08 05:44:19,601 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:19,602 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:19,602 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:19,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash -402987893, now seen corresponding path program 1 times [2025-03-08 05:44:19,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:19,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717865017] [2025-03-08 05:44:19,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:19,656 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-08 05:44:19,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-08 05:44:19,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:19,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:19,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717865017] [2025-03-08 05:44:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717865017] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:19,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:19,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:19,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131907780] [2025-03-08 05:44:19,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:19,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:19,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:19,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:19,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:19,769 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:19,831 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2025-03-08 05:44:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2025-03-08 05:44:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:19,837 INFO L225 Difference]: With dead ends: 41 [2025-03-08 05:44:19,837 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:19,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:19,842 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:19,845 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:19,867 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) [2025-03-08 05:44:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:19,872 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2025-03-08 05:44:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:19,873 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:19,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-08 05:44:19,875 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:19,875 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:19,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 05:44:19,875 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:19,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1356301235, now seen corresponding path program 1 times [2025-03-08 05:44:19,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:19,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376103878] [2025-03-08 05:44:19,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:19,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:19,883 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-08 05:44:19,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-08 05:44:19,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:19,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 05:44:19,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:19,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376103878] [2025-03-08 05:44:19,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376103878] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 05:44:19,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 05:44:19,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 05:44:19,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220683121] [2025-03-08 05:44:19,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 05:44:19,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 05:44:19,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:19,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 05:44:19,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:19,938 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:19,982 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-08 05:44:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 05:44:19,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-03-08 05:44:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:19,984 INFO L225 Difference]: With dead ends: 33 [2025-03-08 05:44:19,985 INFO L226 Difference]: Without dead ends: 29 [2025-03-08 05:44:19,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 05:44:19,986 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:19,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:44:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-08 05:44:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-08 05:44:19,989 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) [2025-03-08 05:44:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2025-03-08 05:44:19,990 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2025-03-08 05:44:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:19,990 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2025-03-08 05:44:19,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-08 05:44:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2025-03-08 05:44:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-08 05:44:19,991 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:19,991 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:19,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 05:44:19,992 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:19,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1190707769, now seen corresponding path program 1 times [2025-03-08 05:44:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:19,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10769740] [2025-03-08 05:44:19,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:19,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:20,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:20,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:20,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:20,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10769740] [2025-03-08 05:44:20,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10769740] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165428600] [2025-03-08 05:44:20,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:20,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:20,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 05:44:20,116 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 05:44:20,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 05:44:20,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:20,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:20,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:20,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:20,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:20,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165428600] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:20,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:20,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2025-03-08 05:44:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785412646] [2025-03-08 05:44:20,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:20,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 05:44:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:20,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 05:44:20,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-08 05:44:20,381 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) [2025-03-08 05:44:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:20,508 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2025-03-08 05:44:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:44:20,508 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 [2025-03-08 05:44:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:20,510 INFO L225 Difference]: With dead ends: 55 [2025-03-08 05:44:20,510 INFO L226 Difference]: Without dead ends: 31 [2025-03-08 05:44:20,511 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 [2025-03-08 05:44:20,512 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:20,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-08 05:44:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2025-03-08 05:44:20,519 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) [2025-03-08 05:44:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2025-03-08 05:44:20,520 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2025-03-08 05:44:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:20,520 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2025-03-08 05:44:20,520 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) [2025-03-08 05:44:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2025-03-08 05:44:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-08 05:44:20,528 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:20,528 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] [2025-03-08 05:44:20,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 05:44:20,728 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 [2025-03-08 05:44:20,728 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:20,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1027112458, now seen corresponding path program 1 times [2025-03-08 05:44:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:20,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751349800] [2025-03-08 05:44:20,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:20,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:20,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:20,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:20,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:20,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:20,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:20,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751349800] [2025-03-08 05:44:20,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751349800] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:20,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738799232] [2025-03-08 05:44:20,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:20,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:20,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:20,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 05:44:20,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 05:44:20,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 05:44:20,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:20,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:20,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:20,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:20,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 05:44:21,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738799232] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:21,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:21,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-08 05:44:21,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61209604] [2025-03-08 05:44:21,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:21,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 05:44:21,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:21,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 05:44:21,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-08 05:44:21,032 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) [2025-03-08 05:44:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:21,121 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-03-08 05:44:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 05:44:21,121 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 [2025-03-08 05:44:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:21,122 INFO L225 Difference]: With dead ends: 40 [2025-03-08 05:44:21,122 INFO L226 Difference]: Without dead ends: 36 [2025-03-08 05:44:21,123 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 [2025-03-08 05:44:21,123 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:21,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-08 05:44:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2025-03-08 05:44:21,127 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) [2025-03-08 05:44:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2025-03-08 05:44:21,128 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2025-03-08 05:44:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:21,128 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2025-03-08 