./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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/array-lopstr16/flag_loopdep_simple.i -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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-16 13:52:25,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-16 13:52:25,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-16 13:52:25,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-16 13:52:25,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-16 13:52:25,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-16 13:52:25,167 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-16 13:52:25,167 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-16 13:52:25,168 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-16 13:52:25,168 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-16 13:52:25,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-16 13:52:25,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-16 13:52:25,168 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-16 13:52:25,168 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-16 13:52:25,169 INFO L153 SettingsManager]: * Use SBE=true [2025-03-16 13:52:25,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-16 13:52:25,169 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-16 13:52:25,169 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-16 13:52:25,170 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-16 13:52:25,171 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:52:25,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-16 13:52:25,171 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-16 13:52:25,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-16 13:52:25,172 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 -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2025-03-16 13:52:25,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-16 13:52:25,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-16 13:52:25,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-16 13:52:25,408 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-16 13:52:25,408 INFO L274 PluginConnector]: CDTParser initialized [2025-03-16 13:52:25,409 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2025-03-16 13:52:26,534 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af38b7bea/75a31ec0d83a471098133cca8cc764d3/FLAGcaa6bcc27 [2025-03-16 13:52:26,780 INFO L384 CDTParser]: Found 1 translation units. [2025-03-16 13:52:26,781 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2025-03-16 13:52:26,797 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af38b7bea/75a31ec0d83a471098133cca8cc764d3/FLAGcaa6bcc27 [2025-03-16 13:52:26,812 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af38b7bea/75a31ec0d83a471098133cca8cc764d3 [2025-03-16 13:52:26,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-16 13:52:26,816 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-16 13:52:26,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-16 13:52:26,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-16 13:52:26,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-16 13:52:26,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:26,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47167c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26, skipping insertion in model container [2025-03-16 13:52:26,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:26,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-16 13:52:26,942 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/array-lopstr16/flag_loopdep_simple.i[812,825] [2025-03-16 13:52:26,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:52:26,968 INFO L200 MainTranslator]: Completed pre-run [2025-03-16 13:52:26,977 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/array-lopstr16/flag_loopdep_simple.i[812,825] [2025-03-16 13:52:26,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-16 13:52:26,995 INFO L204 MainTranslator]: Completed translation [2025-03-16 13:52:26,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26 WrapperNode [2025-03-16 13:52:26,996 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-16 13:52:26,998 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-16 13:52:26,998 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-16 13:52:26,998 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-16 13:52:27,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,022 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2025-03-16 13:52:27,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-16 13:52:27,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-16 13:52:27,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-16 13:52:27,024 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-16 13:52:27,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,030 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,039 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-16 13:52:27,040 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,043 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,043 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,044 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,045 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-16 13:52:27,046 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-16 13:52:27,046 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-16 13:52:27,046 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-16 13:52:27,047 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (1/1) ... [2025-03-16 13:52:27,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-16 13:52:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:27,073 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) [2025-03-16 13:52:27,076 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 [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-16 13:52:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-16 13:52:27,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-16 13:52:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-16 13:52:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-16 13:52:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-16 13:52:27,145 INFO L256 CfgBuilder]: Building ICFG [2025-03-16 13:52:27,146 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-16 13:52:27,239 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L29: call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset; [2025-03-16 13:52:27,244 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2025-03-16 13:52:27,244 INFO L307 CfgBuilder]: Performing block encoding [2025-03-16 13:52:27,252 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-16 13:52:27,253 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-16 13:52:27,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:52:27 BoogieIcfgContainer [2025-03-16 13:52:27,254 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-16 13:52:27,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-16 13:52:27,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-16 13:52:27,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-16 13:52:27,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.03 01:52:26" (1/3) ... [2025-03-16 13:52:27,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe26c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:52:27, skipping insertion in model container [2025-03-16 13:52:27,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.03 01:52:26" (2/3) ... [2025-03-16 13:52:27,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42fe26c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.03 01:52:27, skipping insertion in model container [2025-03-16 13:52:27,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.03 01:52:27" (3/3) ... [2025-03-16 13:52:27,261 INFO L128 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2025-03-16 13:52:27,271 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-16 13:52:27,272 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG flag_loopdep_simple.i that has 1 procedures, 15 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-16 13:52:27,308 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-16 13:52:27,315 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;@5a78e436, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-16 13:52:27,315 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-16 13:52:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-16 13:52:27,321 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:27,322 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:27,322 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:27,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1454254677, now seen corresponding path program 1 times [2025-03-16 13:52:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:27,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985811309] [2025-03-16 13:52:27,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:27,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:27,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-16 13:52:27,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-16 13:52:27,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:27,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-16 13:52:27,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985811309] [2025-03-16 13:52:27,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985811309] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:52:27,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:52:27,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:52:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769365976] [2025-03-16 