./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-03 09:44:15,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-03 09:44:15,634 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-03 09:44:15,638 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-03 09:44:15,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-03 09:44:15,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-03 09:44:15,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-03 09:44:15,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-03 09:44:15,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-03 09:44:15,660 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-03 09:44:15,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-03 09:44:15,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-03 09:44:15,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-03 09:44:15,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-03 09:44:15,661 INFO L153 SettingsManager]: * Use SBE=true [2025-03-03 09:44:15,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-03 09:44:15,661 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-03 09:44:15,661 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-03 09:44:15,662 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-03 09:44:15,662 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:44:15,663 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-03 09:44:15,663 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-03 09:44:15,664 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-03 09:44:15,664 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-03 09:44:15,664 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 -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2025-03-03 09:44:15,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-03 09:44:15,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-03 09:44:15,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-03 09:44:15,894 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-03 09:44:15,894 INFO L274 PluginConnector]: CDTParser initialized [2025-03-03 09:44:15,895 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-03-03 09:44:17,016 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a94b765/11b2df1bdf3c474082927c7db0cbfef0/FLAGbf0fc294c [2025-03-03 09:44:17,262 INFO L384 CDTParser]: Found 1 translation units. [2025-03-03 09:44:17,281 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2025-03-03 09:44:17,298 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a94b765/11b2df1bdf3c474082927c7db0cbfef0/FLAGbf0fc294c [2025-03-03 09:44:17,586 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a94b765/11b2df1bdf3c474082927c7db0cbfef0 [2025-03-03 09:44:17,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-03 09:44:17,590 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-03 09:44:17,591 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-03 09:44:17,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-03 09:44:17,595 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-03 09:44:17,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a599250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17, skipping insertion in model container [2025-03-03 09:44:17,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,610 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-03 09:44:17,715 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/bitvector/soft_float_3a.c.cil.c[728,741] [2025-03-03 09:44:17,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:44:17,766 INFO L200 MainTranslator]: Completed pre-run [2025-03-03 09:44:17,774 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/bitvector/soft_float_3a.c.cil.c[728,741] [2025-03-03 09:44:17,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-03 09:44:17,801 INFO L204 MainTranslator]: Completed translation [2025-03-03 09:44:17,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17 WrapperNode [2025-03-03 09:44:17,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-03 09:44:17,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-03 09:44:17,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-03 09:44:17,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-03 09:44:17,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,826 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2025-03-03 09:44:17,827 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-03 09:44:17,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-03 09:44:17,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-03 09:44:17,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-03 09:44:17,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,850 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-03 09:44:17,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,856 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-03 09:44:17,860 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-03 09:44:17,860 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-03 09:44:17,860 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-03 09:44:17,862 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (1/1) ... [2025-03-03 09:44:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-03 09:44:17,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:17,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-03 09:44:17,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-03 09:44:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-03 09:44:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-03 09:44:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2025-03-03 09:44:17,912 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2025-03-03 09:44:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-03 09:44:17,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-03 09:44:17,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-03 09:44:17,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-03 09:44:17,960 INFO L256 CfgBuilder]: Building ICFG [2025-03-03 09:44:17,962 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-03 09:44:18,225 INFO L? ?]: Removed 66 outVars from TransFormulas that were not future-live. [2025-03-03 09:44:18,226 INFO L307 CfgBuilder]: Performing block encoding [2025-03-03 09:44:18,245 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-03 09:44:18,245 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-03 09:44:18,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:18 BoogieIcfgContainer [2025-03-03 09:44:18,245 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-03 09:44:18,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-03 09:44:18,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-03 09:44:18,250 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-03 09:44:18,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.03 09:44:17" (1/3) ... [2025-03-03 09:44:18,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1469c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:44:18, skipping insertion in model container [2025-03-03 09:44:18,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.03 09:44:17" (2/3) ... [2025-03-03 09:44:18,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f1469c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 09:44:18, skipping insertion in model container [2025-03-03 09:44:18,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 03.03 09:44:18" (3/3) ... [2025-03-03 09:44:18,253 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2025-03-03 09:44:18,262 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-03 09:44:18,264 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_3a.c.cil.c that has 3 procedures, 74 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-03 09:44:18,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-03 09:44:18,305 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;@1c7a22b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-03 09:44:18,305 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-03 09:44:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 65 states have (on average 1.523076923076923) internal successors, (99), 67 states have internal predecessors, (99), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-03-03 09:44:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-03-03 09:44:18,313 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:18,313 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:18,313 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:18,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1068011030, now seen corresponding path program 1 times [2025-03-03 09:44:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077176914] [2025-03-03 09:44:18,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:18,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-03 09:44:18,393 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-03 09:44:18,393 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:18,394 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 09:44:18,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:18,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077176914] [2025-03-03 09:44:18,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077176914] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:18,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:18,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-03 09:44:18,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146937871] [2025-03-03 09:44:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:18,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:44:18,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:18,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:44:18,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:18,506 INFO L87 Difference]: Start difference. First operand has 74 states, 65 states have (on average 1.523076923076923) internal successors, (99), 67 states have internal predecessors, (99), 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 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:18,548 INFO L93 Difference]: Finished difference Result 146 states and 221 transitions. [2025-03-03 09:44:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:44:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2025-03-03 09:44:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:18,554 INFO L225 Difference]: With dead ends: 146 [2025-03-03 09:44:18,555 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 09:44:18,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:18,558 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:18,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 189 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 09:44:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-03-03 09:44:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 61 states have internal predecessors, (87), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 09:44:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2025-03-03 09:44:18,584 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 41 [2025-03-03 09:44:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:18,586 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2025-03-03 09:44:18,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2025-03-03 09:44:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 09:44:18,588 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:18,589 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:18,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-03 09:44:18,589 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:18,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 11490873, now seen corresponding path program 1 times [2025-03-03 09:44:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001121438] [2025-03-03 09:44:18,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:18,604 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 09:44:18,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:44:18,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:18,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-03 09:44:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:18,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001121438] [2025-03-03 09:44:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001121438] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:18,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:18,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-03 09:44:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195209685] [2025-03-03 09:44:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:18,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:44:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:18,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:44:18,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:44:18,722 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:18,750 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2025-03-03 09:44:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:44:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2025-03-03 09:44:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:18,751 INFO L225 Difference]: With dead ends: 78 [2025-03-03 09:44:18,751 INFO L226 Difference]: Without dead ends: 68 [2025-03-03 09:44:18,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-03 09:44:18,752 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:18,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-03-03 09:44:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-03-03 09:44:18,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 61 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-03 09:44:18,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2025-03-03 09:44:18,764 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 43 [2025-03-03 09:44:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:18,764 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2025-03-03 09:44:18,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2025-03-03 09:44:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-03-03 09:44:18,765 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:18,765 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:18,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-03 09:44:18,765 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:18,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1754301208, now seen corresponding path program 1 times [2025-03-03 09:44:18,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:18,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343313481] [2025-03-03 09:44:18,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:18,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:18,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 09:44:18,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:44:18,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:18,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:18,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:18,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343313481] [2025-03-03 09:44:18,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343313481] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:18,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286542414] [2025-03-03 09:44:18,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:18,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:18,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:18,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:18,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-03 09:44:18,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-03 09:44:18,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-03 09:44:18,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:18,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:18,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-03 09:44:18,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:19,015 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286542414] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:19,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:19,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-03 09:44:19,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794113564] [2025-03-03 09:44:19,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:19,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:44:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:19,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:44:19,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:44:19,016 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:19,098 INFO L93 Difference]: Finished difference Result 154 states and 220 transitions. [2025-03-03 09:44:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:44:19,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2025-03-03 09:44:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:19,101 INFO L225 Difference]: With dead ends: 154 [2025-03-03 09:44:19,102 INFO L226 Difference]: Without dead ends: 89 [2025-03-03 09:44:19,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:44:19,102 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 21 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:19,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 205 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-03 09:44:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2025-03-03 09:44:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 73 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-03 09:44:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2025-03-03 09:44:19,110 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 43 [2025-03-03 09:44:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:19,110 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2025-03-03 09:44:19,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2025-03-03 09:44:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-03-03 09:44:19,113 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:19,113 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:19,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-03 09:44:19,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:19,314 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:19,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1809221301, now seen corresponding path program 1 times [2025-03-03 09:44:19,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:19,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422035508] [2025-03-03 09:44:19,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:19,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:19,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-03 09:44:19,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 09:44:19,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:19,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:19,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422035508] [2025-03-03 09:44:19,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422035508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:19,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706465105] [2025-03-03 09:44:19,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:19,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:19,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-03 09:44:19,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-03 09:44:19,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-03 09:44:19,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:19,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:19,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:44:19,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:19,477 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:19,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706465105] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:19,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-03 09:44:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662329438] [2025-03-03 09:44:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:19,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:44:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:19,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:44:19,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:44:19,478 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:19,528 INFO L93 Difference]: Finished difference Result 170 states and 240 transitions. [2025-03-03 09:44:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:44:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2025-03-03 09:44:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:19,529 INFO L225 Difference]: With dead ends: 170 [2025-03-03 09:44:19,529 INFO L226 Difference]: Without dead ends: 96 [2025-03-03 09:44:19,529 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:44:19,530 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 15 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:19,530 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 220 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-03 09:44:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2025-03-03 09:44:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 78 states have internal predecessors, (107), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2025-03-03 09:44:19,536 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 46 [2025-03-03 09:44:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:19,536 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2025-03-03 09:44:19,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2025-03-03 09:44:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-03 09:44:19,537 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:19,537 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:19,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:19,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-03 09:44:19,738 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:19,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 293709758, now seen corresponding path program 1 times [2025-03-03 09:44:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:19,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565678603] [2025-03-03 09:44:19,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:19,743 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-03 09:44:19,746 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-03 09:44:19,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:19,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:19,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565678603] [2025-03-03 09:44:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565678603] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:19,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190915592] [2025-03-03 09:44:19,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:19,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:19,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:19,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:19,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-03 09:44:19,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-03 09:44:19,847 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-03 09:44:19,847 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:19,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:19,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-03 09:44:19,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:19,875 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:19,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190915592] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:19,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:19,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-03 09:44:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826644276] [2025-03-03 09:44:19,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:19,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-03 09:44:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:19,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-03 09:44:19,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:44:19,876 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:19,947 INFO L93 Difference]: Finished difference Result 176 states and 249 transitions. [2025-03-03 09:44:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-03 09:44:19,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2025-03-03 09:44:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:19,948 INFO L225 Difference]: With dead ends: 176 [2025-03-03 09:44:19,948 INFO L226 Difference]: Without dead ends: 97 [2025-03-03 09:44:19,949 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:44:19,950 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 16 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:19,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 222 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:19,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-03 09:44:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2025-03-03 09:44:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 79 states have internal predecessors, (109), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2025-03-03 09:44:19,956 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2025-03-03 09:44:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:19,957 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2025-03-03 09:44:19,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2025-03-03 09:44:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-03-03 09:44:19,958 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:19,958 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:19,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:20,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:20,159 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:20,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash -285662292, now seen corresponding path program 1 times [2025-03-03 09:44:20,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:20,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553961927] [2025-03-03 09:44:20,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:20,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:20,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 09:44:20,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 09:44:20,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:20,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553961927] [2025-03-03 09:44:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553961927] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:20,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062470981] [2025-03-03 09:44:20,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:20,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:20,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:20,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-03 09:44:20,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-03 09:44:20,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-03 09:44:20,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:20,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:20,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:44:20,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:20,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:20,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062470981] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:20,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:20,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-03 09:44:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425411453] [2025-03-03 09:44:20,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:20,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 09:44:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:20,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 09:44:20,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:44:20,413 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:20,514 INFO L93 Difference]: Finished difference Result 227 states and 328 transitions. [2025-03-03 09:44:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:44:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2025-03-03 09:44:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:20,516 INFO L225 Difference]: With dead ends: 227 [2025-03-03 09:44:20,516 INFO L226 Difference]: Without dead ends: 147 [2025-03-03 09:44:20,516 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-03 09:44:20,516 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 116 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:20,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 336 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2025-03-03 09:44:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2025-03-03 09:44:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.434782608695652) internal successors, (132), 93 states have internal predecessors, (132), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2025-03-03 09:44:20,524 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 49 [2025-03-03 09:44:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:20,527 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2025-03-03 09:44:20,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2025-03-03 09:44:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-03 09:44:20,531 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:20,531 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:20,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:20,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:20,732 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:20,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash 518660489, now seen corresponding path program 1 times [2025-03-03 09:44:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:20,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946373389] [2025-03-03 09:44:20,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:20,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:20,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-03 09:44:20,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-03 09:44:20,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:20,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:20,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946373389] [2025-03-03 09:44:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946373389] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:20,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762194207] [2025-03-03 09:44:20,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:20,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:20,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-03 09:44:20,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-03 09:44:20,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-03 09:44:20,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:20,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:20,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:44:20,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:20,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762194207] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:20,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:20,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-03 09:44:20,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721764200] [2025-03-03 09:44:20,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:20,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 09:44:20,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:20,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 09:44:20,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:44:20,963 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:21,109 INFO L93 Difference]: Finished difference Result 246 states and 360 transitions. [2025-03-03 09:44:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:44:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2025-03-03 09:44:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:21,111 INFO L225 Difference]: With dead ends: 246 [2025-03-03 09:44:21,112 INFO L226 Difference]: Without dead ends: 152 [2025-03-03 09:44:21,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-03 09:44:21,113 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 76 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:21,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 527 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:21,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-03 09:44:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 110. [2025-03-03 09:44:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 101 states have (on average 1.4554455445544554) internal successors, (147), 102 states have internal predecessors, (147), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 160 transitions. [2025-03-03 09:44:21,127 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 160 transitions. Word has length 50 [2025-03-03 09:44:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:21,128 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 160 transitions. [2025-03-03 09:44:21,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 160 transitions. [2025-03-03 09:44:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 09:44:21,128 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:21,129 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:21,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-03 09:44:21,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:21,329 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:21,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1321341142, now seen corresponding path program 1 times [2025-03-03 09:44:21,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:21,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617564062] [2025-03-03 09:44:21,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:21,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:21,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 09:44:21,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:44:21,338 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:21,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617564062] [2025-03-03 09:44:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617564062] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705839868] [2025-03-03 09:44:21,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:21,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:21,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:21,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-03 09:44:21,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 09:44:21,412 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:44:21,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:21,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:21,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:44:21,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 09:44:21,423 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:21,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705839868] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:21,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:21,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-03 09:44:21,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973829913] [2025-03-03 09:44:21,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:21,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:44:21,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:21,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:44:21,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:21,425 INFO L87 Difference]: Start difference. First operand 110 states and 160 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:21,460 INFO L93 Difference]: Finished difference Result 218 states and 324 transitions. [2025-03-03 09:44:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:44:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2025-03-03 09:44:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:21,461 INFO L225 Difference]: With dead ends: 218 [2025-03-03 09:44:21,461 INFO L226 Difference]: Without dead ends: 115 [2025-03-03 09:44:21,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:21,462 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:21,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 160 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-03 09:44:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2025-03-03 09:44:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 99 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2025-03-03 09:44:21,475 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 51 [2025-03-03 09:44:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:21,475 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2025-03-03 09:44:21,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2025-03-03 09:44:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-03 09:44:21,476 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:21,476 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:21,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:21,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:21,676 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:21,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 371351119, now seen corresponding path program 1 times [2025-03-03 09:44:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566417556] [2025-03-03 09:44:21,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:21,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 09:44:21,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:44:21,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:21,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:21,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566417556] [2025-03-03 09:44:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566417556] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177468460] [2025-03-03 09:44:21,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:21,712 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:21,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-03 09:44:21,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-03 09:44:21,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-03 09:44:21,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:21,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:21,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-03 09:44:21,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 09:44:21,769 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:21,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177468460] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:21,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:21,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2025-03-03 09:44:21,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477038626] [2025-03-03 09:44:21,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:21,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:44:21,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:21,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:44:21,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:21,770 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:21,807 INFO L93 Difference]: Finished difference Result 215 states and 316 transitions. [2025-03-03 09:44:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:44:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2025-03-03 09:44:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:21,808 INFO L225 Difference]: With dead ends: 215 [2025-03-03 09:44:21,808 INFO L226 Difference]: Without dead ends: 115 [2025-03-03 09:44:21,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-03 09:44:21,809 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 5 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:21,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-03 09:44:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2025-03-03 09:44:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 100 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 154 transitions. [2025-03-03 09:44:21,819 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 154 transitions. Word has length 51 [2025-03-03 09:44:21,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:21,819 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 154 transitions. [2025-03-03 09:44:21,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:21,819 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 154 transitions. [2025-03-03 09:44:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-03 09:44:21,820 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:21,820 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:21,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-03 09:44:22,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:22,021 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:22,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1891769809, now seen corresponding path program 1 times [2025-03-03 09:44:22,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:22,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934986631] [2025-03-03 09:44:22,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:22,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:44:22,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:44:22,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:22,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:22,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934986631] [2025-03-03 09:44:22,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934986631] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132667694] [2025-03-03 09:44:22,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:22,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:22,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:22,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-03 09:44:22,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:44:22,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:44:22,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:22,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:22,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-03 09:44:22,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-03 09:44:22,165 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132667694] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:22,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-03-03 09:44:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883549735] [2025-03-03 09:44:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:22,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-03 09:44:22,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:22,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-03 09:44:22,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:44:22,166 INFO L87 Difference]: Start difference. First operand 108 states and 154 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:22,202 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2025-03-03 09:44:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-03 09:44:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2025-03-03 09:44:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:22,203 INFO L225 Difference]: With dead ends: 216 [2025-03-03 09:44:22,203 INFO L226 Difference]: Without dead ends: 115 [2025-03-03 09:44:22,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:44:22,204 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:22,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 166 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-03 09:44:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2025-03-03 09:44:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.4183673469387754) internal successors, (139), 99 states have internal predecessors, (139), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-03-03 09:44:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 