05:44:21,128 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) [2025-03-08 05:44:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2025-03-08 05:44:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-08 05:44:21,129 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:21,129 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] [2025-03-08 05:44:21,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 05:44:21,334 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 [2025-03-08 05:44:21,334 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:21,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1200844378, now seen corresponding path program 1 times [2025-03-08 05:44:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:21,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449823153] [2025-03-08 05:44:21,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:21,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:21,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:21,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:21,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449823153] [2025-03-08 05:44:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449823153] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546321273] [2025-03-08 05:44:21,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:21,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:21,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:21,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:21,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 05:44:21,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 05:44:21,446 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 05:44:21,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:21,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:21,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:21,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 05:44:21,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:44:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546321273] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:21,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:21,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2025-03-08 05:44:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756789837] [2025-03-08 05:44:21,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:21,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:44:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:21,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:44:21,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:44:21,783 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) [2025-03-08 05:44:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:21,896 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2025-03-08 05:44:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 05:44:21,897 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 [2025-03-08 05:44:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:21,898 INFO L225 Difference]: With dead ends: 69 [2025-03-08 05:44:21,899 INFO L226 Difference]: Without dead ends: 38 [2025-03-08 05:44:21,900 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 [2025-03-08 05:44:21,900 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:21,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-03-08 05:44:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2025-03-08 05:44:21,906 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) [2025-03-08 05:44:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2025-03-08 05:44:21,907 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2025-03-08 05:44:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:21,907 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2025-03-08 05:44:21,907 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) [2025-03-08 05:44:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2025-03-08 05:44:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-03-08 05:44:21,908 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:21,908 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] [2025-03-08 05:44:21,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 05:44:22,108 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 [2025-03-08 05:44:22,108 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:22,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash -255039370, now seen corresponding path program 1 times [2025-03-08 05:44:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:22,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234872318] [2025-03-08 05:44:22,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:22,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:44:22,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:44:22,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:22,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-08 05:44:22,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:22,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234872318] [2025-03-08 05:44:22,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234872318] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:22,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103758449] [2025-03-08 05:44:22,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:22,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:22,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:22,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:22,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 05:44:22,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 05:44:22,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 05:44:22,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:22,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:22,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:22,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 05:44:22,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 05:44:22,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103758449] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:22,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:22,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2025-03-08 05:44:22,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066936926] [2025-03-08 05:44:22,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:22,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 05:44:22,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:22,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 05:44:22,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-08 05:44:22,573 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) [2025-03-08 05:44:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:22,865 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2025-03-08 05:44:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 05:44:22,866 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 [2025-03-08 05:44:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:22,867 INFO L225 Difference]: With dead ends: 101 [2025-03-08 05:44:22,867 INFO L226 Difference]: Without dead ends: 68 [2025-03-08 05:44:22,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:44:22,868 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:22,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-08 05:44:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2025-03-08 05:44:22,878 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) [2025-03-08 05:44:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2025-03-08 05:44:22,879 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2025-03-08 05:44:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:22,881 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2025-03-08 05:44:22,882 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) [2025-03-08 05:44:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2025-03-08 05:44:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-08 05:44:22,883 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:22,883 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] [2025-03-08 05:44:22,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:23,083 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 [2025-03-08 05:44:23,084 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:23,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1862824006, now seen corresponding path program 1 times [2025-03-08 05:44:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019090560] [2025-03-08 05:44:23,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:23,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:23,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:44:23,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:44:23,095 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:23,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-08 05:44:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019090560] [2025-03-08 05:44:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019090560] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315327454] [2025-03-08 05:44:23,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:23,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:23,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 05:44:23,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-08 05:44:23,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-08 05:44:23,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:23,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:23,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 05:44:23,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-08 05:44:23,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-08 05:44:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315327454] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:23,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2025-03-08 05:44:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79234121] [2025-03-08 05:44:23,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:23,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 05:44:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:23,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 05:44:23,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2025-03-08 05:44:23,650 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) [2025-03-08 05:44:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:23,814 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2025-03-08 05:44:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:23,814 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 [2025-03-08 05:44:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:23,816 INFO L225 Difference]: With dead ends: 102 [2025-03-08 05:44:23,817 INFO L226 Difference]: Without dead ends: 98 [2025-03-08 05:44:23,817 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 [2025-03-08 05:44:23,818 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:23,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 164 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-08 05:44:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2025-03-08 05:44:23,836 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) [2025-03-08 05:44:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2025-03-08 05:44:23,838 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2025-03-08 05:44:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:23,838 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2025-03-08 05:44:23,838 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) [2025-03-08 05:44:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2025-03-08 05:44:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2025-03-08 05:44:23,840 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:23,840 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] [2025-03-08 05:44:23,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:24,041 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 [2025-03-08 05:44:24,041 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:24,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:24,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1757221303, now seen corresponding path program 1 times [2025-03-08 05:44:24,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:24,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059662983] [2025-03-08 05:44:24,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:24,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:24,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:44:24,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:44:24,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:24,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2025-03-08 05:44:24,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:24,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059662983] [2025-03-08 05:44:24,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059662983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:24,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380208918] [2025-03-08 05:44:24,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:24,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:24,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:24,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 05:44:24,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 107 statements into 1 equivalence classes. [2025-03-08 05:44:24,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 107 of 107 statements. [2025-03-08 05:44:24,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:24,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:24,253 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:44:24,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 119 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-08 05:44:24,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 17 proven. 