13:52:27,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:52:27,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:52:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:27,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:52:27,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:52:27,585 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:27,603 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2025-03-16 13:52:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:52:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-16 13:52:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:27,610 INFO L225 Difference]: With dead ends: 29 [2025-03-16 13:52:27,611 INFO L226 Difference]: Without dead ends: 13 [2025-03-16 13:52:27,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:52:27,617 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:27,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-03-16 13:52:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-03-16 13:52:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2025-03-16 13:52:27,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2025-03-16 13:52:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:27,643 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2025-03-16 13:52:27,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2025-03-16 13:52:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-16 13:52:27,644 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:27,645 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:27,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-16 13:52:27,645 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:27,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1100587528, now seen corresponding path program 1 times [2025-03-16 13:52:27,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:27,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722273965] [2025-03-16 13:52:27,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:27,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-16 13:52:27,669 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-16 13:52:27,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:27,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:52:27,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:27,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722273965] [2025-03-16 13:52:27,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722273965] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:52:27,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:52:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:52:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112707790] [2025-03-16 13:52:27,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:52:27,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:52:27,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:27,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:52:27,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:52:27,710 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:27,741 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2025-03-16 13:52:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:52:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-16 13:52:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:27,742 INFO L225 Difference]: With dead ends: 30 [2025-03-16 13:52:27,742 INFO L226 Difference]: Without dead ends: 23 [2025-03-16 13:52:27,742 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 [2025-03-16 13:52:27,743 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:27,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-16 13:52:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2025-03-16 13:52:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2025-03-16 13:52:27,745 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2025-03-16 13:52:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:27,745 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2025-03-16 13:52:27,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2025-03-16 13:52:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-16 13:52:27,748 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:27,748 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:27,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-16 13:52:27,748 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:27,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2067061779, now seen corresponding path program 1 times [2025-03-16 13:52:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42967892] [2025-03-16 13:52:27,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:27,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:52:27,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:52:27,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:27,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:52:27,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42967892] [2025-03-16 13:52:27,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42967892] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:27,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212274275] [2025-03-16 13:52:27,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:27,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:27,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:27,821 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) [2025-03-16 13:52:27,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-16 13:52:27,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-16 13:52:27,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-16 13:52:27,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:27,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:27,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-16 13:52:27,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:52:27,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-16 13:52:27,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212274275] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:27,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:27,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2025-03-16 13:52:27,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914027005] [2025-03-16 13:52:27,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:27,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-16 13:52:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:27,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-16 13:52:27,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:52:27,966 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:28,015 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2025-03-16 13:52:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-16 13:52:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-03-16 13:52:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:28,015 INFO L225 Difference]: With dead ends: 47 [2025-03-16 13:52:28,015 INFO L226 Difference]: Without dead ends: 36 [2025-03-16 13:52:28,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-16 13:52:28,017 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:28,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-03-16 13:52:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2025-03-16 13:52:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2025-03-16 13:52:28,020 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2025-03-16 13:52:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:28,020 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2025-03-16 13:52:28,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2025-03-16 13:52:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-16 13:52:28,021 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:28,021 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:28,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-16 13:52:28,222 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 [2025-03-16 13:52:28,222 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:28,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 220069515, now seen corresponding path program 2 times [2025-03-16 13:52:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:28,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950888092] [2025-03-16 13:52:28,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:28,244 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-16 13:52:28,266 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:52:28,266 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:28,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:52:28,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:28,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950888092] [2025-03-16 13:52:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950888092] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:28,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447309707] [2025-03-16 13:52:28,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:28,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:28,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:28,415 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) [2025-03-16 13:52:28,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-16 13:52:28,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-16 13:52:28,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-16 13:52:28,464 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:28,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:28,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:52:28,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:52:28,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-16 13:52:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447309707] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:28,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:28,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-16 