152 transitions. [2025-03-03 09:44:22,210 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 152 transitions. Word has length 52 [2025-03-03 09:44:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:22,210 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 152 transitions. [2025-03-03 09:44:22,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 152 transitions. [2025-03-03 09:44:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-03 09:44:22,210 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:22,210 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:22,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:22,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-03 09:44:22,411 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:22,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1292142129, now seen corresponding path program 1 times [2025-03-03 09:44:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:22,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277611487] [2025-03-03 09:44:22,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:22,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:44:22,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:44:22,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:22,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277611487] [2025-03-03 09:44:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277611487] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001321326] [2025-03-03 09:44:22,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:22,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:22,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:22,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:22,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-03 09:44:22,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:44:22,555 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:44:22,555 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:22,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:22,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 09:44:22,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:22,593 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:22,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001321326] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:22,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:22,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2025-03-03 09:44:22,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091871220] [2025-03-03 09:44:22,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:22,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:44:22,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:22,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:44:22,594 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-03 09:44:22,594 INFO L87 Difference]: Start difference. First operand 107 states and 152 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:22,637 INFO L93 Difference]: Finished difference Result 153 states and 216 transitions. [2025-03-03 09:44:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:44:22,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2025-03-03 09:44:22,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:22,638 INFO L225 Difference]: With dead ends: 153 [2025-03-03 09:44:22,638 INFO L226 Difference]: Without dead ends: 116 [2025-03-03 09:44:22,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-03 09:44:22,639 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 1 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:22,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 415 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2025-03-03 09:44:22,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2025-03-03 09:44:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 105 states have (on average 1.3904761904761904) internal successors, (146), 107 states have internal predecessors, (146), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2025-03-03 09:44:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 164 transitions. [2025-03-03 09:44:22,645 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 164 transitions. Word has length 52 [2025-03-03 09:44:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:22,645 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 164 transitions. [2025-03-03 09:44:22,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 164 transitions. [2025-03-03 09:44:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-03 09:44:22,646 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:22,646 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:22,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-03 09:44:22,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:22,849 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:22,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 998739122, now seen corresponding path program 1 times [2025-03-03 09:44:22,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:22,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956705700] [2025-03-03 09:44:22,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:22,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:22,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:44:22,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:44:22,857 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:22,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:22,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956705700] [2025-03-03 09:44:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956705700] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939345366] [2025-03-03 09:44:22,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:22,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:22,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:22,908 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:22,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-03 09:44:22,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-03 09:44:22,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-03 09:44:22,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:22,952 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:22,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 09:44:22,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:44:23,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:44:23,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939345366] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:23,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:23,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 26 [2025-03-03 09:44:23,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452331635] [2025-03-03 09:44:23,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:23,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-03 09:44:23,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:23,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-03 09:44:23,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2025-03-03 09:44:23,388 INFO L87 Difference]: Start difference. First operand 116 states and 164 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 22 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:24,381 INFO L93 Difference]: Finished difference Result 317 states and 473 transitions. [2025-03-03 09:44:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-03 09:44:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 22 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2025-03-03 09:44:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:24,384 INFO L225 Difference]: With dead ends: 317 [2025-03-03 09:44:24,384 INFO L226 Difference]: Without dead ends: 201 [2025-03-03 09:44:24,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2025-03-03 09:44:24,386 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 120 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:24,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1184 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-03 09:44:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2025-03-03 09:44:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 121. [2025-03-03 09:44:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 107 states have (on average 1.3364485981308412) internal successors, (143), 110 states have internal predecessors, (143), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (25), 7 states have call predecessors, (25), 6 states have call successors, (25) [2025-03-03 09:44:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2025-03-03 09:44:24,399 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 52 [2025-03-03 09:44:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:24,400 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2025-03-03 09:44:24,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 22 states have internal predecessors, (84), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2025-03-03 09:44:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-03-03 09:44:24,401 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:24,401 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:24,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-03 09:44:24,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-03 09:44:24,604 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:24,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2018220881, now seen corresponding path program 1 times [2025-03-03 09:44:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363549662] [2025-03-03 09:44:24,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:24,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:24,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-03 09:44:24,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:44:24,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:24,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 09:44:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363549662] [2025-03-03 09:44:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363549662] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341945790] [2025-03-03 09:44:24,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:24,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:24,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:24,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:24,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-03 09:44:24,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-03-03 09:44:24,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-03-03 09:44:24,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:24,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:24,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-03 09:44:24,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:44:24,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:44:25,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341945790] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:25,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:25,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 15] total 32 [2025-03-03 09:44:25,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82535321] [2025-03-03 09:44:25,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:25,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-03 09:44:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:25,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-03 09:44:25,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2025-03-03 09:44:25,332 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 27 states have internal predecessors, (95), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:26,899 INFO L93 Difference]: Finished difference Result 442 states and 731 transitions. [2025-03-03 09:44:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-03-03 09:44:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 27 states have internal predecessors, (95), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 56 [2025-03-03 09:44:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:26,903 INFO L225 Difference]: With dead ends: 442 [2025-03-03 09:44:26,903 INFO L226 Difference]: Without dead ends: 405 [2025-03-03 09:44:26,906 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=4120, Unknown=0, NotChecked=0, Total=4556 [2025-03-03 09:44:26,907 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 417 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:26,907 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2361 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2025-03-03 09:44:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2025-03-03 09:44:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 172. [2025-03-03 09:44:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 156 states have (on average 1.3333333333333333) internal successors, (208), 157 states have internal predecessors, (208), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (34), 11 states have call predecessors, (34), 8 states have call successors, (34) [2025-03-03 09:44:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 251 transitions. [2025-03-03 09:44:26,929 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 251 transitions. Word has length 56 [2025-03-03 09:44:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:26,930 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 251 transitions. [2025-03-03 09:44:26,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 27 states have internal predecessors, (95), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 251 transitions. [2025-03-03 09:44:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-03 09:44:26,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:26,931 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:26,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:27,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-03 09:44:27,131 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:27,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 322762137, now seen corresponding path program 1 times [2025-03-03 09:44:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665388450] [2025-03-03 09:44:27,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:27,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:27,136 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-03 09:44:27,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-03 09:44:27,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:27,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-03 09:44:27,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665388450] [2025-03-03 09:44:27,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665388450] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:27,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:27,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-03 09:44:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478137191] [2025-03-03 09:44:27,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:27,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-03 09:44:27,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:27,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-03 09:44:27,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-03 09:44:27,222 INFO L87 Difference]: Start difference. First operand 172 states and 251 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:27,265 INFO L93 Difference]: Finished difference Result 178 states and 256 transitions. [2025-03-03 09:44:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:44:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2025-03-03 09:44:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:27,267 INFO L225 Difference]: With dead ends: 178 [2025-03-03 09:44:27,268 INFO L226 Difference]: Without dead ends: 161 [2025-03-03 09:44:27,269 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:44:27,269 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 1 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:27,270 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 423 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-03 09:44:27,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2025-03-03 09:44:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 144 states have (on average 1.3402777777777777) internal successors, (193), 146 states have internal predecessors, (193), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2025-03-03 09:44:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 229 transitions. [2025-03-03 09:44:27,284 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 229 transitions. Word has length 59 [2025-03-03 09:44:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:27,285 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 229 transitions. [2025-03-03 09:44:27,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 229 transitions. [2025-03-03 09:44:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-03-03 09:44:27,287 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:27,287 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:27,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-03 09:44:27,287 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:27,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -770791151, now seen corresponding path program 1 times [2025-03-03 09:44:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:27,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465060329] [2025-03-03 09:44:27,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:27,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:27,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-03 09:44:27,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 09:44:27,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:27,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-03 09:44:27,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465060329] [2025-03-03 09:44:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465060329] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:27,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666794635] [2025-03-03 09:44:27,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:27,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:27,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:27,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-03 09:44:27,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-03 09:44:27,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-03 09:44:27,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:27,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:27,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 09:44:27,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-03-03 09:44:27,483 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:27,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666794635] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:27,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:27,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2025-03-03 09:44:27,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527944288] [2025-03-03 09:44:27,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:27,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 09:44:27,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:27,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 09:44:27,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-03-03 09:44:27,484 INFO L87 Difference]: Start difference. First operand 159 states and 229 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:27,589 INFO L93 Difference]: Finished difference Result 242 states and 355 transitions. [2025-03-03 09:44:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:44:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2025-03-03 09:44:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:27,591 INFO L225 Difference]: With dead ends: 242 [2025-03-03 09:44:27,591 INFO L226 Difference]: Without dead ends: 204 [2025-03-03 09:44:27,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:44:27,593 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 47 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:27,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 816 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2025-03-03 09:44:27,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2025-03-03 09:44:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 186 states have (on average 1.3333333333333333) internal successors, (248), 186 states have internal predecessors, (248), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (44), 14 states have call predecessors, (44), 9 states have call successors, (44) [2025-03-03 09:44:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 302 transitions. [2025-03-03 09:44:27,604 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 302 transitions. Word has length 61 [2025-03-03 09:44:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:27,604 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 302 transitions. [2025-03-03 09:44:27,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 302 transitions. [2025-03-03 09:44:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2025-03-03 09:44:27,608 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:27,608 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:27,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-03 09:44:27,813 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,SelfDestructingSolverStorable14 [2025-03-03 09:44:27,813 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:27,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash 266807718, now seen corresponding path program 1 times [2025-03-03 09:44:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162897477] [2025-03-03 09:44:27,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:27,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 09:44:27,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 09:44:27,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:27,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162897477] [2025-03-03 