129 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-03-08 05:44:25,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380208918] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:25,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:25,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2025-03-08 05:44:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414797036] [2025-03-08 05:44:25,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:25,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:25,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:25,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:25,059 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) [2025-03-08 05:44:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:25,555 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2025-03-08 05:44:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 05:44:25,555 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 [2025-03-08 05:44:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:25,557 INFO L225 Difference]: With dead ends: 177 [2025-03-08 05:44:25,557 INFO L226 Difference]: Without dead ends: 104 [2025-03-08 05:44:25,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 05:44:25,559 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 97 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:25,559 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 375 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:44:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-08 05:44:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2025-03-08 05:44:25,569 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) [2025-03-08 05:44:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2025-03-08 05:44:25,570 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 107 [2025-03-08 05:44:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:25,570 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2025-03-08 05:44:25,570 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) [2025-03-08 05:44:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2025-03-08 05:44:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2025-03-08 05:44:25,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:25,573 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:25,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:25,773 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 [2025-03-08 05:44:25,774 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:25,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:25,774 INFO L85 PathProgramCache]: Analyzing trace with hash 830576147, now seen corresponding path program 1 times [2025-03-08 05:44:25,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:25,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084008371] [2025-03-08 05:44:25,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:25,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:25,778 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-08 05:44:25,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-08 05:44:25,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:25,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 42 proven. 136 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2025-03-08 05:44:25,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084008371] [2025-03-08 05:44:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084008371] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:25,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81886542] [2025-03-08 05:44:25,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:25,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:25,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:25,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 05:44:25,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 133 statements into 1 equivalence classes. [2025-03-08 05:44:25,981 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 133 of 133 statements. [2025-03-08 05:44:25,981 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:25,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:25,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:25,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 179 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2025-03-08 05:44:26,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 29 proven. 195 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2025-03-08 05:44:26,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81886542] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:26,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:26,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2025-03-08 05:44:26,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57716614] [2025-03-08 05:44:26,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:26,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:26,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:26,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:26,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:26,986 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) [2025-03-08 05:44:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:27,234 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2025-03-08 05:44:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 05:44:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 133 [2025-03-08 05:44:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:27,236 INFO L225 Difference]: With dead ends: 132 [2025-03-08 05:44:27,236 INFO L226 Difference]: Without dead ends: 128 [2025-03-08 05:44:27,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 250 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:44:27,237 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:27,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 214 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-08 05:44:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2025-03-08 05:44:27,255 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) [2025-03-08 05:44:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2025-03-08 05:44:27,259 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 133 [2025-03-08 05:44:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:27,259 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2025-03-08 05:44:27,260 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) [2025-03-08 05:44:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2025-03-08 05:44:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2025-03-08 05:44:27,264 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:27,266 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 23, 23, 21, 20, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 9, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:27,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:27,466 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 [2025-03-08 05:44:27,467 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:27,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1043998597, now seen corresponding path program 2 times [2025-03-08 05:44:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915088425] [2025-03-08 05:44:27,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:27,478 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-08 05:44:27,512 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-08 05:44:27,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:27,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-08 05:44:27,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915088425] [2025-03-08 05:44:27,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915088425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893235669] [2025-03-08 05:44:27,845 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:27,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:27,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:27,847 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:27,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 05:44:27,907 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 339 statements into 2 equivalence classes. [2025-03-08 05:44:27,966 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 339 of 339 statements. [2025-03-08 05:44:27,967 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:27,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:27,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 05:44:27,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 2438 trivial. 0 not checked. [2025-03-08 05:44:28,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3244 backedges. 101 proven. 729 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2025-03-08 05:44:29,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893235669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:29,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:29,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 20 [2025-03-08 05:44:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958015915] [2025-03-08 05:44:29,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:29,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 05:44:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:29,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 05:44:29,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:44:29,604 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) [2025-03-08 05:44:29,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:29,767 INFO L93 Difference]: Finished difference Result 148 states and 283 transitions. [2025-03-08 05:44:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 05:44:29,768 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 339 [2025-03-08 05:44:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:29,771 INFO L225 Difference]: With dead ends: 148 [2025-03-08 05:44:29,771 INFO L226 Difference]: Without dead ends: 144 [2025-03-08 05:44:29,772 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 699 GetRequests, 668 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2025-03-08 05:44:29,772 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:29,773 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 199 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-03-08 05:44:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2025-03-08 05:44:29,794 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) [2025-03-08 05:44:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 180 transitions. [2025-03-08 05:44:29,796 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 180 transitions. Word has length 339 [2025-03-08 05:44:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:29,796 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 180 transitions. [2025-03-08 05:44:29,797 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) [2025-03-08 05:44:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 180 transitions. [2025-03-08 05:44:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-03-08 05:44:29,800 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:29,800 INFO L218 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:29,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:30,005 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 [2025-03-08 05:44:30,005 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:30,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1635968901, now seen corresponding path program 3 times [2025-03-08 05:44:30,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:30,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416070919] [2025-03-08 05:44:30,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:30,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 391 statements into 25 equivalence classes. [2025-03-08 05:44:30,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 391 statements. [2025-03-08 05:44:30,058 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:44:30,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 754 proven. 