13:52:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649435430] [2025-03-16 13:52:28,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:28,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:52:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:28,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:52:28,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:52:28,618 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:28,638 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2025-03-16 13:52:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:52:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-03-16 13:52:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:28,639 INFO L225 Difference]: With dead ends: 40 [2025-03-16 13:52:28,639 INFO L226 Difference]: Without dead ends: 26 [2025-03-16 13:52:28,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=146, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:52:28,641 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:28,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-16 13:52:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-03-16 13:52:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2025-03-16 13:52:28,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2025-03-16 13:52:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:28,646 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2025-03-16 13:52:28,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2025-03-16 13:52:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-16 13:52:28,646 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:28,646 INFO L218 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:28,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-16 13:52:28,847 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 [2025-03-16 13:52:28,847 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:28,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1232680085, now seen corresponding path program 3 times [2025-03-16 13:52:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:28,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238307654] [2025-03-16 13:52:28,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:28,860 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-16 13:52:28,878 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 23 statements. [2025-03-16 13:52:28,878 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:52:28,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2025-03-16 13:52:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238307654] [2025-03-16 13:52:29,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238307654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:29,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058435566] [2025-03-16 13:52:29,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:29,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:29,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:29,099 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) [2025-03-16 13:52:29,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-16 13:52:29,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-16 13:52:29,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 23 statements. [2025-03-16 13:52:29,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-16 13:52:29,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:29,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-16 13:52:29,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:52:29,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-16 13:52:29,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058435566] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:29,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:29,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2025-03-16 13:52:29,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918972821] [2025-03-16 13:52:29,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:29,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-16 13:52:29,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:29,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-16 13:52:29,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2025-03-16 13:52:29,222 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:29,415 INFO L93 Difference]: Finished difference Result 139 states and 175 transitions. [2025-03-16 13:52:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-16 13:52:29,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2025-03-16 13:52:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:29,417 INFO L225 Difference]: With dead ends: 139 [2025-03-16 13:52:29,417 INFO L226 Difference]: Without dead ends: 132 [2025-03-16 13:52:29,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:52:29,418 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:29,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 88 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2025-03-16 13:52:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 58. [2025-03-16 13:52:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 57 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2025-03-16 13:52:29,431 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 23 [2025-03-16 13:52:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:29,432 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2025-03-16 13:52:29,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2025-03-16 13:52:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-03-16 13:52:29,433 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:29,433 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:29,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-16 13:52:29,633 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 [2025-03-16 13:52:29,634 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:29,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1377528820, now seen corresponding path program 1 times [2025-03-16 13:52:29,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:29,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627633230] [2025-03-16 13:52:29,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:29,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-16 13:52:29,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-16 13:52:29,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:29,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2025-03-16 13:52:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627633230] [2025-03-16 13:52:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627633230] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:52:29,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:52:29,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-16 13:52:29,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379487622] [2025-03-16 13:52:29,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:52:29,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:52:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:29,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:52:29,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:52:29,693 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:29,702 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2025-03-16 13:52:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:52:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2025-03-16 13:52:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:29,704 INFO L225 Difference]: With dead ends: 85 [2025-03-16 13:52:29,704 INFO L226 Difference]: Without dead ends: 41 [2025-03-16 13:52:29,704 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 [2025-03-16 13:52:29,704 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:29,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-16 13:52:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-03-16 13:52:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2025-03-16 13:52:29,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2025-03-16 13:52:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:29,714 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2025-03-16 13:52:29,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2025-03-16 13:52:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-03-16 13:52:29,714 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:29,714 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:29,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-16 13:52:29,715 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:29,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1600678796, now seen corresponding path program 1 times [2025-03-16 13:52:29,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:29,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880689273] [2025-03-16 13:52:29,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:29,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:29,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-16 13:52:29,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-16 13:52:29,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:29,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2025-03-16 13:52:29,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880689273] [2025-03-16 13:52:29,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880689273] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-16 13:52:29,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-16 13:52:29,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-16 13:52:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873275325] [2025-03-16 13:52:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-16 13:52:29,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-16 