09:44:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162897477] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591285308] [2025-03-03 09:44:27,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:27,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:27,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-03 09:44:27,940 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 62 statements into 1 equivalence classes. [2025-03-03 09:44:27,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 62 of 62 statements. [2025-03-03 09:44:27,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:27,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:27,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 09:44:27,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:28,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:28,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591285308] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:28,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-03-03 09:44:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930636673] [2025-03-03 09:44:28,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:28,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-03 09:44:28,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:28,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-03 09:44:28,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:44:28,141 INFO L87 Difference]: Start difference. First operand 204 states and 302 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:28,326 INFO L93 Difference]: Finished difference Result 486 states and 711 transitions. [2025-03-03 09:44:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-03 09:44:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2025-03-03 09:44:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:28,328 INFO L225 Difference]: With dead ends: 486 [2025-03-03 09:44:28,328 INFO L226 Difference]: Without dead ends: 295 [2025-03-03 09:44:28,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2025-03-03 09:44:28,329 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 196 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:28,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 772 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:44:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2025-03-03 09:44:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 218. [2025-03-03 09:44:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 200 states have (on average 1.355) internal successors, (271), 200 states have internal predecessors, (271), 10 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (44), 14 states have call predecessors, (44), 9 states have call successors, (44) [2025-03-03 09:44:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 325 transitions. [2025-03-03 09:44:28,346 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 325 transitions. Word has length 62 [2025-03-03 09:44:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:28,346 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 325 transitions. [2025-03-03 09:44:28,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 325 transitions. [2025-03-03 09:44:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-03 09:44:28,348 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:28,348 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:28,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-03 09:44:28,548 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,SelfDestructingSolverStorable15 [2025-03-03 09:44:28,549 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:28,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1812338802, now seen corresponding path program 1 times [2025-03-03 09:44:28,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:28,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936260505] [2025-03-03 09:44:28,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:28,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:28,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-03 09:44:28,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 09:44:28,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:28,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:44:28,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:28,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936260505] [2025-03-03 09:44:28,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936260505] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:28,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541457853] [2025-03-03 09:44:28,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:28,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:28,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:28,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:28,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-03 09:44:28,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-03 09:44:28,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-03 09:44:28,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:28,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:28,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-03 09:44:28,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 09:44:29,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-03 09:44:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541457853] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:29,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:29,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 27 [2025-03-03 09:44:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72592948] [2025-03-03 09:44:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:29,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-03 09:44:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:29,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-03 09:44:29,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2025-03-03 09:44:29,520 INFO L87 Difference]: Start difference. First operand 218 states and 325 transitions. Second operand has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 22 states have internal predecessors, (89), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:30,107 INFO L93 Difference]: Finished difference Result 470 states and 740 transitions. [2025-03-03 09:44:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-03 09:44:30,108 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 22 states have internal predecessors, (89), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2025-03-03 09:44:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:30,109 INFO L225 Difference]: With dead ends: 470 [2025-03-03 09:44:30,109 INFO L226 Difference]: Without dead ends: 338 [2025-03-03 09:44:30,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2025-03-03 09:44:30,110 INFO L435 NwaCegarLoop]: 118 mSDtfsCounter, 291 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:30,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 2112 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-03 09:44:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2025-03-03 09:44:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 240. [2025-03-03 09:44:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 213 states have (on average 1.3286384976525822) internal successors, (283), 215 states have internal predecessors, (283), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 409 transitions. [2025-03-03 09:44:30,130 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 409 transitions. Word has length 64 [2025-03-03 09:44:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:30,130 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 409 transitions. [2025-03-03 09:44:30,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 22 states have internal predecessors, (89), 5 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 409 transitions. [2025-03-03 09:44:30,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2025-03-03 09:44:30,132 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:30,132 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:30,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-03 09:44:30,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:30,337 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:30,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash -361632459, now seen corresponding path program 1 times [2025-03-03 09:44:30,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:30,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097173481] [2025-03-03 09:44:30,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:30,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-03 09:44:30,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 09:44:30,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:30,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:30,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097173481] [2025-03-03 09:44:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097173481] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:30,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945691705] [2025-03-03 09:44:30,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:30,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:30,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:30,417 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:30,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-03 09:44:30,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-03 09:44:30,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-03 09:44:30,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:30,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:30,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 09:44:30,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:30,504 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945691705] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:30,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:30,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2025-03-03 09:44:30,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54840045] [2025-03-03 09:44:30,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:30,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:44:30,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:30,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:44:30,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 09:44:30,506 INFO L87 Difference]: Start difference. First operand 240 states and 409 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:30,592 INFO L93 Difference]: Finished difference Result 465 states and 740 transitions. [2025-03-03 09:44:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:44:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2025-03-03 09:44:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:30,594 INFO L225 Difference]: With dead ends: 465 [2025-03-03 09:44:30,594 INFO L226 Difference]: Without dead ends: 258 [2025-03-03 09:44:30,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-03 09:44:30,595 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 16 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:30,595 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 306 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2025-03-03 09:44:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2025-03-03 09:44:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 219 states have (on average 1.3287671232876712) internal successors, (291), 221 states have internal predecessors, (291), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 417 transitions. [2025-03-03 09:44:30,609 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 417 transitions. Word has length 65 [2025-03-03 09:44:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:30,609 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 417 transitions. [2025-03-03 09:44:30,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 417 transitions. [2025-03-03 09:44:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-03 09:44:30,611 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:30,611 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:30,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:30,812 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,SelfDestructingSolverStorable17 [2025-03-03 09:44:30,812 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:30,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 737427578, now seen corresponding path program 1 times [2025-03-03 09:44:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361304777] [2025-03-03 09:44:30,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:30,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-03 09:44:30,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 09:44:30,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:30,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-03 09:44:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361304777] [2025-03-03 09:44:30,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361304777] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034553270] [2025-03-03 09:44:30,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:30,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:30,931 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:30,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-03 09:44:30,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-03 09:44:30,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 09:44:30,976 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:30,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:30,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-03 09:44:30,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-03 09:44:30,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2025-03-03 09:44:31,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034553270] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:31,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-03 09:44:31,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2025-03-03 09:44:31,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822881045] [2025-03-03 09:44:31,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:31,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:44:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:31,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:44:31,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-03 09:44:31,053 INFO L87 Difference]: Start difference. First operand 246 states and 417 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:31,108 INFO L93 Difference]: Finished difference Result 272 states and 445 transitions. [2025-03-03 09:44:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-03 09:44:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2025-03-03 09:44:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:31,110 INFO L225 Difference]: With dead ends: 272 [2025-03-03 09:44:31,110 INFO L226 Difference]: Without dead ends: 260 [2025-03-03 09:44:31,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:44:31,111 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 10 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:31,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 239 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2025-03-03 09:44:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 247. [2025-03-03 09:44:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 220 states have (on average 1.3318181818181818) internal successors, (293), 222 states have internal predecessors, (293), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 419 transitions. [2025-03-03 09:44:31,129 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 419 transitions. Word has length 66 [2025-03-03 09:44:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:31,129 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 419 transitions. [2025-03-03 09:44:31,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 419 transitions. [2025-03-03 09:44:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-03 09:44:31,131 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:31,131 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:31,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:31,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:31,332 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:31,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash 444024571, now seen corresponding path program 1 times [2025-03-03 09:44:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:31,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031925923] [2025-03-03 09:44:31,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:31,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-03 09:44:31,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 09:44:31,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:31,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:31,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031925923] [2025-03-03 09:44:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031925923] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335361325] [2025-03-03 09:44:31,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:31,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:31,418 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:31,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-03 09:44:31,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-03 09:44:31,477 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-03 09:44:31,477 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:31,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:31,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-03 09:44:31,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-03 09:44:31,571 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335361325] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:31,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2025-03-03 09:44:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555636883] [2025-03-03 09:44:31,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:31,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 09:44:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:31,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 09:44:31,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:44:31,572 INFO L87 Difference]: Start difference. First operand 247 states and 419 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:31,672 INFO L93 Difference]: Finished difference Result 494 states and 844 transitions. [2025-03-03 09:44:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:44:31,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2025-03-03 09:44:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:31,676 INFO L225 Difference]: With dead ends: 494 [2025-03-03 09:44:31,676 INFO L226 Difference]: Without dead ends: 272 [2025-03-03 09:44:31,677 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-03 09:44:31,677 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 38 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:31,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 308 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2025-03-03 09:44:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 241. [2025-03-03 09:44:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.3317757009345794) internal successors, (285), 216 states have internal predecessors, (285), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 411 transitions. [2025-03-03 09:44:31,690 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 411 transitions. Word has length 66 [2025-03-03 09:44:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:31,690 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 411 transitions. [2025-03-03 09:44:31,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 411 transitions. [2025-03-03 09:44:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-03-03 09:44:31,692 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:31,692 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:31,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:31,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:31,896 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:31,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -470794956, now seen corresponding path program 1 times [2025-03-03 09:44:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736617238] [2025-03-03 09:44:31,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:31,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-03 09:44:31,907 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 09:44:31,907 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:31,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:31,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:31,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736617238] [2025-03-03 09:44:31,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736617238] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:31,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775998613] [2025-03-03 09:44:31,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:31,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:31,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:31,999 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:32,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-03 09:44:32,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-03-03 09:44:32,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-03-03 09:44:32,050 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:32,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:32,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-03 09:44:32,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:32,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:32,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775998613] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:32,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:32,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-03 09:44:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057844517] [2025-03-03 09:44:32,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:32,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-03 09:44:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:32,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-03 09:44:32,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2025-03-03 09:44:32,172 INFO L87 Difference]: Start difference. First operand 241 states and 411 transitions. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:44:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:32,340 INFO L93 Difference]: Finished difference Result 502 states and 827 transitions. [2025-03-03 09:44:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 09:44:32,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2025-03-03 09:44:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:32,342 INFO L225 Difference]: With dead ends: 502 [2025-03-03 09:44:32,342 INFO L226 Difference]: Without dead ends: 294 [2025-03-03 09:44:32,342 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2025-03-03 09:44:32,343 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 82 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:32,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 471 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2025-03-03 09:44:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 241. [2025-03-03 09:44:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.3317757009345794) internal successors, (285), 216 states have internal predecessors, (285), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 21 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 411 transitions. [2025-03-03 09:44:32,360 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 411 transitions. Word has length 68 [2025-03-03 09:44:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:32,360 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 411 transitions. [2025-03-03 09:44:32,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:44:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 411 transitions. [2025-03-03 09:44:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-03-03 09:44:32,362 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:32,362 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:32,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:32,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:32,563 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:32,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1354954460, now seen corresponding path program 1 times [2025-03-03 09:44:32,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:32,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000143102] [2025-03-03 09:44:32,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:32,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-03 09:44:32,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-03 09:44:32,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:32,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:32,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:32,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000143102] [2025-03-03 09:44:32,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000143102] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:32,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505322723] [2025-03-03 09:44:32,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:32,670 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:32,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-03 09:44:32,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-03-03 09:44:32,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-03-03 09:44:32,717 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:32,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:32,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-03 09:44:32,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:32,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:33,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505322723] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:33,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:33,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 13] total 28 [2025-03-03 09:44:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085163379] [2025-03-03 09:44:33,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:33,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-03 09:44:33,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:33,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-03 09:44:33,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2025-03-03 09:44:33,106 INFO L87 Difference]: Start difference. First operand 241 states and 411 transitions. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:34,748 INFO L93 Difference]: Finished difference Result 657 states and 1120 transitions. [2025-03-03 09:44:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-03-03 09:44:34,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 69 [2025-03-03 09:44:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:34,753 INFO L225 Difference]: With dead ends: 657 [2025-03-03 09:44:34,753 INFO L226 Difference]: Without dead ends: 433 [2025-03-03 09:44:34,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=612, Invalid=4500, Unknown=0, NotChecked=0, Total=5112 [2025-03-03 09:44:34,759 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 310 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:34,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1099 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-03-03 09:44:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2025-03-03 09:44:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 246. [2025-03-03 09:44:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 219 states have (on average 1.3333333333333333) internal successors, (292), 219 states have internal predecessors, (292), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 23 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 418 transitions. [2025-03-03 09:44:34,778 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 418 transitions. Word has length 69 [2025-03-03 09:44:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:34,778 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 418 transitions. [2025-03-03 09:44:34,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 418 transitions. [2025-03-03 09:44:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-03 09:44:34,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:34,780 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:34,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:34,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:34,984 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:34,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 554633899, now seen corresponding path program 1 times [2025-03-03 09:44:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:34,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996073149] [2025-03-03 09:44:34,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:34,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-03 09:44:35,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 09:44:35,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:35,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996073149] [2025-03-03 09:44:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996073149] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:35,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327251027] [2025-03-03 09:44:35,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:35,178 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:35,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-03 09:44:35,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-03 09:44:35,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-03 09:44:35,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:35,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:35,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-03 09:44:35,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:44:35,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:44:36,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327251027] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:36,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:36,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 19] total 44 [2025-03-03 09:44:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814114715] [2025-03-03 09:44:36,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:36,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 09:44:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:36,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 09:44:36,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 09:44:36,097 INFO L87 Difference]: Start difference. First operand 246 states and 418 transitions. Second operand has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 40 states have internal predecessors, (137), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:40,096 INFO L93 Difference]: Finished difference Result 824 states and 1540 transitions. [2025-03-03 09:44:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2025-03-03 09:44:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 40 states have internal predecessors, (137), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 72 [2025-03-03 09:44:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:40,101 INFO L225 Difference]: With dead ends: 824 [2025-03-03 09:44:40,101 INFO L226 Difference]: Without dead ends: 571 [2025-03-03 09:44:40,105 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2136, Invalid=13614, Unknown=0, NotChecked=0, Total=15750 [2025-03-03 09:44:40,105 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 1049 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 4385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:40,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 2526 Invalid, 4385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-03 09:44:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2025-03-03 09:44:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 266. [2025-03-03 09:44:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 235 states have (on average 1.3404255319148937) internal successors, (315), 236 states have internal predecessors, (315), 20 states have call successors, (20), 3 states have call predecessors, (20), 10 states have return successors, (148), 26 states have call predecessors, (148), 19 states have call successors, (148) [2025-03-03 09:44:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 483 transitions. [2025-03-03 09:44:40,125 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 483 transitions. Word has length 72 [2025-03-03 09:44:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:40,125 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 483 transitions. [2025-03-03 09:44:40,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1136363636363638) internal successors, (137), 40 states have internal predecessors, (137), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 483 transitions. [2025-03-03 09:44:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-03-03 09:44:40,127 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:40,127 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:40,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-03 09:44:40,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-03 09:44:40,334 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:40,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1173415226, now seen corresponding path program 2 times [2025-03-03 09:44:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322221883] [2025-03-03 09:44:40,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:44:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:40,339 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-03-03 09:44:40,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 09:44:40,345 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:44:40,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:40,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322221883] [2025-03-03 09:44:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322221883] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459951805] [2025-03-03 09:44:40,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:44:40,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:40,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:40,487 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:40,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-03 09:44:40,518 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-03-03 09:44:40,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-03-03 09:44:40,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:44:40,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:40,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-03 09:44:40,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:40,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:40,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459951805] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:40,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:40,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2025-03-03 09:44:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626906341] [2025-03-03 09:44:40,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:40,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-03 09:44:40,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:40,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-03 09:44:40,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2025-03-03 09:44:40,913 INFO L87 Difference]: Start difference. First operand 266 states and 483 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:41,131 INFO L93 Difference]: Finished difference Result 679 states and 1102 transitions. [2025-03-03 09:44:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-03 09:44:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2025-03-03 09:44:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:41,134 INFO L225 Difference]: With dead ends: 679 [2025-03-03 09:44:41,134 INFO L226 Difference]: Without dead ends: 453 [2025-03-03 09:44:41,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=957, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:44:41,135 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 422 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:41,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 1121 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:44:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2025-03-03 09:44:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 292. [2025-03-03 09:44:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 261 states have (on average 1.371647509578544) internal successors, (358), 262 states have internal predecessors, (358), 20 states have call successors, (20), 3 states have call predecessors, (20), 10 states have return successors, (148), 26 states have call predecessors, (148), 19 states have call successors, (148) [2025-03-03 09:44:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 526 transitions. [2025-03-03 09:44:41,153 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 526 transitions. Word has length 80 [2025-03-03 09:44:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:41,153 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 526 transitions. [2025-03-03 09:44:41,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:44:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 526 transitions. [2025-03-03 09:44:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-03 09:44:41,155 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:41,155 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:41,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-03 09:44:41,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-03 09:44:41,356 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:41,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 679929877, now seen corresponding path program 2 times [2025-03-03 09:44:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:41,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017226008] [2025-03-03 09:44:41,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:44:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:41,360 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 83 statements into 2 equivalence classes. [2025-03-03 09:44:41,376 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 33 of 83 statements. [2025-03-03 09:44:41,378 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-03 09:44:41,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2025-03-03 09:44:41,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:41,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017226008] [2025-03-03 09:44:41,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017226008] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:41,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:41,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-03 09:44:41,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971597294] [2025-03-03 09:44:41,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:41,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-03 09:44:41,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:41,459 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-03 09:44:41,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:44:41,459 INFO L87 Difference]: Start difference. First operand 292 states and 526 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:41,549 INFO L93 Difference]: Finished difference Result 396 states and 665 transitions. [2025-03-03 09:44:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-03 09:44:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 83 [2025-03-03 09:44:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:41,551 INFO L225 Difference]: With dead ends: 396 [2025-03-03 09:44:41,551 INFO L226 Difference]: Without dead ends: 323 [2025-03-03 09:44:41,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-03 09:44:41,552 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 5 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:41,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 483 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2025-03-03 09:44:41,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 314. [2025-03-03 09:44:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 283 states have (on average 1.3568904593639577) internal successors, (384), 282 states have internal predecessors, (384), 20 states have call successors, (20), 3 states have call predecessors, (20), 10 states have return successors, (148), 28 states have call predecessors, (148), 19 states have call successors, (148) [2025-03-03 09:44:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 552 transitions. [2025-03-03 09:44:41,579 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 552 transitions. Word has length 83 [2025-03-03 09:44:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:41,579 INFO L471 AbstractCegarLoop]: Abstraction has 314 states and 552 transitions. [2025-03-03 09:44:41,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 552 transitions. [2025-03-03 09:44:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-03 09:44:41,581 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:41,581 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:41,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-03 09:44:41,581 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:41,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1627281381, now seen corresponding path program 2 times [2025-03-03 09:44:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029890573] [2025-03-03 09:44:41,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:44:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:41,586 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 09:44:41,602 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 09:44:41,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:44:41,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029890573] [2025-03-03 09:44:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029890573] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170806639] [2025-03-03 09:44:41,789 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:44:41,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:41,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:41,791 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:41,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-03 09:44:41,822 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 84 statements into 2 equivalence classes. [2025-03-03 09:44:41,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 84 of 84 statements. [2025-03-03 09:44:41,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:44:41,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:41,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-03 09:44:41,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:42,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:42,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170806639] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:42,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:42,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 19] total 44 [2025-03-03 09:44:42,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774167129] [2025-03-03 09:44:42,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:42,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-03-03 09:44:42,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:42,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-03-03 09:44:42,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2025-03-03 09:44:42,592 INFO L87 Difference]: Start difference. First operand 314 states and 552 