94 refuted. 0 times theorem prover too weak. 3500 trivial. 0 not checked. [2025-03-08 05:44:30,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:30,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416070919] [2025-03-08 05:44:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416070919] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:30,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652284309] [2025-03-08 05:44:30,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:30,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:30,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:30,237 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 05:44:30,315 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 391 statements into 25 equivalence classes. [2025-03-08 05:44:30,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) and asserted 153 of 391 statements. [2025-03-08 05:44:30,349 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2025-03-08 05:44:30,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:30,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 05:44:30,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 592 proven. 102 refuted. 0 times theorem prover too weak. 3654 trivial. 0 not checked. [2025-03-08 05:44:30,439 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 594 proven. 112 refuted. 0 times theorem prover too weak. 3642 trivial. 0 not checked. [2025-03-08 05:44:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652284309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:31,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:31,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 13] total 23 [2025-03-08 05:44:31,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349094337] [2025-03-08 05:44:31,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:31,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:31,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:31,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:31,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:31,531 INFO L87 Difference]: Start difference. First operand 113 states and 180 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) [2025-03-08 05:44:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:32,052 INFO L93 Difference]: Finished difference Result 332 states and 732 transitions. [2025-03-08 05:44:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 05:44:32,052 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), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) Word has length 391 [2025-03-08 05:44:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:32,056 INFO L225 Difference]: With dead ends: 332 [2025-03-08 05:44:32,056 INFO L226 Difference]: Without dead ends: 224 [2025-03-08 05:44:32,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 769 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2025-03-08 05:44:32,058 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:32,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 367 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 05:44:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-03-08 05:44:32,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 181. [2025-03-08 05:44:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 121 states have internal predecessors, (144), 35 states have call successors, (35), 15 states have call predecessors, (35), 26 states have return successors, (148), 44 states have call predecessors, (148), 35 states have call successors, (148) [2025-03-08 05:44:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 327 transitions. [2025-03-08 05:44:32,080 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 327 transitions. Word has length 391 [2025-03-08 05:44:32,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:32,080 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 327 transitions. [2025-03-08 05:44:32,080 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), 13 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (28), 16 states have call predecessors, (28), 13 states have call successors, (28) [2025-03-08 05:44:32,080 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 327 transitions. [2025-03-08 05:44:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2025-03-08 05:44:32,087 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:32,087 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 23, 23, 21, 19, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 11, 11, 11, 11, 10, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:32,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:32,288 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 [2025-03-08 05:44:32,288 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:32,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -453530286, now seen corresponding path program 4 times [2025-03-08 05:44:32,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:32,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891578817] [2025-03-08 05:44:32,288 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:32,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:32,299 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 362 statements into 2 equivalence classes. [2025-03-08 05:44:32,312 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 306 of 362 statements. [2025-03-08 05:44:32,312 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:32,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3773 backedges. 151 proven. 497 refuted. 0 times theorem prover too weak. 3125 trivial. 0 not checked. [2025-03-08 05:44:32,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891578817] [2025-03-08 05:44:32,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891578817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661305078] [2025-03-08 05:44:32,453 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:44:32,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:32,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:32,454 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:32,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 05:44:32,543 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 362 statements into 2 equivalence classes. [2025-03-08 05:44:32,587 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 306 of 362 statements. [2025-03-08 05:44:32,587 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:44:32,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:32,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:44:32,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3773 backedges. 902 proven. 6 refuted. 0 times theorem prover too weak. 2865 trivial. 0 not checked. [2025-03-08 05:44:32,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3773 backedges. 157 proven. 592 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2025-03-08 05:44:33,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661305078] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:33,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:33,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-03-08 05:44:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761810130] [2025-03-08 05:44:33,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:33,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 05:44:33,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:33,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 05:44:33,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-08 05:44:33,484 INFO L87 Difference]: Start difference. First operand 181 states and 327 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-08 05:44:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:33,620 INFO L93 Difference]: Finished difference Result 354 states and 690 transitions. [2025-03-08 05:44:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:44:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 362 [2025-03-08 05:44:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:33,622 INFO L225 Difference]: With dead ends: 354 [2025-03-08 05:44:33,622 INFO L226 Difference]: Without dead ends: 178 [2025-03-08 05:44:33,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 714 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-08 05:44:33,624 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:33,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 203 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2025-03-08 05:44:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2025-03-08 05:44:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 113 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (115), 38 states have call predecessors, (115), 33 states have call successors, (115) [2025-03-08 05:44:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 289 transitions. [2025-03-08 05:44:33,638 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 289 transitions. Word has length 362 [2025-03-08 05:44:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:33,639 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 289 transitions. [2025-03-08 05:44:33,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2025-03-08 05:44:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 289 transitions. [2025-03-08 05:44:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2025-03-08 05:44:33,641 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:33,641 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 23, 23, 23, 21, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 11, 11, 11, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:33,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 05:44:33,842 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 [2025-03-08 05:44:33,842 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:33,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1366443918, now seen corresponding path program 1 times [2025-03-08 05:44:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:33,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649752467] [2025-03-08 05:44:33,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:33,850 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 366 statements into 1 equivalence classes. [2025-03-08 05:44:33,879 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 366 of 366 statements. [2025-03-08 05:44:33,879 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:33,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3855 backedges. 148 proven. 629 refuted. 0 times theorem prover too weak. 3078 trivial. 0 not checked. [2025-03-08 05:44:34,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649752467] [2025-03-08 05:44:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649752467] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848631181] [2025-03-08 05:44:34,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 05:44:34,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:34,131 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:34,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 05:44:34,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 366 statements into 1 equivalence classes. [2025-03-08 05:44:34,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 366 of 366 statements. [2025-03-08 05:44:34,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:34,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:34,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:44:34,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3855 backedges. 114 proven. 893 refuted. 0 times theorem prover too weak. 2848 trivial. 0 not checked. [2025-03-08 05:44:34,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3855 backedges. 114 proven. 