13:52:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:29,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-16 13:52:29,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:52:29,760 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:29,766 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2025-03-16 13:52:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-16 13:52:29,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2025-03-16 13:52:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:29,768 INFO L225 Difference]: With dead ends: 48 [2025-03-16 13:52:29,769 INFO L226 Difference]: Without dead ends: 41 [2025-03-16 13:52:29,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-16 13:52:29,769 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:29,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-03-16 13:52:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-03-16 13:52:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2025-03-16 13:52:29,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2025-03-16 13:52:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:29,776 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2025-03-16 13:52:29,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2025-03-16 13:52:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-03-16 13:52:29,776 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:29,776 INFO L218 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:29,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-16 13:52:29,777 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:29,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1834854201, now seen corresponding path program 1 times [2025-03-16 13:52:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731531454] [2025-03-16 13:52:29,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:29,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-16 13:52:29,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 13:52:29,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:29,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:52:30,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731531454] [2025-03-16 13:52:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731531454] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212004690] [2025-03-16 13:52:30,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-16 13:52:30,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:30,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:30,029 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) [2025-03-16 13:52:30,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-16 13:52:30,074 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-16 13:52:30,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-16 13:52:30,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:30,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:30,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-16 13:52:30,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:52:30,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:52:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212004690] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:30,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2025-03-16 13:52:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805492233] [2025-03-16 13:52:30,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:30,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-16 13:52:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:30,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-16 13:52:30,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:52:30,578 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:30,622 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2025-03-16 13:52:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-16 13:52:30,623 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2025-03-16 13:52:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:30,623 INFO L225 Difference]: With dead ends: 82 [2025-03-16 13:52:30,623 INFO L226 Difference]: Without dead ends: 53 [2025-03-16 13:52:30,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=650, Unknown=0, NotChecked=0, Total=1190 [2025-03-16 13:52:30,624 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:30,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-03-16 13:52:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-03-16 13:52:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2025-03-16 13:52:30,629 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2025-03-16 13:52:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:30,629 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2025-03-16 13:52:30,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2025-03-16 13:52:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-16 13:52:30,630 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:30,630 INFO L218 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:30,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-16 13:52:30,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:30,832 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:30,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1302150521, now seen corresponding path program 2 times [2025-03-16 13:52:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200994969] [2025-03-16 13:52:30,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:30,845 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-16 13:52:30,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 13:52:30,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:30,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:52:31,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200994969] [2025-03-16 13:52:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200994969] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284228652] [2025-03-16 13:52:31,364 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:31,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:31,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:31,367 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) [2025-03-16 13:52:31,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-16 13:52:31,418 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-16 13:52:31,448 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-16 13:52:31,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:31,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:31,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-16 13:52:31,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:52:31,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-03-16 13:52:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284228652] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:32,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:32,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2025-03-16 13:52:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853369891] [2025-03-16 13:52:32,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:32,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-03-16 13:52:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:32,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-03-16 13:52:32,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:52:32,416 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 71 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:32,475 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2025-03-16 13:52:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-03-16 13:52:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2025-03-16 13:52:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:32,478 INFO L225 Difference]: With dead ends: 106 [2025-03-16 13:52:32,478 INFO L226 Difference]: Without dead ends: 77 [2025-03-16 13:52:32,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2232, Invalid=2738, Unknown=0, NotChecked=0, Total=4970 [2025-03-16 13:52:32,480 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:32,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-16 13:52:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-16 13:52:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2025-03-16 13:52:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2025-03-16 13:52:32,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 52 [2025-03-16 13:52:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:32,486 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2025-03-16 13:52:32,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2025-03-16 13:52:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-16 13:52:32,487 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:32,487 INFO L218 NwaCegarLoop]: trace histogram [46, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-16 13:52:32,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-16 13:52:32,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:32,691 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:32,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1516128761, now seen corresponding path program 3 times [2025-03-16 13:52:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919578283] [2025-03-16 13:52:32,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:32,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 24 equivalence classes. [2025-03-16 13:52:32,742 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 37 of 76 statements. [2025-03-16 13:52:32,742 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:52:32,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2025-03-16 13:52:32,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:32,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919578283] [2025-03-16 