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 41 states have internal predecessors, (147), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:48,112 INFO L93 Difference]: Finished difference Result 986 states and 1881 transitions. [2025-03-03 09:44:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2025-03-03 09:44:48,113 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 41 states have internal predecessors, (147), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 84 [2025-03-03 09:44:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:48,117 INFO L225 Difference]: With dead ends: 986 [2025-03-03 09:44:48,117 INFO L226 Difference]: Without dead ends: 683 [2025-03-03 09:44:48,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4956 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2526, Invalid=15030, Unknown=0, NotChecked=0, Total=17556 [2025-03-03 09:44:48,122 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 1239 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 4145 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 4558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 4145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:48,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 2233 Invalid, 4558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 4145 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2025-03-03 09:44:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2025-03-03 09:44:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 304. [2025-03-03 09:44:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 277 states have (on average 1.364620938628159) internal successors, (378), 275 states have internal predecessors, (378), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 25 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 504 transitions. [2025-03-03 09:44:48,150 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 504 transitions. Word has length 84 [2025-03-03 09:44:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:48,150 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 504 transitions. [2025-03-03 09:44:48,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 41 states have internal predecessors, (147), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:44:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 504 transitions. [2025-03-03 09:44:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-03 09:44:48,151 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:48,151 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:48,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:48,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-03 09:44:48,353 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:48,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 797703969, now seen corresponding path program 1 times [2025-03-03 09:44:48,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:48,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719897718] [2025-03-03 09:44:48,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:48,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:48,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-03 09:44:48,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 09:44:48,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:48,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:48,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719897718] [2025-03-03 09:44:48,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719897718] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062756101] [2025-03-03 09:44:48,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:48,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:48,530 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:48,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-03 09:44:48,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-03 09:44:48,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-03 09:44:48,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:48,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:48,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-03 09:44:48,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:44:48,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:44:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062756101] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:48,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:48,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2025-03-03 09:44:48,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802470712] [2025-03-03 09:44:48,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:48,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-03 09:44:48,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:48,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-03 09:44:48,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2025-03-03 09:44:48,999 INFO L87 Difference]: Start difference. First operand 304 states and 504 transitions. Second operand has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:44:49,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:49,744 INFO L93 Difference]: Finished difference Result 728 states and 1178 transitions. [2025-03-03 09:44:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 09:44:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2025-03-03 09:44:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:49,747 INFO L225 Difference]: With dead ends: 728 [2025-03-03 09:44:49,747 INFO L226 Difference]: Without dead ends: 445 [2025-03-03 09:44:49,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=953, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:44:49,748 INFO L435 NwaCegarLoop]: 128 mSDtfsCounter, 472 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:49,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1481 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:44:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2025-03-03 09:44:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 309. [2025-03-03 09:44:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 282 states have (on average 1.3617021276595744) internal successors, (384), 280 states have internal predecessors, (384), 17 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (109), 25 states have call predecessors, (109), 16 states have call successors, (109) [2025-03-03 09:44:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 510 transitions. [2025-03-03 09:44:49,776 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 510 transitions. Word has length 88 [2025-03-03 09:44:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:49,777 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 510 transitions. [2025-03-03 09:44:49,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.838709677419355) internal successors, (150), 31 states have internal predecessors, (150), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-03-03 09:44:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 510 transitions. [2025-03-03 09:44:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-03 09:44:49,779 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:49,779 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:49,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-03 09:44:49,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:49,981 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:49,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1444822990, now seen corresponding path program 1 times [2025-03-03 09:44:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:49,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768853747] [2025-03-03 09:44:49,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:49,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:49,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-03 09:44:50,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-03 09:44:50,001 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:50,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 09:44:50,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768853747] [2025-03-03 09:44:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768853747] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748124441] [2025-03-03 09:44:50,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:50,112 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:50,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-03 09:44:50,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-03 09:44:50,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-03 09:44:50,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:50,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:50,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 09:44:50,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 09:44:50,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-03 09:44:50,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748124441] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:50,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:50,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2025-03-03 09:44:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991505197] [2025-03-03 09:44:50,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:50,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:44:50,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:50,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:44:50,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:44:50,293 INFO L87 Difference]: Start difference. First operand 309 states and 510 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 12 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 09:44:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:50,386 INFO L93 Difference]: Finished difference Result 323 states and 523 transitions. [2025-03-03 09:44:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:44:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 12 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 89 [2025-03-03 09:44:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:50,388 INFO L225 Difference]: With dead ends: 323 [2025-03-03 09:44:50,388 INFO L226 Difference]: Without dead ends: 272 [2025-03-03 09:44:50,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:44:50,389 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 4 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:50,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 662 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2025-03-03 09:44:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2025-03-03 09:44:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 247 states have (on average 1.368421052631579) internal successors, (338), 247 states have internal predecessors, (338), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 21 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-03 09:44:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 439 transitions. [2025-03-03 09:44:50,409 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 439 transitions. Word has length 89 [2025-03-03 09:44:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:50,410 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 439 transitions. [2025-03-03 09:44:50,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 12 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 09:44:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 439 transitions. [2025-03-03 09:44:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-03 09:44:50,412 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:50,412 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:50,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:50,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-03 09:44:50,613 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:50,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:50,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1894405029, now seen corresponding path program 1 times [2025-03-03 09:44:50,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:50,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036453518] [2025-03-03 09:44:50,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:50,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:50,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 91 statements into 1 equivalence classes. [2025-03-03 09:44:50,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 09:44:50,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:50,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036453518] [2025-03-03 09:44:50,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036453518] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186621923] [2025-03-03 09:44:50,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:50,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:50,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:50,857 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:50,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-03 09:44:50,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 91 statements into 1 equivalence classes. [2025-03-03 09:44:51,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 09:44:51,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:51,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:51,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-03 09:44:51,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2025-03-03 09:44:51,187 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186621923] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:51,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:51,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2025-03-03 09:44:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991535775] [2025-03-03 09:44:51,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:51,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:44:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:51,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:44:51,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:44:51,188 INFO L87 Difference]: Start difference. First operand 272 states and 439 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:51,226 INFO L93 Difference]: Finished difference Result 293 states and 460 transitions. [2025-03-03 09:44:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:44:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 91 [2025-03-03 09:44:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:51,228 INFO L225 Difference]: With dead ends: 293 [2025-03-03 09:44:51,228 INFO L226 Difference]: Without dead ends: 279 [2025-03-03 09:44:51,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2025-03-03 09:44:51,229 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 0 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:51,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 322 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2025-03-03 09:44:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2025-03-03 09:44:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 236 states have (on average 1.38135593220339) internal successors, (326), 237 states have internal predecessors, (326), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-03 09:44:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 427 transitions. [2025-03-03 09:44:51,248 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 427 transitions. Word has length 91 [2025-03-03 09:44:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:51,248 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 427 transitions. [2025-03-03 09:44:51,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 427 transitions. [2025-03-03 09:44:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-03-03 09:44:51,249 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:51,249 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:51,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:51,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-03 09:44:51,450 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:51,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -77890347, now seen corresponding path program 1 times [2025-03-03 09:44:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:51,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474825476] [2025-03-03 09:44:51,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:51,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 91 statements into 1 equivalence classes. [2025-03-03 09:44:51,467 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 91 of 91 statements. [2025-03-03 09:44:51,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:51,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-03-03 09:44:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474825476] [2025-03-03 09:44:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474825476] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:51,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-03 09:44:51,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-03 09:44:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488195529] [2025-03-03 09:44:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:51,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-03 09:44:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:51,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-03 09:44:51,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:44:51,514 INFO L87 Difference]: Start difference. First operand 261 states and 427 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:51,555 INFO L93 Difference]: Finished difference Result 281 states and 447 transitions. [2025-03-03 09:44:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-03 09:44:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 91 [2025-03-03 09:44:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:51,557 INFO L225 Difference]: With dead ends: 281 [2025-03-03 09:44:51,557 INFO L226 Difference]: Without dead ends: 269 [2025-03-03 09:44:51,558 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-03 09:44:51,558 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:51,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 337 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:44:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2025-03-03 09:44:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2025-03-03 09:44:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 243 states have (on average 1.3580246913580247) internal successors, (330), 244 states have internal predecessors, (330), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-03 09:44:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 431 transitions. [2025-03-03 09:44:51,574 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 431 transitions. Word has length 91 [2025-03-03 09:44:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:51,574 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 431 transitions. [2025-03-03 09:44:51,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:44:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 431 transitions. [2025-03-03 09:44:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-03 09:44:51,576 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:51,576 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:51,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-03 09:44:51,576 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:51,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1520358006, now seen corresponding path program 1 times [2025-03-03 09:44:51,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:51,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167346983] [2025-03-03 09:44:51,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:51,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:51,581 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 09:44:51,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 09:44:51,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:51,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:44:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167346983] [2025-03-03 09:44:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167346983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208866547] [2025-03-03 09:44:51,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:51,829 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:51,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-03 09:44:51,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-03-03 09:44:52,012 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-03-03 09:44:52,012 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:52,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:52,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-03 09:44:52,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2025-03-03 09:44:52,100 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208866547] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:52,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:52,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 20 [2025-03-03 09:44:52,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878004972] [2025-03-03 09:44:52,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:52,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-03 09:44:52,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:52,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-03 09:44:52,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:44:52,101 INFO L87 Difference]: Start difference. First operand 268 states and 431 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:52,192 INFO L93 Difference]: Finished difference Result 309 states and 477 transitions. [2025-03-03 09:44:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 09:44:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 92 [2025-03-03 09:44:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:52,193 INFO L225 Difference]: With dead ends: 309 [2025-03-03 09:44:52,193 INFO L226 Difference]: Without dead ends: 278 [2025-03-03 09:44:52,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2025-03-03 