926 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2025-03-08 05:44:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848631181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:36,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:36,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 27 [2025-03-08 05:44:36,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187375739] [2025-03-08 05:44:36,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:36,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:44:36,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:36,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:44:36,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:44:36,356 INFO L87 Difference]: Start difference. First operand 171 states and 289 transitions. Second operand has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) [2025-03-08 05:44:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:36,627 INFO L93 Difference]: Finished difference Result 266 states and 610 transitions. [2025-03-08 05:44:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 05:44:36,627 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) Word has length 366 [2025-03-08 05:44:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:36,631 INFO L225 Difference]: With dead ends: 266 [2025-03-08 05:44:36,631 INFO L226 Difference]: Without dead ends: 258 [2025-03-08 05:44:36,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 712 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2025-03-08 05:44:36,633 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:36,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-03-08 05:44:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 208. [2025-03-08 05:44:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 138 states have (on average 1.181159420289855) internal successors, (163), 135 states have internal predecessors, (163), 41 states have call successors, (41), 19 states have call predecessors, (41), 28 states have return successors, (204), 53 states have call predecessors, (204), 41 states have call successors, (204) [2025-03-08 05:44:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 408 transitions. [2025-03-08 05:44:36,654 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 408 transitions. Word has length 366 [2025-03-08 05:44:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:36,654 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 408 transitions. [2025-03-08 05:44:36,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.56) internal successors, (89), 27 states have internal predecessors, (89), 23 states have call successors, (27), 1 states have call predecessors, (27), 14 states have return successors, (38), 15 states have call predecessors, (38), 23 states have call successors, (38) [2025-03-08 05:44:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 408 transitions. [2025-03-08 05:44:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2025-03-08 05:44:36,662 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:36,663 INFO L218 NwaCegarLoop]: trace histogram [96, 96, 85, 85, 77, 69, 48, 48, 48, 48, 48, 48, 48, 42, 42, 42, 42, 42, 42, 42, 35, 21, 19, 16, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:36,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 05:44:36,867 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 [2025-03-08 05:44:36,867 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:36,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1628412642, now seen corresponding path program 5 times [2025-03-08 05:44:36,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:36,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677311673] [2025-03-08 05:44:36,871 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:36,894 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1236 statements into 77 equivalence classes. [2025-03-08 05:44:36,909 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 147 of 1236 statements. [2025-03-08 05:44:36,910 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-08 05:44:36,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 45748 backedges. 803 proven. 2899 refuted. 0 times theorem prover too weak. 42046 trivial. 0 not checked. [2025-03-08 05:44:37,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677311673] [2025-03-08 05:44:37,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677311673] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:37,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302064178] [2025-03-08 05:44:37,075 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:44:37,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:37,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:37,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:37,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 05:44:37,225 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1236 statements into 77 equivalence classes. [2025-03-08 05:44:37,259 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 147 of 1236 statements. [2025-03-08 05:44:37,259 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-08 05:44:37,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:37,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:37,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45748 backedges. 12955 proven. 65 refuted. 0 times theorem prover too weak. 32728 trivial. 0 not checked. [2025-03-08 05:44:37,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 45748 backedges. 834 proven. 3175 refuted. 0 times theorem prover too weak. 41739 trivial. 0 not checked. [2025-03-08 05:44:40,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302064178] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:40,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:40,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 22 [2025-03-08 05:44:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572107852] [2025-03-08 05:44:40,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:40,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 05:44:40,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:40,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 05:44:40,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2025-03-08 05:44:40,368 INFO L87 Difference]: Start difference. First operand 208 states and 408 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) [2025-03-08 05:44:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:40,587 INFO L93 Difference]: Finished difference Result 435 states and 969 transitions. [2025-03-08 05:44:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:44:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) Word has length 1236 [2025-03-08 05:44:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:40,590 INFO L225 Difference]: With dead ends: 435 [2025-03-08 05:44:40,590 INFO L226 Difference]: Without dead ends: 234 [2025-03-08 05:44:40,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2494 GetRequests, 2458 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2025-03-08 05:44:40,592 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:40,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 309 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2025-03-08 05:44:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 225. [2025-03-08 05:44:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 152 states have (on average 1.118421052631579) internal successors, (170), 147 states have internal predecessors, (170), 42 states have call successors, (42), 22 states have call predecessors, (42), 30 states have return successors, (204), 55 states have call predecessors, (204), 42 states have call successors, (204) [2025-03-08 05:44:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 416 transitions. [2025-03-08 05:44:40,607 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 416 transitions. Word has length 1236 [2025-03-08 05:44:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:40,607 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 416 transitions. [2025-03-08 05:44:40,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 14 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (31), 10 states have call predecessors, (31), 14 states have call successors, (31) [2025-03-08 05:44:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 416 transitions. [2025-03-08 05:44:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2025-03-08 05:44:40,614 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:40,614 INFO L218 NwaCegarLoop]: trace histogram [80, 80, 67, 67, 61, 60, 40, 40, 40, 40, 40, 40, 40, 33, 33, 33, 33, 33, 33, 33, 27, 21, 20, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:40,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:40,819 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 [2025-03-08 05:44:40,819 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:40,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 204988545, now seen corresponding path program 6 times [2025-03-08 05:44:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093937457] [2025-03-08 05:44:40,820 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:40,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:40,837 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1007 statements into 62 equivalence classes. [2025-03-08 05:44:40,858 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 200 of 1007 statements. [2025-03-08 05:44:40,859 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-08 05:44:40,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30316 backedges. 716 proven. 2339 refuted. 0 times theorem prover too weak. 27261 trivial. 0 not checked. [2025-03-08 05:44:41,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:41,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093937457] [2025-03-08 05:44:41,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093937457] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:41,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263561303] [2025-03-08 05:44:41,053 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:44:41,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:41,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:41,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:41,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 05:44:41,203 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1007 statements into 62 equivalence classes. [2025-03-08 05:44:41,245 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 200 of 1007 statements. [2025-03-08 05:44:41,245 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-08 05:44:41,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:41,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 05:44:41,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30316 backedges. 9699 proven. 61 refuted. 0 times theorem prover too weak. 20556 trivial. 0 not checked. [2025-03-08 05:44:41,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30316 backedges. 748 proven. 2589 refuted. 0 times theorem prover too weak. 26979 trivial. 0 not checked. [2025-03-08 05:44:43,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263561303] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:43,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:43,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 23 [2025-03-08 05:44:43,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375250299] [2025-03-08 05:44:43,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:43,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 05:44:43,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:43,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 05:44:43,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-03-08 05:44:43,719 INFO L87 Difference]: Start difference. First operand 225 states and 416 transitions. Second operand has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 17 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (30), 7 states have call predecessors, (30), 17 states have call successors, (30) [2025-03-08 05:44:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:43,998 INFO L93 Difference]: Finished difference Result 449 states and 957 transitions. [2025-03-08 05:44:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 05:44:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 17 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (30), 7 states have call predecessors, (30), 17 states have call successors, (30) Word has length 1007 [2025-03-08 05:44:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:44,002 INFO L225 Difference]: With dead ends: 449 [2025-03-08 05:44:44,002 INFO L226 Difference]: Without dead ends: 220 [2025-03-08 05:44:44,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2042 GetRequests, 1999 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 05:44:44,004 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:44,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 299 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-03-08 05:44:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 200. [2025-03-08 05:44:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 136 states have (on average 1.0955882352941178) internal successors, (149), 132 states have internal predecessors, (149), 37 states have