13:52:32,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919578283] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:32,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735051398] [2025-03-16 13:52:32,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:32,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:32,932 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) [2025-03-16 13:52:32,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-16 13:52:33,000 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 76 statements into 24 equivalence classes. [2025-03-16 13:52:33,047 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 37 of 76 statements. [2025-03-16 13:52:33,047 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-16 13:52:33,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:33,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-16 13:52:33,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2025-03-16 13:52:33,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:33,323 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-16 13:52:33,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2025-03-16 13:52:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2025-03-16 13:52:33,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735051398] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:33,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:33,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-03-16 13:52:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519516348] [2025-03-16 13:52:33,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:33,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-16 13:52:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:33,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-16 13:52:33,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2025-03-16 13:52:33,331 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:33,416 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2025-03-16 13:52:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-16 13:52:33,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2025-03-16 13:52:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:33,417 INFO L225 Difference]: With dead ends: 86 [2025-03-16 13:52:33,417 INFO L226 Difference]: Without dead ends: 84 [2025-03-16 13:52:33,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2025-03-16 13:52:33,418 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:33,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-16 13:52:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2025-03-16 13:52:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2025-03-16 13:52:33,428 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2025-03-16 13:52:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:33,428 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2025-03-16 13:52:33,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2025-03-16 13:52:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-16 13:52:33,429 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:33,429 INFO L218 NwaCegarLoop]: trace histogram [46, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:52:33,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-16 13:52:33,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:33,630 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:33,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:33,630 INFO L85 PathProgramCache]: Analyzing trace with hash -590836565, now seen corresponding path program 4 times [2025-03-16 13:52:33,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:33,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322524312] [2025-03-16 13:52:33,630 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:33,652 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-16 13:52:33,666 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 13:52:33,666 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:33,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2025-03-16 13:52:33,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:33,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322524312] [2025-03-16 13:52:33,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322524312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:33,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654258966] [2025-03-16 13:52:33,833 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:52:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:33,834 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) [2025-03-16 13:52:33,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-16 13:52:33,918 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 81 statements into 2 equivalence classes. [2025-03-16 13:52:33,970 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 81 of 81 statements. [2025-03-16 13:52:33,970 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:52:33,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:33,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-16 13:52:33,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2025-03-16 13:52:34,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2025-03-16 13:52:34,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654258966] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:34,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:34,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-03-16 13:52:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654712134] [2025-03-16 13:52:34,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:34,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-16 13:52:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:34,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-16 13:52:34,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:52:34,089 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:34,182 INFO L93 Difference]: Finished difference Result 201 states and 211 transitions. [2025-03-16 13:52:34,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-16 13:52:34,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2025-03-16 13:52:34,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:34,183 INFO L225 Difference]: With dead ends: 201 [2025-03-16 13:52:34,183 INFO L226 Difference]: Without dead ends: 186 [2025-03-16 13:52:34,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-03-16 13:52:34,184 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 172 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:34,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 76 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2025-03-16 13:52:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2025-03-16 13:52:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2025-03-16 13:52:34,194 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 81 [2025-03-16 13:52:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:34,194 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2025-03-16 13:52:34,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2025-03-16 13:52:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2025-03-16 13:52:34,200 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:34,200 INFO L218 NwaCegarLoop]: trace histogram [46, 14, 14, 14, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:52:34,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-16 13:52:34,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:34,401 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:34,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1595216683, now seen corresponding path program 5 times [2025-03-16 13:52:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010639839] [2025-03-16 13:52:34,401 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:34,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:34,434 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 105 statements into 24 equivalence classes. [2025-03-16 13:52:34,578 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 105 of 105 statements. [2025-03-16 13:52:34,579 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-16 13:52:34,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2025-03-16 13:52:34,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010639839] [2025-03-16 13:52:34,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010639839] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:34,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124483580] [2025-03-16 13:52:34,858 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:52:34,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:34,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:34,860 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) [2025-03-16 13:52:34,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-16 13:52:34,947 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 105 statements into 24 equivalence classes. [2025-03-16 13:52:36,765 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 105 of 105 statements. [2025-03-16 13:52:36,766 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-03-16 13:52:36,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:36,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-16 13:52:36,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2025-03-16 13:52:36,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2025-03-16 13:52:37,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124483580] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:37,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:37,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2025-03-16 13:52:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603105973] [2025-03-16 13:52:37,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:37,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-16 13:52:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:37,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-16 