09:44:52,194 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 47 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:52,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 607 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2025-03-03 09:44:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 268. [2025-03-03 09:44:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 243 states have (on average 1.353909465020576) internal successors, (329), 244 states have internal predecessors, (329), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-03 09:44:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 430 transitions. [2025-03-03 09:44:52,211 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 430 transitions. Word has length 92 [2025-03-03 09:44:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:52,211 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 430 transitions. [2025-03-03 09:44:52,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 430 transitions. [2025-03-03 09:44:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-03 09:44:52,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:52,212 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:52,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:52,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-03-03 09:44:52,413 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:52,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1252249248, now seen corresponding path program 1 times [2025-03-03 09:44:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750037993] [2025-03-03 09:44:52,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:52,418 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-03-03 09:44:52,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-03-03 09:44:52,433 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:52,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 09:44:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750037993] [2025-03-03 09:44:52,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750037993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:52,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662707972] [2025-03-03 09:44:52,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:52,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:52,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:52,503 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:52,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-03 09:44:52,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-03-03 09:44:52,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-03-03 09:44:52,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:52,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:52,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-03 09:44:52,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 09:44:52,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 09:44:52,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662707972] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:52,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:52,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2025-03-03 09:44:52,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165231699] [2025-03-03 09:44:52,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:52,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-03 09:44:52,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:52,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-03 09:44:52,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:44:52,689 INFO L87 Difference]: Start difference. First operand 268 states and 430 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 12 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 09:44:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:52,772 INFO L93 Difference]: Finished difference Result 315 states and 484 transitions. [2025-03-03 09:44:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-03 09:44:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 12 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 93 [2025-03-03 09:44:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:52,774 INFO L225 Difference]: With dead ends: 315 [2025-03-03 09:44:52,774 INFO L226 Difference]: Without dead ends: 280 [2025-03-03 09:44:52,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-03 09:44:52,775 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 47 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:52,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 838 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2025-03-03 09:44:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 268. [2025-03-03 09:44:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 243 states have (on average 1.345679012345679) internal successors, (327), 244 states have internal predecessors, (327), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-03 09:44:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 428 transitions. [2025-03-03 09:44:52,791 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 428 transitions. Word has length 93 [2025-03-03 09:44:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:52,792 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 428 transitions. [2025-03-03 09:44:52,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 12 states have internal predecessors, (69), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-03 09:44:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 428 transitions. [2025-03-03 09:44:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-03-03 09:44:52,794 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:52,794 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:52,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:52,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:52,994 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:52,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2096721119, now seen corresponding path program 1 times [2025-03-03 09:44:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012957037] [2025-03-03 09:44:52,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:52,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-03-03 09:44:53,011 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-03-03 09:44:53,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:53,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:53,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012957037] [2025-03-03 09:44:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012957037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881209062] [2025-03-03 09:44:53,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:53,200 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-03 09:44:53,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-03-03 09:44:53,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-03-03 09:44:53,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:53,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:53,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-03 09:44:53,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 09:44:53,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-03-03 09:44:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881209062] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:53,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:53,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2025-03-03 09:44:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474274011] [2025-03-03 09:44:53,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:53,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-03 09:44:53,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:53,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-03 09:44:53,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2025-03-03 09:44:53,533 INFO L87 Difference]: Start difference. First operand 268 states and 428 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 09:44:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:54,126 INFO L93 Difference]: Finished difference Result 573 states and 910 transitions. [2025-03-03 09:44:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-03 09:44:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 93 [2025-03-03 09:44:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:54,128 INFO L225 Difference]: With dead ends: 573 [2025-03-03 09:44:54,128 INFO L226 Difference]: Without dead ends: 333 [2025-03-03 09:44:54,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2025-03-03 09:44:54,129 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 276 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:54,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1440 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-03 09:44:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2025-03-03 09:44:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 268. [2025-03-03 09:44:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 243 states have (on average 1.3415637860082306) internal successors, (326), 244 states have internal predecessors, (326), 15 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (86), 20 states have call predecessors, (86), 14 states have call successors, (86) [2025-03-03 09:44:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 427 transitions. [2025-03-03 09:44:54,158 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 427 transitions. Word has length 93 [2025-03-03 09:44:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:54,158 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 427 transitions. [2025-03-03 09:44:54,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 23 states have internal predecessors, (97), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-03 09:44:54,159 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 427 transitions. [2025-03-03 09:44:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-03-03 09:44:54,160 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:54,160 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:54,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-03 09:44:54,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:54,361 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:54,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1111705413, now seen corresponding path program 1 times [2025-03-03 09:44:54,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:54,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782124578] [2025-03-03 09:44:54,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:54,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:54,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-03 09:44:54,378 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 09:44:54,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:54,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 118 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-03 09:44:54,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782124578] [2025-03-03 09:44:54,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782124578] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:54,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536824116] [2025-03-03 09:44:54,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:54,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:54,602 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:54,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-03 09:44:54,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-03-03 09:44:54,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-03-03 09:44:54,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:54,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:54,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-03 09:44:54,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-03-03 09:44:54,921 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:44:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536824116] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:44:54,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:44:54,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2025-03-03 09:44:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351881221] [2025-03-03 09:44:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:44:54,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-03 09:44:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:54,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-03 09:44:54,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2025-03-03 09:44:54,923 INFO L87 Difference]: Start difference. First operand 268 states and 427 transitions. Second operand has 11 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:44:55,065 INFO L93 Difference]: Finished difference Result 307 states and 471 transitions. [2025-03-03 09:44:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-03 09:44:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 97 [2025-03-03 09:44:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:44:55,067 INFO L225 Difference]: With dead ends: 307 [2025-03-03 09:44:55,067 INFO L226 Difference]: Without dead ends: 270 [2025-03-03 09:44:55,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2025-03-03 09:44:55,067 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 48 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:44:55,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 861 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:44:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2025-03-03 09:44:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 256. [2025-03-03 09:44:55,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 233 states have (on average 1.3562231759656653) internal successors, (316), 235 states have internal predecessors, (316), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2025-03-03 09:44:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 400 transitions. [2025-03-03 09:44:55,082 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 400 transitions. Word has length 97 [2025-03-03 09:44:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:44:55,083 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 400 transitions. [2025-03-03 09:44:55,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-03-03 09:44:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 400 transitions. [2025-03-03 09:44:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-03-03 09:44:55,084 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:44:55,084 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:44:55,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-03-03 09:44:55,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:55,288 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:44:55,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:44:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash -546191538, now seen corresponding path program 1 times [2025-03-03 09:44:55,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:44:55,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581175361] [2025-03-03 09:44:55,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:55,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:44:55,295 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 09:44:55,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 09:44:55,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:55,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 124 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:44:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:44:55,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581175361] [2025-03-03 09:44:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581175361] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:44:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197321144] [2025-03-03 09:44:55,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:44:55,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:44:55,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:44:55,529 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:44:55,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-03 09:44:55,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-03-03 09:44:55,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-03-03 09:44:55,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:44:55,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:44:55,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-03 09:44:55,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:44:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2025-03-03 09:44:56,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:44:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2025-03-03 09:44:57,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197321144] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:44:57,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:44:57,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2025-03-03 09:44:57,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709683795] [2025-03-03 09:44:57,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:44:57,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-03 09:44:57,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:44:57,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-03 09:44:57,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2025-03-03 09:44:57,462 INFO L87 Difference]: Start difference. First operand 256 states and 400 transitions. Second operand has 42 states, 40 states have (on average 3.625) internal successors, (145), 38 states have internal predecessors, (145), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-03 09:45:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:01,029 INFO L93 Difference]: Finished difference Result 596 states and 916 transitions. [2025-03-03 09:45:01,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-03-03 09:45:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 3.625) internal successors, (145), 38 states have internal predecessors, (145), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 98 [2025-03-03 09:45:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:01,031 INFO L225 Difference]: With dead ends: 596 [2025-03-03 09:45:01,031 INFO L226 Difference]: Without dead ends: 366 [2025-03-03 09:45:01,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=758, Invalid=8944, Unknown=0, NotChecked=0, Total=9702 [2025-03-03 09:45:01,033 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 423 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 3467 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:01,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 2764 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3467 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-03 09:45:01,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2025-03-03 09:45:01,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 261. [2025-03-03 09:45:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 240 states have internal predecessors, (321), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2025-03-03 09:45:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 405 transitions. [2025-03-03 09:45:01,050 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 405 transitions. Word has length 98 [2025-03-03 09:45:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:01,050 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 405 transitions. [2025-03-03 09:45:01,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 3.625) internal successors, (145), 38 states have internal predecessors, (145), 5 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-03-03 09:45:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 405 transitions. [2025-03-03 09:45:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2025-03-03 09:45:01,051 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:01,051 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:01,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2025-03-03 09:45:01,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-03 09:45:01,252 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:01,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1677766119, now seen corresponding path program 1 times [2025-03-03 09:45:01,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:45:01,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384305998] [2025-03-03 09:45:01,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:45:01,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:45:01,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-03-03 09:45:01,269 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-03-03 09:45:01,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:01,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 151 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:45:01,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:45:01,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384305998] [2025-03-03 09:45:01,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384305998] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:45:01,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044698442] [2025-03-03 09:45:01,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:45:01,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:01,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:01,507 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:01,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-03 09:45:01,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 101 statements into 1 equivalence classes. [2025-03-03 09:45:01,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 101 of 101 statements. [2025-03-03 09:45:01,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:01,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:01,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-03 09:45:01,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2025-03-03 09:45:01,856 