call successors, (37), 21 states have call predecessors, (37), 26 states have return successors, (153), 46 states have call predecessors, (153), 37 states have call successors, (153) [2025-03-08 05:44:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 339 transitions. [2025-03-08 05:44:44,017 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 339 transitions. Word has length 1007 [2025-03-08 05:44:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:44,018 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 339 transitions. [2025-03-08 05:44:44,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.136363636363637) internal successors, (91), 23 states have internal predecessors, (91), 17 states have call successors, (26), 2 states have call predecessors, (26), 8 states have return successors, (30), 7 states have call predecessors, (30), 17 states have call successors, (30) [2025-03-08 05:44:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 339 transitions. [2025-03-08 05:44:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2025-03-08 05:44:44,023 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:44,024 INFO L218 NwaCegarLoop]: trace histogram [74, 74, 71, 71, 59, 59, 37, 37, 37, 37, 37, 37, 37, 35, 35, 35, 35, 35, 35, 35, 24, 22, 15, 12, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:44,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 05:44:44,228 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 [2025-03-08 05:44:44,228 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:44,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2145223048, now seen corresponding path program 7 times [2025-03-08 05:44:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710325051] [2025-03-08 05:44:44,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:44:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:44,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 992 statements into 1 equivalence classes. [2025-03-08 05:44:44,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 992 of 992 statements. [2025-03-08 05:44:44,353 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:44,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 29210 backedges. 397 proven. 3015 refuted. 0 times theorem prover too weak. 25798 trivial. 0 not checked. [2025-03-08 05:44:45,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:45,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710325051] [2025-03-08 05:44:45,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710325051] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:45,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738043826] [2025-03-08 05:44:45,125 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:44:45,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:45,140 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:45,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 05:44:45,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 992 statements into 1 equivalence classes. [2025-03-08 05:44:45,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 992 of 992 statements. [2025-03-08 05:44:45,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:44:45,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:45,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 2221 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 05:44:45,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 29210 backedges. 397 proven. 3015 refuted. 0 times theorem prover too weak. 25798 trivial. 0 not checked. [2025-03-08 05:44:45,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 29210 backedges. 397 proven. 3059 refuted. 0 times theorem prover too weak. 25754 trivial. 0 not checked. [2025-03-08 05:44:49,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738043826] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:49,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:49,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 21] total 24 [2025-03-08 05:44:49,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975588252] [2025-03-08 05:44:49,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:49,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-08 05:44:49,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:49,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-08 05:44:49,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2025-03-08 05:44:49,015 INFO L87 Difference]: Start difference. First operand 200 states and 339 transitions. Second operand has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2025-03-08 05:44:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:49,247 INFO L93 Difference]: Finished difference Result 271 states and 599 transitions. [2025-03-08 05:44:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 05:44:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) Word has length 992 [2025-03-08 05:44:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:49,251 INFO L225 Difference]: With dead ends: 271 [2025-03-08 05:44:49,251 INFO L226 Difference]: Without dead ends: 265 [2025-03-08 05:44:49,252 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2011 GetRequests, 1972 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2025-03-08 05:44:49,252 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:49,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 190 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:44:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2025-03-08 05:44:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 228. [2025-03-08 05:44:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 149 states have internal predecessors, (166), 42 states have call successors, (42), 21 states have call predecessors, (42), 32 states have return successors, (224), 57 states have call predecessors, (224), 42 states have call successors, (224) [2025-03-08 05:44:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 432 transitions. [2025-03-08 05:44:49,272 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 432 transitions. Word has length 992 [2025-03-08 05:44:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:49,272 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 432 transitions. [2025-03-08 05:44:49,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 24 states have internal predecessors, (81), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2025-03-08 05:44:49,273 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 432 transitions. [2025-03-08 05:44:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1254 [2025-03-08 05:44:49,280 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:49,281 INFO L218 NwaCegarLoop]: trace histogram [102, 102, 81, 81, 76, 75, 51, 51, 51, 51, 51, 51, 51, 40, 40, 40, 40, 40, 40, 40, 36, 26, 24, 6, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:49,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 05:44:49,481 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 [2025-03-08 05:44:49,482 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:49,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1956661751, now seen corresponding path program 8 times [2025-03-08 05:44:49,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:49,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031574187] [2025-03-08 05:44:49,483 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:49,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1253 statements into 2 equivalence classes. [2025-03-08 05:44:49,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1253 of 1253 statements. [2025-03-08 05:44:49,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:49,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 47409 backedges. 522 proven. 3397 refuted. 0 times theorem prover too weak. 43490 trivial. 0 not checked. [2025-03-08 05:44:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:50,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031574187] [2025-03-08 05:44:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031574187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:50,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433536403] [2025-03-08 05:44:50,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 05:44:50,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:50,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:50,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 05:44:50,766 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1253 statements into 2 equivalence classes. [2025-03-08 05:44:50,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1253 of 1253 statements. [2025-03-08 05:44:50,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 05:44:50,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:50,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 2800 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:44:50,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 47409 backedges. 478 proven. 4406 refuted. 0 times theorem prover too weak. 42525 trivial. 0 not checked. [2025-03-08 05:44:51,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:44:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 47409 backedges. 478 proven. 4462 refuted. 0 times theorem prover too weak. 42469 trivial. 0 not checked. [2025-03-08 05:44:55,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433536403] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:44:55,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:44:55,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 23] total 33 [2025-03-08 05:44:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919927951] [2025-03-08 05:44:55,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:44:55,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 05:44:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:44:55,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 05:44:55,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 05:44:55,814 INFO L87 Difference]: Start difference. First operand 228 states and 432 transitions. Second operand has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 18 states have return successors, (48), 19 states have call predecessors, (48), 29 states have call successors, (48) [2025-03-08 05:44:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:44:56,182 INFO L93 Difference]: Finished difference Result 317 states and 819 transitions. [2025-03-08 05:44:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 05:44:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 18 states have return successors, (48), 19 states have call predecessors, (48), 29 states have call successors, (48) Word has length 1253 [2025-03-08 05:44:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:44:56,187 INFO L225 Difference]: With dead ends: 317 [2025-03-08 05:44:56,187 INFO L226 Difference]: Without dead ends: 309 [2025-03-08 05:44:56,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2539 GetRequests, 2482 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1910, Unknown=0, NotChecked=0, Total=2352 [2025-03-08 05:44:56,189 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:44:56,189 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 304 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:44:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2025-03-08 05:44:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 271. [2025-03-08 05:44:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 179 states have (on average 1.0726256983240223) internal successors, (192), 175 states have internal predecessors, (192), 50 states have call successors, (50), 21 states have call predecessors, (50), 41 states have return successors, (386), 74 states have call predecessors, (386), 50 states have call successors, (386) [2025-03-08 05:44:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 628 transitions. [2025-03-08 05:44:56,213 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 628 transitions. Word has length 1253 [2025-03-08 05:44:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:44:56,214 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 628 transitions. [2025-03-08 05:44:56,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 18 states have return successors, (48), 19 states have call predecessors, (48), 29 states have call successors, (48) [2025-03-08 05:44:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 628 transitions. [2025-03-08 05:44:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2500 [2025-03-08 05:44:56,254 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:44:56,255 INFO L218 NwaCegarLoop]: trace histogram [186, 186, 177, 177, 169, 148, 93, 93, 93, 93, 93, 93, 93, 88, 88, 88, 88, 88, 88, 88, 76, 60, 38, 8, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:44:56,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 05:44:56,455 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 [2025-03-08 05:44:56,455 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:44:56,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:44:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1650627077, now seen corresponding path program 9 times [2025-03-08 05:44:56,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:44:56,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178294148] [2025-03-08 05:44:56,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:56,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:44:56,489 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2499 statements into 153 equivalence classes. [2025-03-08 05:44:56,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 44 of 2499 statements. [2025-03-08 05:44:56,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 05:44:56,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 188622 backedges. 