13:52:37,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:52:37,095 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:37,284 INFO L93 Difference]: Finished difference Result 361 states and 379 transitions. [2025-03-16 13:52:37,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-16 13:52:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2025-03-16 13:52:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:37,286 INFO L225 Difference]: With dead ends: 361 [2025-03-16 13:52:37,286 INFO L226 Difference]: Without dead ends: 346 [2025-03-16 13:52:37,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2025-03-16 13:52:37,287 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 402 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:37,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 160 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2025-03-16 13:52:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 154. [2025-03-16 13:52:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2025-03-16 13:52:37,294 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 105 [2025-03-16 13:52:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:37,294 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2025-03-16 13:52:37,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 32 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2025-03-16 13:52:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2025-03-16 13:52:37,295 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:37,295 INFO L218 NwaCegarLoop]: trace histogram [46, 30, 30, 30, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-16 13:52:37,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-16 13:52:37,495 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,SelfDestructingSolverStorable11 [2025-03-16 13:52:37,496 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:37,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash 596353067, now seen corresponding path program 6 times [2025-03-16 13:52:37,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:37,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296355664] [2025-03-16 13:52:37,496 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:52:37,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:37,522 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 153 statements into 31 equivalence classes. [2025-03-16 13:52:37,556 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 83 of 153 statements. [2025-03-16 13:52:37,556 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-16 13:52:37,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 2188 trivial. 0 not checked. [2025-03-16 13:52:37,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:37,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296355664] [2025-03-16 13:52:37,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296355664] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:37,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565748333] [2025-03-16 13:52:37,822 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-16 13:52:37,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:37,824 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) [2025-03-16 13:52:37,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-16 13:52:37,922 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 153 statements into 31 equivalence classes. [2025-03-16 13:52:38,272 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) and asserted 83 of 153 statements. [2025-03-16 13:52:38,272 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2025-03-16 13:52:38,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:38,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-16 13:52:38,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 2188 trivial. 0 not checked. [2025-03-16 13:52:38,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:38,824 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-16 13:52:38,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2025-03-16 13:52:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 27 proven. 212 refuted. 0 times theorem prover too weak. 2188 trivial. 0 not checked. [2025-03-16 13:52:38,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565748333] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:38,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:38,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2025-03-16 13:52:38,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632479988] [2025-03-16 13:52:38,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:38,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-16 13:52:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:38,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-16 13:52:38,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2025-03-16 13:52:38,835 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:38,957 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2025-03-16 13:52:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-16 13:52:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2025-03-16 13:52:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:38,958 INFO L225 Difference]: With dead ends: 163 [2025-03-16 13:52:38,958 INFO L226 Difference]: Without dead ends: 161 [2025-03-16 13:52:38,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2025-03-16 13:52:38,959 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:38,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 125 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2025-03-16 13:52:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2025-03-16 13:52:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2025-03-16 13:52:38,972 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 153 [2025-03-16 13:52:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:38,972 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2025-03-16 13:52:38,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2025-03-16 13:52:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2025-03-16 13:52:38,973 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:38,973 INFO L218 NwaCegarLoop]: trace histogram [46, 30, 30, 30, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:52:38,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-16 13:52:39,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-16 13:52:39,173 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:39,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash -573356615, now seen corresponding path program 7 times [2025-03-16 13:52:39,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:39,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250536908] [2025-03-16 13:52:39,174 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:52:39,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:39,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 158 statements into 1 equivalence classes. [2025-03-16 13:52:39,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 158 of 158 statements. [2025-03-16 13:52:39,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:39,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2025-03-16 13:52:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:39,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250536908] [2025-03-16 13:52:39,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250536908] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:39,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478821562] [2025-03-16 13:52:39,930 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-16 13:52:39,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:39,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:39,932 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) [2025-03-16 13:52:39,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-16 13:52:40,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 158 statements into 1 equivalence classes. [2025-03-16 13:52:40,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 158 of 158 statements. [2025-03-16 13:52:40,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-16 13:52:40,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:40,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-16 13:52:40,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1359 trivial. 0 not checked. [2025-03-16 13:52:41,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1359 trivial. 