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:45:01,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044698442] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:45:01,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:45:01,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 20 [2025-03-03 09:45:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085536395] [2025-03-03 09:45:01,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:45:01,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-03 09:45:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:45:01,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-03 09:45:01,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:45:01,857 INFO L87 Difference]: Start difference. First operand 261 states and 405 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:45:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:01,918 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2025-03-03 09:45:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-03 09:45:01,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 101 [2025-03-03 09:45:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:01,920 INFO L225 Difference]: With dead ends: 312 [2025-03-03 09:45:01,920 INFO L226 Difference]: Without dead ends: 265 [2025-03-03 09:45:01,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2025-03-03 09:45:01,920 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 8 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:01,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 574 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-03 09:45:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2025-03-03 09:45:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2025-03-03 09:45:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 240 states have (on average 1.3458333333333334) internal successors, (323), 242 states have internal predecessors, (323), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2025-03-03 09:45:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 407 transitions. [2025-03-03 09:45:01,935 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 407 transitions. Word has length 101 [2025-03-03 09:45:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:01,935 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 407 transitions. [2025-03-03 09:45:01,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:45:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 407 transitions. [2025-03-03 09:45:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-03 09:45:01,937 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:01,937 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:01,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-03-03 09:45:02,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-03-03 09:45:02,137 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:02,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2011552907, now seen corresponding path program 2 times [2025-03-03 09:45:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:45:02,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89138439] [2025-03-03 09:45:02,138 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:45:02,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:45:02,142 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 102 statements into 2 equivalence classes. [2025-03-03 09:45:02,158 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 09:45:02,158 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:45:02,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 4 proven. 369 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:45:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:45:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89138439] [2025-03-03 09:45:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89138439] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:45:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778513909] [2025-03-03 09:45:02,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-03 09:45:02,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:02,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:02,534 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:02,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-03 09:45:02,576 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 102 statements into 2 equivalence classes. [2025-03-03 09:45:02,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-03 09:45:02,597 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-03 09:45:02,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:02,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-03-03 09:45:02,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 10 proven. 369 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-03 09:45:03,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 4 proven. 369 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:45:04,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778513909] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:04,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:45:04,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 28] total 74 [2025-03-03 09:45:04,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537913470] [2025-03-03 09:45:04,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:04,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-03 09:45:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:45:04,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-03 09:45:04,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=4911, Unknown=0, NotChecked=0, Total=5402 [2025-03-03 09:45:04,559 INFO L87 Difference]: Start difference. First operand 263 states and 407 transitions. Second operand has 74 states, 74 states have (on average 3.027027027027027) internal successors, (224), 70 states have internal predecessors, (224), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:45:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:20,876 INFO L93 Difference]: Finished difference Result 1120 states and 1791 transitions. [2025-03-03 09:45:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2025-03-03 09:45:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.027027027027027) internal successors, (224), 70 states have internal predecessors, (224), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2025-03-03 09:45:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:20,880 INFO L225 Difference]: With dead ends: 1120 [2025-03-03 09:45:20,880 INFO L226 Difference]: Without dead ends: 861 [2025-03-03 09:45:20,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17930 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=9579, Invalid=50691, Unknown=0, NotChecked=0, Total=60270 [2025-03-03 09:45:20,885 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 5598 mSDsluCounter, 4303 mSDsCounter, 0 mSdLazyCounter, 10332 mSolverCounterSat, 1894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5622 SdHoareTripleChecker+Valid, 4410 SdHoareTripleChecker+Invalid, 12226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1894 IncrementalHoareTripleChecker+Valid, 10332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:20,885 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5622 Valid, 4410 Invalid, 12226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1894 Valid, 10332 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2025-03-03 09:45:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2025-03-03 09:45:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 298. [2025-03-03 09:45:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 275 states have (on average 1.3890909090909092) internal successors, (382), 277 states have internal predecessors, (382), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2025-03-03 09:45:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 466 transitions. [2025-03-03 09:45:20,913 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 466 transitions. Word has length 102 [2025-03-03 09:45:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:20,913 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 466 transitions. [2025-03-03 09:45:20,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.027027027027027) internal successors, (224), 70 states have internal predecessors, (224), 4 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2025-03-03 09:45:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 466 transitions. [2025-03-03 09:45:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2025-03-03 09:45:20,914 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:20,914 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:20,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-03 09:45:21,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:21,115 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:21,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 965141766, now seen corresponding path program 3 times [2025-03-03 09:45:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:45:21,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962267163] [2025-03-03 09:45:21,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:45:21,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:45:21,120 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 116 statements into 26 equivalence classes. [2025-03-03 09:45:21,140 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) and asserted 116 of 116 statements. [2025-03-03 09:45:21,140 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2025-03-03 09:45:21,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:45:21,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:45:21,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962267163] [2025-03-03 09:45:21,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962267163] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:45:21,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254420204] [2025-03-03 09:45:21,526 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-03 09:45:21,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:21,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:21,528 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:21,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-03 09:45:21,565 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 116 statements into 26 equivalence classes. [2025-03-03 09:45:21,605 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) and asserted 116 of 116 statements. [2025-03-03 09:45:21,605 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2025-03-03 09:45:21,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:21,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-03 09:45:21,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:45:21,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-03 09:45:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254420204] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:22,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:45:22,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2025-03-03 09:45:22,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536456873] [2025-03-03 09:45:22,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:22,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2025-03-03 09:45:22,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:45:22,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2025-03-03 09:45:22,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2025-03-03 09:45:22,689 INFO L87 Difference]: Start difference. First operand 298 states and 466 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:45:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:23,183 INFO L93 Difference]: Finished difference Result 916 states and 1333 transitions. [2025-03-03 09:45:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-03 09:45:23,183 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2025-03-03 09:45:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:23,186 INFO L225 Difference]: With dead ends: 916 [2025-03-03 09:45:23,186 INFO L226 Difference]: Without dead ends: 659 [2025-03-03 09:45:23,187 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1917, Invalid=3633, Unknown=0, NotChecked=0, Total=5550 [2025-03-03 09:45:23,187 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 1345 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:23,187 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 955 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-03 09:45:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2025-03-03 09:45:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 336. [2025-03-03 09:45:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 313 states have (on average 1.4217252396166133) internal successors, (445), 315 states have internal predecessors, (445), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2025-03-03 09:45:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 529 transitions. [2025-03-03 09:45:23,214 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 529 transitions. Word has length 116 [2025-03-03 09:45:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:23,214 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 529 transitions. [2025-03-03 09:45:23,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-03 09:45:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 529 transitions. [2025-03-03 09:45:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-03 09:45:23,215 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:23,215 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:23,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-03 09:45:23,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-03 09:45:23,415 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:23,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1573051060, now seen corresponding path program 1 times [2025-03-03 09:45:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:45:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112537200] [2025-03-03 09:45:23,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:45:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:45:23,421 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 124 statements into 1 equivalence classes. [2025-03-03 09:45:23,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 124 of 124 statements. [2025-03-03 09:45:23,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:23,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 4 proven. 424 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-03 09:45:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:45:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112537200] [2025-03-03 09:45:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112537200] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:45:23,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057273041] [2025-03-03 09:45:23,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:45:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:23,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:23,913 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:23,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-03 09:45:23,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 124 statements into 1 equivalence classes. [2025-03-03 09:45:24,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 124 of 124 statements. [2025-03-03 09:45:24,323 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:24,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:24,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-03 09:45:24,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2025-03-03 09:45:24,519 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-03 09:45:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057273041] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-03 09:45:24,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-03 09:45:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [22] total 30 [2025-03-03 09:45:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253206584] [2025-03-03 09:45:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-03 09:45:24,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-03 09:45:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:45:24,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-03 09:45:24,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2025-03-03 09:45:24,520 INFO L87 Difference]: Start difference. First operand 336 states and 529 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:45:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-03 09:45:24,613 INFO L93 Difference]: Finished difference Result 367 states and 568 transitions. [2025-03-03 09:45:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-03 09:45:24,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 124 [2025-03-03 09:45:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-03 09:45:24,615 INFO L225 Difference]: With dead ends: 367 [2025-03-03 09:45:24,615 INFO L226 Difference]: Without dead ends: 355 [2025-03-03 09:45:24,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2025-03-03 09:45:24,615 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 24 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-03 09:45:24,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 554 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-03 09:45:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2025-03-03 09:45:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 340. [2025-03-03 09:45:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 317 states have (on average 1.4195583596214512) internal successors, (450), 319 states have internal predecessors, (450), 13 states have call successors, (13), 3 states have call predecessors, (13), 9 states have return successors, (71), 17 states have call predecessors, (71), 12 states have call successors, (71) [2025-03-03 09:45:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 534 transitions. [2025-03-03 09:45:24,646 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 534 transitions. Word has length 124 [2025-03-03 09:45:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-03 09:45:24,646 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 534 transitions. [2025-03-03 09:45:24,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2025-03-03 09:45:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 534 transitions. [2025-03-03 09:45:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-03-03 09:45:24,647 INFO L210 NwaCegarLoop]: Found error trace [2025-03-03 09:45:24,647 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-03 09:45:24,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-03-03 09:45:24,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-03-03 09:45:24,847 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-03 09:45:24,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-03 09:45:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1806092226, now seen corresponding path program 1 times [2025-03-03 09:45:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-03 09:45:24,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108256576] [2025-03-03 09:45:24,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:45:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-03 09:45:24,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-03-03 09:45:24,871 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-03-03 09:45:24,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:24,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 4 proven. 430 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2025-03-03 09:45:25,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-03 09:45:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108256576] [2025-03-03 09:45:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108256576] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-03 09:45:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122869913] [2025-03-03 09:45:25,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-03 09:45:25,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-03 09:45:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-03 09:45:25,297 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-03 09:45:25,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-03-03 09:45:25,342 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-03-03 09:45:25,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-03-03 09:45:25,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-03 09:45:25,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-03 09:45:25,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 109 conjuncts are in the unsatisfiable core [2025-03-03 09:45:25,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-03 09:45:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 12 proven. 426 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-03 09:45:27,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-03 09:45:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 30 proven. 425 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-03 09:45:31,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122869913] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-03 09:45:31,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-03 09:45:31,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38, 44] total 100 [2025-03-03 09:45:31,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397203592] [2025-03-03 09:45:31,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-03 09:45:31,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2025-03-03 09:45:31,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-03 09:45:31,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2025-03-03 09:45:31,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=9289, Unknown=0, NotChecked=0, Total=9900 [2025-03-03 09:45:31,227 INFO L87 Difference]: Start difference. First operand 340 states and 534 transitions. Second operand has 100 states, 96 states have (on average 3.0729166666666665) internal successors, (295), 94 states have internal predecessors, (295), 7 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11)