4215 proven. 2 refuted. 0 times theorem prover too weak. 184405 trivial. 0 not checked. [2025-03-08 05:44:56,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:44:56,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178294148] [2025-03-08 05:44:56,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178294148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:44:56,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087448516] [2025-03-08 05:44:56,530 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 05:44:56,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:44:56,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:44:56,532 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:44:56,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 05:44:56,795 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 2499 statements into 153 equivalence classes. [2025-03-08 05:44:56,804 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 44 of 2499 statements. [2025-03-08 05:44:56,804 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-08 05:44:56,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:44:56,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 05:44:56,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:44:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 188622 backedges. 4213 proven. 4 refuted. 0 times theorem prover too weak. 184405 trivial. 0 not checked. [2025-03-08 05:44:56,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 188622 backedges. 4213 proven. 4 refuted. 0 times theorem prover too weak. 184405 trivial. 0 not checked. [2025-03-08 05:45:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087448516] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:01,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:01,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2025-03-08 05:45:01,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326880258] [2025-03-08 05:45:01,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:01,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 05:45:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:01,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 05:45:01,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-08 05:45:01,582 INFO L87 Difference]: Start difference. First operand 271 states and 628 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 05:45:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:01,662 INFO L93 Difference]: Finished difference Result 535 states and 1520 transitions. [2025-03-08 05:45:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 05:45:01,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 2499 [2025-03-08 05:45:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:01,667 INFO L225 Difference]: With dead ends: 535 [2025-03-08 05:45:01,667 INFO L226 Difference]: Without dead ends: 270 [2025-03-08 05:45:01,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5007 GetRequests, 4992 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:45:01,672 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:01,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 05:45:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-08 05:45:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2025-03-08 05:45:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 157 states have (on average 1.0828025477707006) internal successors, (170), 152 states have internal predecessors, (170), 44 states have call successors, (44), 22 states have call predecessors, (44), 32 states have return successors, (224), 59 states have call predecessors, (224), 44 states have call successors, (224) [2025-03-08 05:45:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 438 transitions. [2025-03-08 05:45:01,701 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 438 transitions. Word has length 2499 [2025-03-08 05:45:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:01,701 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 438 transitions. [2025-03-08 05:45:01,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2025-03-08 05:45:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 438 transitions. [2025-03-08 05:45:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2858 [2025-03-08 05:45:01,734 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:01,735 INFO L218 NwaCegarLoop]: trace histogram [216, 216, 203, 203, 170, 169, 108, 108, 108, 108, 108, 108, 108, 101, 101, 101, 101, 101, 101, 101, 69, 61, 46, 34, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:01,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:01,935 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 [2025-03-08 05:45:01,936 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:01,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:01,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1515358673, now seen corresponding path program 10 times [2025-03-08 05:45:01,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:01,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705176331] [2025-03-08 05:45:01,937 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:01,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:01,973 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2857 statements into 2 equivalence classes. [2025-03-08 05:45:02,379 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2435 of 2857 statements. [2025-03-08 05:45:02,380 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:02,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 246765 backedges. 1935 proven. 12561 refuted. 0 times theorem prover too weak. 232269 trivial. 0 not checked. [2025-03-08 05:45:06,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705176331] [2025-03-08 05:45:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705176331] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375100834] [2025-03-08 05:45:06,117 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 05:45:06,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:06,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:06,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:06,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 05:45:06,415 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2857 statements into 2 equivalence classes. [2025-03-08 05:45:06,769 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 2435 of 2857 statements. [2025-03-08 05:45:06,769 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 05:45:06,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:06,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 5082 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 05:45:06,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 246765 backedges. 36571 proven. 409 refuted. 0 times theorem prover too weak. 209785 trivial. 0 not checked. [2025-03-08 05:45:06,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 246765 backedges. 1957 proven. 13300 refuted. 0 times theorem prover too weak. 231508 trivial. 0 not checked. [2025-03-08 05:45:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375100834] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:14,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 30 [2025-03-08 05:45:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397770331] [2025-03-08 05:45:14,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:14,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-08 05:45:14,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:14,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-08 05:45:14,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2025-03-08 05:45:14,970 INFO L87 Difference]: Start difference. First operand 234 states and 438 transitions. Second operand has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) [2025-03-08 05:45:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:15,643 INFO L93 Difference]: Finished difference Result 511 states and 1184 transitions. [2025-03-08 05:45:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 05:45:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) Word has length 2857 [2025-03-08 05:45:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:15,648 INFO L225 Difference]: With dead ends: 511 [2025-03-08 05:45:15,648 INFO L226 Difference]: Without dead ends: 280 [2025-03-08 05:45:15,652 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5762 GetRequests, 5696 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=514, Invalid=2678, Unknown=0, NotChecked=0, Total=3192 [2025-03-08 05:45:15,653 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 85 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:15,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 702 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-08 05:45:15,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2025-03-08 05:45:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 247. [2025-03-08 05:45:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.0903614457831325) internal successors, (181), 161 states have internal predecessors, (181), 47 states have call successors, (47), 24 states have call predecessors, (47), 33 states have return successors, (240), 61 states have call predecessors, (240), 47 states have call successors, (240) [2025-03-08 05:45:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 468 transitions. [2025-03-08 05:45:15,687 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 468 transitions. Word has length 2857 [2025-03-08 05:45:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:15,687 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 468 transitions. [2025-03-08 05:45:15,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 24 states have call successors, (34), 2 states have call predecessors, (34), 12 states have return successors, (41), 12 states have call predecessors, (41), 24 states have call successors, (41) [2025-03-08 05:45:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 468 transitions. [2025-03-08 05:45:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3024 [2025-03-08 05:45:15,723 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:15,724 INFO L218 NwaCegarLoop]: trace histogram [232, 232, 211, 211, 182, 179, 116, 116, 116, 116, 116, 116, 116, 105, 105, 105, 105, 105, 105, 105, 77, 63, 50, 32, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:15,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:15,925 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 [2025-03-08 05:45:15,925 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:15,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1925532497, now seen corresponding path program 11 times [2025-03-08 05:45:15,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:15,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729646988] [2025-03-08 05:45:15,926 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:15,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:15,995 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 3023 statements into 192 equivalence classes. [2025-03-08 05:45:16,000 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 126 of 3023 statements. [2025-03-08 05:45:16,000 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-08 05:45:16,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 276726 backedges. 2329 proven. 10339 refuted. 0 times theorem prover too weak. 264058 trivial. 