0 not checked. [2025-03-16 13:52:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478821562] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:43,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:43,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 48, 48] total 127 [2025-03-16 13:52:43,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609196648] [2025-03-16 13:52:43,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:43,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2025-03-16 13:52:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:43,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2025-03-16 13:52:43,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5087, Invalid=10915, Unknown=0, NotChecked=0, Total=16002 [2025-03-16 13:52:43,654 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 127 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 127 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:43,958 INFO L93 Difference]: Finished difference Result 521 states and 573 transitions. [2025-03-16 13:52:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2025-03-16 13:52:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 127 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2025-03-16 13:52:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:43,960 INFO L225 Difference]: With dead ends: 521 [2025-03-16 13:52:43,960 INFO L226 Difference]: Without dead ends: 410 [2025-03-16 13:52:43,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5087, Invalid=10915, Unknown=0, NotChecked=0, Total=16002 [2025-03-16 13:52:43,963 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 510 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:43,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 179 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-16 13:52:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2025-03-16 13:52:43,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 210. [2025-03-16 13:52:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.014354066985646) internal successors, (212), 209 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2025-03-16 13:52:43,973 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 158 [2025-03-16 13:52:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:43,973 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2025-03-16 13:52:43,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 127 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2025-03-16 13:52:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2025-03-16 13:52:43,975 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:43,975 INFO L218 NwaCegarLoop]: trace histogram [94, 31, 31, 31, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:52:43,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-16 13:52:44,175 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,SelfDestructingSolverStorable13 [2025-03-16 13:52:44,176 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:44,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash 566193834, now seen corresponding path program 8 times [2025-03-16 13:52:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601712085] [2025-03-16 13:52:44,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:44,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 209 statements into 2 equivalence classes. [2025-03-16 13:52:44,256 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 209 of 209 statements. [2025-03-16 13:52:44,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:44,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5915 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2025-03-16 13:52:48,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:52:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601712085] [2025-03-16 13:52:48,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601712085] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:52:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427522067] [2025-03-16 13:52:48,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-16 13:52:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:52:48,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:52:48,347 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) [2025-03-16 13:52:48,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-16 13:52:48,506 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 209 statements into 2 equivalence classes. [2025-03-16 13:52:48,608 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 209 of 209 statements. [2025-03-16 13:52:48,609 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-16 13:52:48,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:52:48,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 98 conjuncts are in the unsatisfiable core [2025-03-16 13:52:48,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:52:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5915 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2025-03-16 13:52:51,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:52:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5915 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2025-03-16 13:52:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427522067] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:52:59,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:52:59,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 286 [2025-03-16 13:52:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824478232] [2025-03-16 13:52:59,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:52:59,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 287 states [2025-03-16 13:52:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:52:59,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 287 interpolants. [2025-03-16 13:52:59,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36576, Invalid=45506, Unknown=0, NotChecked=0, Total=82082 [2025-03-16 13:52:59,267 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand has 287 states, 287 states have (on average 1.0418118466898956) internal successors, (299), 286 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:52:59,684 INFO L93 Difference]: Finished difference Result 420 states and 519 transitions. [2025-03-16 13:52:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2025-03-16 13:52:59,684 INFO L78 Accepts]: Start accepts. Automaton has has 287 states, 287 states have (on average 1.0418118466898956) internal successors, (299), 286 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2025-03-16 13:52:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:52:59,686 INFO L225 Difference]: With dead ends: 420 [2025-03-16 13:52:59,686 INFO L226 Difference]: Without dead ends: 306 [2025-03-16 13:52:59,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35910 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=36576, Invalid=45506, Unknown=0, NotChecked=0, Total=82082 [2025-03-16 13:52:59,689 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:52:59,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:52:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2025-03-16 13:52:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2025-03-16 13:52:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0098360655737706) internal successors, (308), 305 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 308 transitions. [2025-03-16 13:52:59,706 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 308 transitions. Word has length 209 [2025-03-16 13:52:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:52:59,707 INFO L471 AbstractCegarLoop]: Abstraction has 306 states and 308 transitions. [2025-03-16 13:52:59,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 287 states, 287 states have (on average 1.0418118466898956) internal successors, (299), 286 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:52:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 308 transitions. [2025-03-16 13:52:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2025-03-16 13:52:59,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:52:59,709 INFO L218 NwaCegarLoop]: trace histogram [190, 31, 31, 31, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2025-03-16 13:52:59,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-16 13:52:59,910 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,SelfDestructingSolverStorable14 [2025-03-16 13:52:59,910 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:52:59,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:52:59,910 INFO L85 PathProgramCache]: Analyzing trace with hash 800160938, now seen corresponding path program 9 times [2025-03-16 13:52:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:52:59,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829528142] [2025-03-16 13:52:59,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:52:59,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:52:59,968 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 305 statements into 96 equivalence classes. [2025-03-16 13:52:59,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 77 of 305 statements. [2025-03-16 13:52:59,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 13:52:59,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19595 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 19252 trivial. 0 not checked. [2025-03-16 13:53:00,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829528142] [2025-03-16 13:53:00,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829528142] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:00,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110321968] [2025-03-16 13:53:00,212 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-16 13:53:00,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:00,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:00,215 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) [2025-03-16 13:53:00,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-16 13:53:00,440 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 305 statements into 96 equivalence classes. [2025-03-16 13:53:01,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 77 of 305 statements. [2025-03-16 13:53:01,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-03-16 13:53:01,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:01,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-16 13:53:01,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 19595 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 19252 trivial. 0 not checked. [2025-03-16 13:53:02,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:02,474 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-16 13:53:02,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2025-03-16 13:53:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19595 backedges. 27 proven. 316 refuted. 0 times theorem prover too weak. 19252 trivial. 0 not checked. [2025-03-16 13:53:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110321968] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:02,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2025-03-16 13:53:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385000432] [2025-03-16 13:53:02,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:02,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-16 13:53:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:02,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-16 13:53:02,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2025-03-16 13:53:02,489 INFO L87 Difference]: Start difference. First operand 306 states and 308 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:02,624 INFO L93 Difference]: Finished difference Result 315 states and 317 transitions. [2025-03-16 13:53:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-16 13:53:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2025-03-16 13:53:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:02,625 INFO L225 Difference]: With dead ends: 315 [2025-03-16 13:53:02,625 INFO L226 Difference]: Without dead ends: 313 [2025-03-16 13:53:02,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 595 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2025-03-16 13:53:02,626 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:02,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 150 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-16 13:53:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2025-03-16 13:53:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2025-03-16 13:53:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 313 transitions. [2025-03-16 13:53:02,642 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 313 transitions. Word has length 305 [2025-03-16 13:53:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:02,642 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 313 transitions. [2025-03-16 13:53:02,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 313 transitions. [2025-03-16 13:53:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2025-03-16 13:53:02,644 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:02,644 INFO L218 NwaCegarLoop]: trace histogram [190, 31, 31, 31, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 13:53:02,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-16 13:53:02,844 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,SelfDestructingSolverStorable15 [2025-03-16 13:53:02,845 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:02,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash -475111270, now seen corresponding path program 10 times [2025-03-16 13:53:02,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:02,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510377359] [2025-03-16 13:53:02,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:53:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:02,901 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 310 statements into 2 equivalence classes. [2025-03-16 13:53:02,929 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-16 13:53:02,930 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:53:02,930 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19613 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 18187 trivial. 0 not checked. [2025-03-16 13:53:04,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:04,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510377359] [2025-03-16 13:53:04,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510377359] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:04,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202788762] [2025-03-16 13:53:04,042 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-16 13:53:04,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:04,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:04,044 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) [2025-03-16 13:53:04,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-16 13:53:04,298 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 310 statements into 2 equivalence classes. [2025-03-16 13:53:04,450 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 310 of 310 statements. [2025-03-16 13:53:04,450 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-16 13:53:04,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:04,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 2042 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-16 13:53:04,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-16 13:53:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19613 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 18187 trivial. 0 not checked. [2025-03-16 13:53:04,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-16 13:53:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 19613 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 18187 trivial. 0 not checked. [2025-03-16 13:53:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202788762] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-16 13:53:05,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-16 13:53:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2025-03-16 13:53:05,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681752905] [2025-03-16 13:53:05,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-16 13:53:05,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2025-03-16 13:53:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-16 13:53:05,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2025-03-16 13:53:05,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 13:53:05,342 INFO L87 Difference]: Start difference. First operand 311 states and 313 transitions. Second operand has 67 states, 67 states have (on average 3.029850746268657) internal successors, (203), 67 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-16 13:53:06,020 INFO L93 Difference]: Finished difference Result 851 states and 886 transitions. [2025-03-16 13:53:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2025-03-16 13:53:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.029850746268657) internal successors, (203), 67 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 310 [2025-03-16 13:53:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-16 13:53:06,023 INFO L225 Difference]: With dead ends: 851 [2025-03-16 13:53:06,023 INFO L226 Difference]: Without dead ends: 826 [2025-03-16 13:53:06,023 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2025-03-16 13:53:06,024 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 1746 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-16 13:53:06,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1746 Valid, 324 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-16 13:53:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2025-03-16 13:53:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 410. [2025-03-16 13:53:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.0073349633251834) internal successors, (412), 409 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 412 transitions. [2025-03-16 13:53:06,059 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 412 transitions. Word has length 310 [2025-03-16 13:53:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-16 13:53:06,060 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 412 transitions. [2025-03-16 13:53:06,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.029850746268657) internal successors, (203), 67 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-16 13:53:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 412 transitions. [2025-03-16 13:53:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2025-03-16 13:53:06,063 INFO L210 NwaCegarLoop]: Found error trace [2025-03-16 13:53:06,063 INFO L218 NwaCegarLoop]: trace histogram [190, 64, 64, 64, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-16 13:53:06,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-16 13:53:06,264 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,SelfDestructingSolverStorable16 [2025-03-16 13:53:06,264 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-16 13:53:06,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-16 13:53:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1817500277, now seen corresponding path program 11 times [2025-03-16 13:53:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-16 13:53:06,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883512551] [2025-03-16 13:53:06,265 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:53:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-16 13:53:06,320 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 409 statements into 96 equivalence classes. [2025-03-16 13:53:10,223 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) and asserted 409 of 409 statements. [2025-03-16 13:53:10,223 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2025-03-16 13:53:10,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-16 13:53:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24299 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 18187 trivial. 0 not checked. [2025-03-16 13:53:13,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-16 13:53:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883512551] [2025-03-16 13:53:13,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883512551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-16 13:53:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084028873] [2025-03-16 13:53:13,026 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-16 13:53:13,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-16 13:53:13,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-16 13:53:13,029 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) [2025-03-16 13:53:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-16 13:53:13,313 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 409 statements into 96 equivalence classes.