0 not checked. [2025-03-08 05:45:16,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:16,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729646988] [2025-03-08 05:45:16,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729646988] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:16,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192220003] [2025-03-08 05:45:16,154 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 05:45:16,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:16,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:16,156 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 05:45:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 05:45:16,493 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 3023 statements into 192 equivalence classes. [2025-03-08 05:45:16,516 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 126 of 3023 statements. [2025-03-08 05:45:16,516 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-08 05:45:16,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:16,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-08 05:45:16,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 276726 backedges. 54641 proven. 176 refuted. 0 times theorem prover too weak. 221909 trivial. 0 not checked. [2025-03-08 05:45:16,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 276726 backedges. 2368 proven. 11089 refuted. 0 times theorem prover too weak. 263269 trivial. 0 not checked. [2025-03-08 05:45:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192220003] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:24,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:24,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 19] total 27 [2025-03-08 05:45:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204323695] [2025-03-08 05:45:24,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:24,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 05:45:24,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:24,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 05:45:24,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2025-03-08 05:45:24,087 INFO L87 Difference]: Start difference. First operand 247 states and 468 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 21 states have call successors, (31), 2 states have call predecessors, (31), 10 states have return successors, (37), 10 states have call predecessors, (37), 21 states have call successors, (37) [2025-03-08 05:45:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:24,400 INFO L93 Difference]: Finished difference Result 508 states and 1118 transitions. [2025-03-08 05:45:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 05:45:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 21 states have call successors, (31), 2 states have call predecessors, (31), 10 states have return successors, (37), 10 states have call predecessors, (37), 21 states have call successors, (37) Word has length 3023 [2025-03-08 05:45:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:24,403 INFO L225 Difference]: With dead ends: 508 [2025-03-08 05:45:24,403 INFO L226 Difference]: Without dead ends: 268 [2025-03-08 05:45:24,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6078 GetRequests, 6029 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2025-03-08 05:45:24,406 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:24,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 444 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 05:45:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2025-03-08 05:45:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 255. [2025-03-08 05:45:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 172 states have (on average 1.0755813953488371) internal successors, (185), 167 states have internal predecessors, (185), 49 states have call successors, (49), 26 states have call predecessors, (49), 33 states have return successors, (232), 61 states have call predecessors, (232), 49 states have call successors, (232) [2025-03-08 05:45:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 466 transitions. [2025-03-08 05:45:24,424 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 466 transitions. Word has length 3023 [2025-03-08 05:45:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:24,425 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 466 transitions. [2025-03-08 05:45:24,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 21 states have call successors, (31), 2 states have call predecessors, (31), 10 states have return successors, (37), 10 states have call predecessors, (37), 21 states have call successors, (37) [2025-03-08 05:45:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 466 transitions. [2025-03-08 05:45:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3376 [2025-03-08 05:45:24,465 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:24,466 INFO L218 NwaCegarLoop]: trace histogram [251, 251, 244, 244, 202, 199, 125, 125, 125, 125, 125, 125, 125, 122, 122, 122, 122, 122, 122, 122, 80, 74, 49, 45, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:24,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:24,670 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 [2025-03-08 05:45:24,670 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:24,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1399910360, now seen corresponding path program 12 times [2025-03-08 05:45:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:24,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318001174] [2025-03-08 05:45:24,671 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:24,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:24,714 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 3375 statements into 201 equivalence classes. [2025-03-08 05:45:24,722 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 147 of 3375 statements. [2025-03-08 05:45:24,722 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 05:45:24,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 344610 backedges. 6575 proven. 7 refuted. 0 times theorem prover too weak. 338028 trivial. 0 not checked. [2025-03-08 05:45:24,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318001174] [2025-03-08 05:45:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318001174] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991079867] [2025-03-08 05:45:24,847 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 05:45:24,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:24,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:24,848 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) [2025-03-08 05:45:24,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 05:45:25,220 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 3375 statements into 201 equivalence classes. [2025-03-08 05:45:25,245 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 147 of 3375 statements. [2025-03-08 05:45:25,245 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-03-08 05:45:25,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:25,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 05:45:25,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 344610 backedges. 6575 proven. 7 refuted. 0 times theorem prover too weak. 338028 trivial. 0 not checked. [2025-03-08 05:45:25,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 05:45:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 344610 backedges. 6575 proven. 7 refuted. 0 times theorem prover too weak. 338028 trivial. 0 not checked. [2025-03-08 05:45:32,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991079867] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 05:45:32,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 05:45:32,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2025-03-08 05:45:32,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253461057] [2025-03-08 05:45:32,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 05:45:32,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 05:45:32,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 05:45:32,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 05:45:32,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2025-03-08 05:45:32,209 INFO L87 Difference]: Start difference. First operand 255 states and 466 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-08 05:45:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 05:45:32,316 INFO L93 Difference]: Finished difference Result 498 states and 1055 transitions. [2025-03-08 05:45:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 05:45:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 3375 [2025-03-08 05:45:32,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 05:45:32,321 INFO L225 Difference]: With dead ends: 498 [2025-03-08 05:45:32,321 INFO L226 Difference]: Without dead ends: 250 [2025-03-08 05:45:32,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6762 GetRequests, 6741 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2025-03-08 05:45:32,324 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 05:45:32,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 194 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 05:45:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-03-08 05:45:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2025-03-08 05:45:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 169 states have (on average 1.0769230769230769) internal successors, (182), 164 states have internal predecessors, (182), 48 states have call successors, (48), 26 states have call predecessors, (48), 32 states have return successors, (216), 59 states have call predecessors, (216), 48 states have call successors, (216) [2025-03-08 05:45:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 446 transitions. [2025-03-08 05:45:32,344 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 446 transitions. Word has length 3375 [2025-03-08 05:45:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 05:45:32,346 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 446 transitions. [2025-03-08 05:45:32,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2025-03-08 05:45:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 446 transitions. [2025-03-08 05:45:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3810 [2025-03-08 05:45:32,463 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 05:45:32,463 INFO L218 NwaCegarLoop]: trace histogram [285, 285, 274, 274, 231, 220, 142, 142, 142, 142, 142, 142, 142, 137, 137, 137, 137, 137, 137, 137, 94, 78, 54, 54, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 05:45:32,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 05:45:32,664 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 [2025-03-08 05:45:32,664 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 05:45:32,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 05:45:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1401588041, now seen corresponding path program 13 times [2025-03-08 05:45:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 05:45:32,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108027289] [2025-03-08 05:45:32,665 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 05:45:32,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3809 statements into 1 equivalence classes. [2025-03-08 05:45:33,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3809 of 3809 statements. [2025-03-08 05:45:33,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:33,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 439447 backedges. 1617 proven. 15355 refuted. 0 times theorem prover too weak. 422475 trivial. 0 not checked. [2025-03-08 05:45:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 05:45:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108027289] [2025-03-08 05:45:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108027289] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 05:45:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563878714] [2025-03-08 05:45:42,047 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 05:45:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 05:45:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 05:45:42,049 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) [2025-03-08 05:45:42,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 05:45:42,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3809 statements into 1 equivalence classes. [2025-03-08 05:45:42,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3809 of 3809 statements. [2025-03-08 05:45:42,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 05:45:42,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 05:45:43,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 8476 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 05:45:43,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 05:45:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 439447 backedges. 1617 proven. 15355 refuted. 0 times theorem prover too weak. 422475 trivial. 0 not checked. [2025-03-08 05:45:43,133 INFO L312 TraceCheckSpWp]: Computing backward predicates...